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<document id="2C199619BE999B3C4F5FE1868D9A41AD" ID-DOI="10.3897/evolsyst.8.139468" ID-ZooBank="4D0ADC1E-13E8-404E-A10A-E28C371EBC96" ID-publisher-id="139468" URI-arpha="DC7DA357-646A-5DAF-A23F-7A75DDB76045" URI-zoobank="http://zoobank.org/4D0ADC1E-13E8-404E-A10A-E28C371EBC96" article-type="research-article" checkinTime="1734621711582" checkinUser="pensoft" docAuthor="Diez, Yander L. &amp; Schmidt-Rhaesa, Andreas" docDate="2024" docId="2061BDD826575136B5EC92E28E53D3FA" docLanguage="en" docName="Evolutionary Systematics 8(2): 279-310" docOrigin="Evolutionary Systematics 8 (2)" docSource="https://evolsyst.pensoft.net/article/139468/download/xml/" docStyle="DocumentStyle:PensoftTaxPub.0000.journal_article.generic" docStyleName="PensoftTaxPub.0000.journal_article.generic" docTitle="Stenostomum leucops Schmidt 1848" docType="treatment" docVersion="1" dtd-version="3.0" lastPageNumber="310" masterDocId="DC7DA357646A5DAFA23F7A75DDB76045" masterDocTitle="Little neighbours in Hamburg: free-living aquatic flatworms (Platyhelminthes)" masterLastPageNumber="310" masterPageNumber="279" pageNumber="279" updateTime="1734621836668" updateUser="pensoft">
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<mods:title id="475D9A7AFBEA8C31AD94E25A41BA2B55">Little neighbours in Hamburg: free-living aquatic flatworms (Platyhelminthes)</mods:title>
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<mods:namePart id="59CD372862776CFF0A94CAADE527FF41">Diez, Yander L.</mods:namePart>
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<mods:affiliation id="89B3540E504905C4DDE92DC488040DCE">Museum of Nature Hamburg Zoology, Leibniz Institute for the Analysis of Biodiversity Change (LIB), Martin-Luther-King-Platz 3, D- 20146, Hamburg, Germany &amp; Research Group Zoology: Biodiversity and Toxicology, Centre for Environmental Sciences, Hasselt University, Universitaire Campus Gebouw D, B- 3590 Diepenbeek, Belgium</mods:affiliation>
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<mods:namePart id="CF863C7D496BAE3E409924C35859F7A8">Schmidt-Rhaesa, Andreas</mods:namePart>
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<mods:affiliation id="F7227D848F62CB94CB6CF30D2A0BD157">Museum of Nature Hamburg Zoology, Leibniz Institute for the Analysis of Biodiversity Change (LIB), Martin-Luther-King-Platz 3, D- 20146, Hamburg, Germany</mods:affiliation>
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<mods:date id="2B3394DE62C03D0570A3DF9B93DDB764">2024</mods:date>
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<subSubSection id="857AD763E5492330CC66F6040BE76975" type="nomenclature">
<paragraph id="D0DE95DCE9414070021F9806A7376F16">
<taxonomicName id="F6286E152C774BBFF0F51CC793660F15" ID-CoL="525L9" authority="(Duges, 1828) Schmidt, 1848" authorityName="Schmidt" authorityYear="1848" baseAuthorityName="Duges" baseAuthorityYear="1828" family="Stenostomidae" genus="Stenostomum" kingdom="Animalia" order="Catenulida" phylum="Platyhelminthes" rank="species" species="leucops">
<emphasis id="6FDA0A0A11CC7FC7AAB4BDACAF86FCCC" italics="true">Stenostomum leucops</emphasis>
(Duges, 1828) Schmidt, 1848
</taxonomicName>
</paragraph>
</subSubSection>
<subSubSection id="BCF15684258F4AEA6A8D50362C1B0C90" type="description">
<paragraph id="04C9ADFF16D796BF3A7CC63CF336B789">
<figureCitation id="D9941B7A2BCC455E11B29EDF2CCD5D74" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Stenostomum leucops. A C Habitus of swimming specimens; D. Anterior part of the body; E. Posterior part of the body F, G. Anterior part of the body. Abbreviations: ab anterior brain; br brain; cp ciliated pits; i intestine; m mouth; np nephridiopore; pb posterior brain; ph pharynx; phg pharyngeal glands. Scale bars: 200 μm (A C); 100 μm (D, E); 50 μm (F, G)." httpUri="https://binary.pensoft.net/fig/1203015">Fig. 2</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="SECID0EITAK" type="distribution">
<paragraph id="7E3280A06862AA937E56614E4572B671">
<heading id="74593BD9DCED1DA6FFA8260CB38AEED3" reason="title">Known distribution.</heading>
</paragraph>
<paragraph id="46B46DDC94768ED27D83CFB8BACE2CA3">
Species with a broad distribution through North America (
<collectingCountry id="E93C5D6A8DB6A05E8D9E84EC8F67BEB0" name="United States of America">United States</collectingCountry>
and
<collectingCountry id="42E3DC00E278E863BE0381654DAFC5A2" name="Mexico">Mexico</collectingCountry>
) (
<bibRefCitation id="3E4819719A4B485057D497B0AF35E943" DOI="10.5962/bhl.title.16785" author="Higley" firstAuthor="Higley" journalOrPublisher="Zoological Laboratory of the University of Illinois: Illinois Biological Monographs" pagination="1-95" refId="B42" refString="Higley R (1918) Morphology and biology of some Turbellaria from the Mississsippi basin. Zoological Laboratory of the University of Illinois: Illinois Biological Monographs 4: 195. https://doi.org/10.5962/bhl.title.16785" title="Morphology and biology of some Turbellaria from the Mississsippi basin." volume="4" year="1918">Higley 1918</bibRefCitation>
;
<bibRefCitation id="322F68FA0C19E583E53B4FBCE555252A" author="Nuttycombe and Waters" firstAuthor="Nuttycombe" issue="2" journalOrPublisher="Proceedings of the American Philosophical Society" pagination="213-298" refId="B82" refString="Nuttycombe JW, Waters AJ (1938) The American species of the genus Stenostomum. Proceedings of the American Philosophical Society 79 (2): 213298." title="The American species of the genus Stenostomum." volume="79" year="1938">Nuttycombe and Waters 1938</bibRefCitation>
;
<bibRefCitation id="976E0542EF6EEB308B28C6A710B45F74" DOI="10.2307/1467222" author="Kolasa" etAl="et al." firstAuthor="Kolasa" issue="2" journalOrPublisher="Journal of the North American Benthological Society" pagination="125-132" refId="B52" refString="Kolasa J, Strayer D, Bannon-ODonnell E (1987) Microturbellarians from interstitial waters, streams, and springs in southeastern New York. Journal of the North American Benthological Society 6 (2): 125132. https://doi.org/10.2307/1467222" title="Microturbellarians from interstitial waters, streams, and springs in southeastern New York." volume="6" year="1987">Kolasa et al. 1987</bibRefCitation>
;
<bibRefCitation id="A0BA107AA4C1B1F9828820D2DBF95D6C" DOI="10.4081/jlimnol.2016.1369" author="Nunez-Ortiz" etAl="et al." firstAuthor="Nunez-Ortiz" refId="B81" refString="Núñez-Ortiz AR, Nandini S, Sarma SSS (2016) Demography and feeding behavior of Stenostomum leucops (Duges, 1828). Journal of Limnology 75 (Suppl. 1): 4855. https://doi.org/10.4081/jlimnol.2016.1369" year="2016">Núñez-Ortiz et al. 2016</bibRefCitation>
;
<bibRefCitation id="AFF12008093C31738205C6C0E891A704" DOI="10.31753/SPQQ6001_188" author="Glasgow" firstAuthor="Glasgow" issue="3" journalOrPublisher="Journal of the Mississippi Academy of Sciences" pagination="188-198" refId="B35" refString="Glasgow B (2021) Some land planarians and freshwater turbellarians (Platyhelminthes) from Mississippi, USA. Journal of the Mississippi Academy of Sciences 66 (3): 188198. https://doi.org/10.31753/SPQQ6001_188" title="Some land planarians and freshwater turbellarians (Platyhelminthes) from Mississippi, USA." volume="66" year="2021">Glasgow 2021</bibRefCitation>
), South America (
<collectingCountry id="FB6C0DF50EE76DB7D4E062ACFD658882" name="Argentina">Argentina</collectingCountry>
,
<collectingCountry id="013EB873CDE231AD7087E755EB996C7B" name="Brazil">Brazil</collectingCountry>
,
<collectingCountry id="F4D5CE9011F68C0C2C42CD31BD1F2BA6" name="Peru">Peru</collectingCountry>
, and
<collectingCountry id="E66331697F99A095AE94A28E1799D32F" name="Suriname">Suriname</collectingCountry>
) (
<bibRefCitation id="363861D1A79866E3D944B0E8D9FB0023" DOI="10.11606/issn.2526-4877.bsffclzoologia.1945.125197" author="Marcus" firstAuthor="Marcus" journalOrPublisher="Boletins da Faculdade de Filosofia Cienciase Letras, Universidade de Sao Paulo Zoologia" pagination="1-132" refId="B66" refString="Marcus E (1945) Sobre catenulida Brasileiros. Boletins da Faculdade de Filosofia Cienciase Letras, Universidade de Sao Paulo Zoologia 10: 1132. https://doi.org/10.11606/issn.2526-4877.bsffclzoologia.1945.125197" title="Sobre catenulida Brasileiros." volume="10" year="1945">Marcus 1945</bibRefCitation>
;
<bibRefCitation id="42457006E1E67B281E1B064E90ABB04B" author="van der Land" firstAuthor="van der Land" journalOrPublisher="Zoologische Bijdragen" pagination="1-46" refId="B116" refString="van der Land J (1970) Kleine dieren uit het zoete water van Suriname verslag van een onderzoek in 1967. Zoologische Bijdragen 12: 146. https://repository.naturalis.nl/pub/317275/ZB1970012001.pdf" title="Kleine dieren uit het zoete water van Suriname verslag van een onderzoek in 1967." url="https://repository.naturalis.nl/pub/317275/ZB1970012001.pdf" volume="12" year="1970">van der Land 1970</bibRefCitation>
;
<bibRefCitation id="9D032EE6937A753F0A25B8DE827EAEAE" author="Norena-Janssen" firstAuthor="Norena-Janssen" issue="2" journalOrPublisher="Archiv für Hydrobiologie" pagination="212-262" refId="B80" refString="Noreña-Janssen C (1995) Studies on the taxonomy and ecology of the Turbellaria (Platyhelminthes) in the floodplain of the Parana River (Argentina) II. Taxonomy and ecology of the Turbellaria. Archiv für Hydrobiologie 107 (2): 212262." title="Studies on the taxonomy and ecology of the Turbellaria (Platyhelminthes) in the floodplain of the Parana River (Argentina) II. Taxonomy and ecology of the Turbellaria." volume="107" year="1995">Noreña-Janssen 1995</bibRefCitation>
;
<bibRefCitation id="0E6D801823E5A1DE6469BF5D12A1BACD" DOI="10.1590/S0101-81752004000400026" author="Gamo and Leal-Zanchet" firstAuthor="Gamo" issue="4" journalOrPublisher="Revista Brasileira de Zoologia" pagination="897-903" refId="B33" refString="Gamo J, Leal-Zanchet AM (2004) Freshwater microturbellarians (Platyhelminthes) from Rio Grande do Sul, Brazil. Revista Brasileira de Zoologia 21 (4): 897903. https://doi.org/10.1590/S0101-81752004000400026" title="Freshwater microturbellarians (Platyhelminthes) from Rio Grande do Sul, Brazil." volume="21" year="2004">Gamo and Leal-Zanchet 2004</bibRefCitation>
;
<bibRefCitation id="2BBDA02D31F1663D5779776FCB804E51" DOI="10.1111/j.1096-3642.2005.00157.x" author="Norena" etAl="et al." firstAuthor="Norena" journalOrPublisher="Zoological Journal of the Linnean Society" pagination="37-58" refId="B78" refString="Noreña C, Damborenea C, Brusa F (2005) A taxonomic revision of South American species of the genus Stenostomum O. Schmidt (Platyhelminthes: Catenulida) based on morphological characters. Zoological Journal of the Linnean Society 144: 3758. https://doi.org/10.1111/j.1096-3642.2005.00157.x" title="A taxonomic revision of South American species of the genus Stenostomum O. Schmidt (Platyhelminthes: Catenulida) based on morphological characters." volume="144" year="2005">Noreña et al. 2005</bibRefCitation>
;
<bibRefCitation id="7F6CC50550A5ED79B60DD1882E2E1ED4" DOI="10.1071/IS10026" author="Damborenea" etAl="et al." firstAuthor="Damborenea" issue="2" journalOrPublisher="Invertebrate Systematics" pagination="155-169" refId="B21" refString="Damborenea C, Brusa F, Almagro I, Noreña C (2011) A phylogenetic analysis of Stenostomum and its neotropical congeners, with a description of a new species from the Peruvian Amazon Basin. Invertebrate Systematics 25 (2): 155169. https://doi.org/10.1071/IS10026" title="A phylogenetic analysis of Stenostomum and its neotropical congeners, with a description of a new species from the Peruvian Amazon Basin." volume="25" year="2011">Damborenea et al. 2011</bibRefCitation>
;
<bibRefCitation id="40BA8089DB409DDDB68FD715BAD1E505" DOI="10.6620%2FZS.2021.60-22" author="Reyes" etAl="et al." firstAuthor="Reyes" refId="B89" refString="Reyes J, Binow D, Vianna RT, Brusa F, Martins SE (2021) Free-living microturbellarians (Platyhelminthes) from wetlands in Southern Brazil, with the description of three new species. Zoological Studies 60: 22. https://doi.org/10.6620%2FZS.2021.60-22" year="2021">Reyes et al. 2021</bibRefCitation>
),
<collectingCountry id="F3EFC9BBA42CA8DB3EA196B696E40BDF" name="Iceland">Iceland</collectingCountry>
and
<collectingCountry id="EBFB5BC52EF2A2B1D47C205156C52A1B" name="Faroe Islands">Faroe Islands</collectingCountry>
(
<bibRefCitation id="7AA48A360FE6CB02F4B4F179CA805707" author="Steinbock" firstAuthor="Steinbock" issue="10" journalOrPublisher="The Zoology of Iceland" pagination="1-40" refId="B109" refString="Steinböck O (1948) Freshwater Turbellaria. The Zoology of Iceland 2 (10): 140." title="Freshwater Turbellaria." volume="2" year="1948">Steinböck 1948</bibRefCitation>
), West Europe (
<collectingCountry id="C345895807AD09CC9BD577969C14B021" name="United Kingdom">United Kingdom</collectingCountry>
,
<collectingCountry id="44493DE23E457807A1F62CA5B258801D" name="Ireland">Ireland</collectingCountry>
,
<collectingCountry id="E6401690A7FC05825D92A6BF3CD72318" name="Netherlands">The Netherlands</collectingCountry>
,
<collectingCountry id="23B7989EED17B60AD9255309D2CE9F01" name="Germany">Germany</collectingCountry>
,
<collectingCountry id="92B5DC06D1BD46661AF9B08F76C00DBD" name="Switzerland">Switzerland</collectingCountry>
, and
<collectingCountry id="66DFF1E0BF3DDC485330213CA464376E" name="Spain">Spain</collectingCountry>
) (
<bibRefCitation id="BEAD75B2E04881AC93F7A13BE834C05B" author="Graff" firstAuthor="Graff" journalOrPublisher="Verlag von Wilhelm Engelmann, Leipzig" refId="B36" refString="Graff L v (1882) Monographie der Turbellarien. I. Rhabdocoelida. Verlag von Wilhelm Engelmann, Leipzig, 441 pp." title="Monographie der Turbellarien. I. Rhabdocoelida." year="1882">Graff 1882</bibRefCitation>
;
<bibRefCitation id="2440FA2965BCCEC53C090AD728B305A1" author="Hofsten" firstAuthor="Hofsten" journalOrPublisher="Zoologiska Bidrag fran Uppsala" pagination="1-84" refId="B44" refString="Hofsten N v (1911) Neue Beobachtungen über die Rhabdocolen und Allöocoelen der Schweiz. Zoologiska Bidrag fran Uppsala 1: 184." title="Neue Beobachtungen über die Rhabdocolen und Allöocoelen der Schweiz." volume="1" year="1911">Hofsten 1911</bibRefCitation>
;
<bibRefCitation id="226771F94E0100F74D7E93FBA78EA232" author="Gieysztor" firstAuthor="Gieysztor" issue="2" journalOrPublisher="Bulletin de lAcademie Polonaise des Sciences et des Lettres" pagination="125-153" refId="B34" refString="Gieysztor M (1931) Contribution a la connaissance des Turbellariés Rhabdocèles (Turbellaria Rhabdocoela) dEspagne. Bulletin de lAcademie Polonaise des Sciences et des Lettres 3 (2): 125153." title="Contribution a la connaissance des Turbellariés Rhabdocèles (Turbellaria Rhabdocoela) dEspagne." volume="3" year="1931">Gieysztor 1931</bibRefCitation>
;
<bibRefCitation id="C206EF3A3BB5BBD8B913E0D13A106242" author="Young" firstAuthor="Young" issue="2" journalOrPublisher="Archive für Hydrobiologie" pagination="210-241" refId="B121" refString="Young JO (1970) Britisch and Irish freshwater Microturbellaria: historical records, new records and a key for their identification. Archive für Hydrobiologie 67 (2): 210241." title="Britisch and Irish freshwater Microturbellaria: historical records, new records and a key for their identification." volume="67" year="1970">Young 1970</bibRefCitation>
,
<bibRefCitation id="9CE8B3082FA38BEE79E6AB71504CE3DC" author="Young" firstAuthor="Young" journalOrPublisher="Zoologische Bijdragen" pagination="59-70" refId="B122" refString="Young JO (1972) The Turbellaria of some Friesland lakes with incidental records of Gasteropoda [sic] and Hirudinea. Zoologische Bijdragen 13: 5970." title="The Turbellaria of some Friesland lakes with incidental records of Gasteropoda [sic] and Hirudinea." volume="13" year="1972">1972</bibRefCitation>
,
<bibRefCitation id="3D5B7A350F01A51C3539B1720F12B97A" author="Young" firstAuthor="Young" issue="2" journalOrPublisher="Archive für Hydrobiologie" pagination="202-224" refId="B123" refString="Young JO (1973) The occurrence of Microturbellaria in some British lakes of diverse chemical content. Archive für Hydrobiologie 72 (2): 202224." title="The occurrence of Microturbellaria in some British lakes of diverse chemical content." volume="72" year="1973">1973</bibRefCitation>
;
<bibRefCitation id="F297952EAE921C6B00CDEB7FC2CEF378" DOI="10.1080/00222930701526055" author="Norena" etAl="et al." firstAuthor="Norena" journalOrPublisher="Journal of Natural History" pagination="29-32" refId="B79" refString="Noreña C, Damborenea C, Faubel A, Brusa F (2007) Composition of meiobenthonic Platyhelminthes from brackish environments of the Galician and Cantabrian coasts of Spain with the description of a new species of Djeziraia (Polycystididae, Kalyptorhynchia). Journal of Natural History 41: 2932. https://doi.org/10.1080/00222930701526055" title="Composition of meiobenthonic Platyhelminthes from brackish environments of the Galician and Cantabrian coasts of Spain with the description of a new species of Djeziraia (Polycystididae, Kalyptorhynchia)." volume="41" year="2007">Noreña et al. 2007</bibRefCitation>
), East Europe (
<collectingCountry id="8995C43C61597AF3B6FC461A23E630A0" name="Poland">Poland</collectingCountry>
,
<collectingCountry id="48A132CBD322408C21C06F433E95DACF" name="Romania">Romania</collectingCountry>
,
<collectingCountry id="8AA47D59A72071EDD9663CBBA8E07C52" name="Serbia">Serbia</collectingCountry>
, and
<collectingCountry id="401E847AF1C65FB1F25CF1E1136EAF97" name="Croatia">Croatia</collectingCountry>
) (
<bibRefCitation id="71C219101BE648F6ACCD0E251408072F" author="Graff" firstAuthor="Graff" journalOrPublisher="Verlag von Wilhelm Engelmann, Leipzig" refId="B36" refString="Graff L v (1882) Monographie der Turbellarien. I. Rhabdocoelida. Verlag von Wilhelm Engelmann, Leipzig, 441 pp." title="Monographie der Turbellarien. I. Rhabdocoelida." year="1882">Graff 1882</bibRefCitation>
;
<bibRefCitation id="A0FB06F9EA7526307AD0E64A087E5DBE" author="Steinbock" firstAuthor="Steinbock" issue="5" journalOrPublisher="Thalassia" pagination="1-32" refId="B108" refString="Steinböck O (1933) Die Turbellarienfauna der Umgebung von Rovigno. Thalassia 1 (5): 132." title="Die Turbellarienfauna der Umgebung von Rovigno." volume="1" year="1933">Steinböck 1933</bibRefCitation>
;
<bibRefCitation id="4A15BB643AB58D97984352751F98CADB" author="Kolasa" firstAuthor="Kolasa" issue="11" journalOrPublisher="Bulletin de lAcademie Polonaise des Science - Serie des Sciences Biologiques" pagination="743-747" refId="B51" refString="Kolasa J (1971) Two new species of Microturbellaria of the genera Stenostomum O. Schmidt and Macrostomum O. Schmidt. Bulletin de lAcademie Polonaise des Science - Serie des Sciences Biologiques 19 (11): 743747." title="Two new species of Microturbellaria of the genera Stenostomum O. Schmidt and Macrostomum O. Schmidt." volume="19" year="1971">Kolasa 1971</bibRefCitation>
;
<bibRefCitation id="21C758F0C2514051BBB19873FF43659A" author="Mack-Fira" editor="Riser NW &amp; Morse MP" firstAuthor="Mack-Fira" journalOrPublisher="McGraw-Hill, New York" pagination="248-290" refId="B63" refString="Mack-Fira V (1974) The turbellarian fauna of the Romanian littoral waters of the Black Sea and its annexes. In: Riser NW, Morse MP (Eds) Biology of Turbellaria. McGraw-Hill, New York, 248290." title="The turbellarian fauna of the Romanian littoral waters of the Black Sea and its annexes." volumeTitle="Biology of Turbellaria." year="1974">Mack-Fira 1974</bibRefCitation>
),
<collectingCountry id="5835041A5DCB5463BAA613EC126F3638" name="Russia">Russia</collectingCountry>
(
<bibRefCitation id="CC6CB8F20BB439BAB333A243385DC0E9" author="Nasonov" firstAuthor="Nasonov" issue="9" journalOrPublisher="Bulletin de lAcademie des Sciences de lURSS" pagination="817-836" refId="B75" refString="Nasonov N (1926) Die Turbellarienfauna des Leningrader Gouvernements. Bulletin de lAcademie des Sciences de lURSS 20 (9): 817836." title="Die Turbellarienfauna des Leningrader Gouvernements." volume="20" year="1926">Nasonov 1926</bibRefCitation>
;
<bibRefCitation id="AED83C2FBAB9E9FEB9D3E328ABBDFE78" author="Steinbock" firstAuthor="Steinbock" refId="B107" refString="Steinböck O (1932) Die Turbellarien des arktischen Gebietes. Fauna Arctica 297342." year="1932">Steinböck 1932</bibRefCitation>
;
<bibRefCitation id="B6303AA2749523F926A5F903448F43DB" author="Timoshkin" etAl="et al." firstAuthor="Timoshkin" refId="B111" refString="Timoshkin OA, Rozhkova NA, Zaytseva EP (2010) Diversity and ecology of free-living ciliated worms (Plathelminthes, Turbellaria) of Angara River and its catchment area with description of new species and new distribution localities of Kalyptorhynchia (Fam. Polycystididae and Rhynchokarlingiidae). In: Timoshkin OA (Ed) Index of animal species inhabiting Lake Baikal and its catchment area. Vol. II Book 1. 11251139." year="2010">Timoshkin et al. 2010</bibRefCitation>
), Asia (
<collectingCountry id="429BC5328E4CF66C200E0F2D835DBC1E" name="Thailand">Thailand</collectingCountry>
and
<collectingCountry id="702364AF43D44BFF9C5E84711BFF5013" name="Japan">Japan</collectingCountry>
) (
<bibRefCitation id="D7649F3142EF8C4A060AA39399E10778" DOI="10.1080/00380768.2012.658350" author="Yamazaki" etAl="et al." firstAuthor="Yamazaki" issue="1" journalOrPublisher="Soil Science and Plant Nutrition" pagination="11-23" refId="B120" refString="Yamazaki M, Asakawa S, Murase J, Kimura M (2012) Phylogenetic diversity of microturbellarians in Japanese rice paddy fields, with special attention to the genus Stenostomum. Soil Science and Plant Nutrition 58 (1): 1123. https://doi.org/10.1080/00380768.2012.658350" title="Phylogenetic diversity of microturbellarians in Japanese rice paddy fields, with special attention to the genus Stenostomum." volume="58" year="2012">Yamazaki et al. 2012</bibRefCitation>
;
<bibRefCitation id="DBB0E9FD6D635534420049031283CB26" author="Ngamniyom and Panyarachun" firstAuthor="Ngamniyom" issue="1" journalOrPublisher="Songklanakarin Journal of Science and Technology" pagination="41-45" refId="B76" refString="Ngamniyom A, Panyarachun B (2016) Stenostomum cf. leucops (Platyhelminthes) in Thailand: a surface observation using scanning electron microscopy and phylogenetic analysis based on 18 S ribosomal DNA sequences. Songklanakarin Journal of Science and Technology 38 (1): 4145." title="Stenostomum cf. leucops (Platyhelminthes) in Thailand: a surface observation using scanning electron microscopy and phylogenetic analysis based on 18 S ribosomal DNA sequences." volume="38" year="2016">Ngamniyom and Panyarachun 2016</bibRefCitation>
), and Africa (
<collectingCountry id="5BE2958EDEB38A88856ED62930F2B3A4" name="Tanzania">Tanzania</collectingCountry>
and
<collectingCountry id="66B7CEE626C3B28E910AC21F7DCEBE24" name="Kenya">Kenya</collectingCountry>
) (
<bibRefCitation id="13ADB2F4AD49090ACA885D009942A5BE" DOI="10.1111/j.1365-2427.1974.tb00087.x" author="Young and Kolasa" firstAuthor="Young" journalOrPublisher="Freshwater Biology" pagination="167-176" refId="B125" refString="Young JO, Kolasa J (1974) Studies on the genus Stenostomum O Schmidt (Turbellaria; Catenulida). IV. New records of established species from E. Africa, with notes on their anatomy and distribution. Freshwater Biology 4: 167176. https://doi.org/10.1111/j.1365-2427.1974.tb00087.x" title="Studies on the genus Stenostomum O Schmidt (Turbellaria; Catenulida). IV. New records of established species from E. Africa, with notes on their anatomy and distribution." volume="4" year="1974">Young and Kolasa 1974</bibRefCitation>
;
<bibRefCitation id="D7143AFCFFA81D3D8B2AE4193C1AB67D" author="Young" firstAuthor="Young" issue="5-6" journalOrPublisher="Zoologischer Anzeiger" pagination="419-432" refId="B124" refString="Young JO (1976) The freshwater Turbellaria of the African Continent. Zoologischer Anzeiger 197 (56): 419432." title="The freshwater Turbellaria of the African Continent." volume="197" year="1976">Young 1976</bibRefCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="SECID0EKXAK" type="material">
<paragraph id="4273CAA7C32583CEC5DF77A582124531">
<heading id="B5EDA09E90BD041E0C8601DA259822FA" reason="title">Material.</heading>
</paragraph>
<paragraph id="29340BDBC73F5022FC251E5907C724B0">
<specimenCount id="D41D88791C2D55AEEF6C02DB22DC6826" count="3" type="generic">Three specimens</specimenCount>
studied alive and stored in absolute ethanol; collected in Kirchwerder-Fünfhausen, submerged vegetation and litter in an irrigation channel,
<quantity id="B065479708996BD498DD17D756F7566B" metricMagnitude="-1" metricUnit="m" metricValue="1.5" metricValueMax="2.0" metricValueMin="1.0" unit="m" value="0.15" valueMax="0.2" valueMin="0.1">0.10.2 m</quantity>
deep.
<specimenCount id="987DB5AEB9D7419324156F3B8AECD27B" count="3" type="generic">Three specimens</specimenCount>
studied alive and stored in absolute ethanol; collected in Groß Glienicker lake, littoral, floating vegetation.
<specimenCount id="EEED86FBAB1FEA48A17AF441FD41DE32" count="3" type="generic">Three specimens</specimenCount>
studied alive and stored in absolute ethanol; collected in Sylt, floating vegetation in a small pond.
<specimenCount id="F3911EE575B9A1FB52F5F61CF8DD5E17" count="2" type="generic">Two specimens</specimenCount>
from Kirchwerder-Fünfhausen and one from Sylt were sequenced for the molecular analyses.
</paragraph>
</subSubSection>
<subSubSection id="SECID0EPXAK" type="remarks">
<paragraph id="DC056FCCB915B10538566202FE65D916">
<heading id="CD0F04322BDACF3B1C80F1C59025C1D1" reason="title">Remarks.</heading>
</paragraph>
<paragraph id="75D1DAF2F7BE66505B70261C49B5D68A">
Specimens measuring 11201490 µm long (
<emphasis id="24E468383D02BF09E6259C12DA536572" italics="true">x ̄</emphasis>
= 1305 µm; n = 2) and 175220 µm at widest point (
<emphasis id="FFDD6E4F87C43FE0DC1A72EE34638C8F" italics="true">x ̄</emphasis>
= 198 µm; n = 2), with two zooids, anterior end rounded and posterior tapering (Fig.
<figureCitation id="36B00A160A60B8B5AB63E7CAE99576C2" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Stenostomum leucops. A C Habitus of swimming specimens; D. Anterior part of the body; E. Posterior part of the body F, G. Anterior part of the body. Abbreviations: ab anterior brain; br brain; cp ciliated pits; i intestine; m mouth; np nephridiopore; pb posterior brain; ph pharynx; phg pharyngeal glands. Scale bars: 200 μm (A C); 100 μm (D, E); 50 μm (F, G)." httpUri="https://binary.pensoft.net/fig/1203015">2 A C</figureCitation>
). The ciliated pits (Fig.
<figureCitation id="489B34FEE62D6AB988D011B5765EC372" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Stenostomum leucops. A C Habitus of swimming specimens; D. Anterior part of the body; E. Posterior part of the body F, G. Anterior part of the body. Abbreviations: ab anterior brain; br brain; cp ciliated pits; i intestine; m mouth; np nephridiopore; pb posterior brain; ph pharynx; phg pharyngeal glands. Scale bars: 200 μm (A C); 100 μm (D, E); 50 μm (F, G)." httpUri="https://binary.pensoft.net/fig/1203015">2 D</figureCitation>
: cp) are relative short and open close to the most anterior part of the body. The epidermis is fully ciliated. Larger cilia are distributed along the body, particularly in the anterior and posterior ends. The brain (Fig.
<figureCitation id="60D16E2DEEC23E383FA4594D540EA9F4" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Stenostomum leucops. A C Habitus of swimming specimens; D. Anterior part of the body; E. Posterior part of the body F, G. Anterior part of the body. Abbreviations: ab anterior brain; br brain; cp ciliated pits; i intestine; m mouth; np nephridiopore; pb posterior brain; ph pharynx; phg pharyngeal glands. Scale bars: 200 μm (A C); 100 μm (D, E); 50 μm (F, G)." httpUri="https://binary.pensoft.net/fig/1203015">2 A, B, D</figureCitation>
: br) consists of two pairs of lobes, the anterior brain (Fig.
<figureCitation id="64C594FB554914F914FA049D1DE661F4" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Stenostomum leucops. A C Habitus of swimming specimens; D. Anterior part of the body; E. Posterior part of the body F, G. Anterior part of the body. Abbreviations: ab anterior brain; br brain; cp ciliated pits; i intestine; m mouth; np nephridiopore; pb posterior brain; ph pharynx; phg pharyngeal glands. Scale bars: 200 μm (A C); 100 μm (D, E); 50 μm (F, G)." httpUri="https://binary.pensoft.net/fig/1203015">2 F, G</figureCitation>
: ab) and the posterior brain (Fig.
<figureCitation id="65EDDC01FBB5D1A2156033F56864C5FB" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Stenostomum leucops. A C Habitus of swimming specimens; D. Anterior part of the body; E. Posterior part of the body F, G. Anterior part of the body. Abbreviations: ab anterior brain; br brain; cp ciliated pits; i intestine; m mouth; np nephridiopore; pb posterior brain; ph pharynx; phg pharyngeal glands. Scale bars: 200 μm (A C); 100 μm (D, E); 50 μm (F, G)." httpUri="https://binary.pensoft.net/fig/1203015">2 F, G</figureCitation>
: pb). The anterior brain is more distinct but does not show a clearly compartments. A pair of refractile bodies (Fig.
<figureCitation id="7D900481E642EA2C891A0CE268120E0D" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Stenostomum leucops. A C Habitus of swimming specimens; D. Anterior part of the body; E. Posterior part of the body F, G. Anterior part of the body. Abbreviations: ab anterior brain; br brain; cp ciliated pits; i intestine; m mouth; np nephridiopore; pb posterior brain; ph pharynx; phg pharyngeal glands. Scale bars: 200 μm (A C); 100 μm (D, E); 50 μm (F, G)." httpUri="https://binary.pensoft.net/fig/1203015">2 F, G</figureCitation>
: rb) are connected to the posterior brain via stalked structures. The refractile bodies are 89 µm in diameter (n = 3). The number of spherules contained in the refractile bodies is difficult to observe but they are more than
<quantity id="34773CF35AB17267040D890124713761" metricMagnitude="-1" metricUnit="m" metricValue="5.08" unit="in" value="20.0">20 in</quantity>
all studied specimens. The refractile bodies can appear either rounded or crescent-shaped, depending on the orientation of these structures.
</paragraph>
<caption id="A37FBCCBB6B9D9AB23AEAE9737EC2BBF" ID-arpha="D99F246F-345C-544A-9A7B-3590F4A2512C" httpUri="https://binary.pensoft.net/fig/1203015" startId="F2">
<paragraph id="97EA9296A0181EDE85850A8B77A74C69">
<label id="EC32F43B46E281279A1D618C1595C587">Figure 2.</label>
</paragraph>
<paragraph id="E603BFDFEAE1207CD6392E57C70F71CD">
<taxonomicName id="689DC874F05B8B41FE2E5DEC22DC7D21" authorityName="Schmidt" authorityYear="1848" baseAuthorityName="Duges" baseAuthorityYear="1828" family="Stenostomidae" genus="Stenostomum" kingdom="Animalia" phylum="Platyhelminthes" rank="species" species="leucops">
<emphasis id="E0CF6602D3CE30A9584165314F817ED0" italics="true">Stenostomum leucops</emphasis>
</taxonomicName>
.
<emphasis id="FD3C35E3C290C948D394116D02BC0AD5" bold="true">A C</emphasis>
Habitus of swimming specimens;
<emphasis id="9FC74A5709D9B9984CA73F23FFBCBF14" bold="true">D.</emphasis>
Anterior part of the body;
<emphasis id="558F56F302643B4FB87832F1E36890D3" bold="true">E.</emphasis>
Posterior part of the body
<emphasis id="074BE94C3601357FFE6CC6AE8C642080" bold="true">F, G.</emphasis>
Anterior part of the body. Abbreviations:
<emphasis id="B2C0382C4B33E7F9C6790E6B93841DC9" bold="true">ab</emphasis>
anterior brain;
<emphasis id="3457622C34A557E94A49A2B59B29E1A3" bold="true">br</emphasis>
brain;
<emphasis id="440E9737874A5DA6F875A804145CE632" bold="true">cp</emphasis>
ciliated pits;
<emphasis id="0A02344A5BBFE521FB6CC45959803959" bold="true">i</emphasis>
intestine;
<emphasis id="3639236262535C28E34404A15217004E" bold="true">m</emphasis>
mouth;
<emphasis id="C62B0DF8CFF5BC6D11AC0672EFABD110" bold="true">np</emphasis>
nephridiopore;
<emphasis id="7059B43B1216622A4C553320AE975343" bold="true">pb</emphasis>
posterior brain;
<emphasis id="05BCBCCF113E9CA5549D173EF5704D60" bold="true">ph</emphasis>
pharynx;
<emphasis id="AE92BFED9246A1C9DA50073656FE7432" bold="true">phg</emphasis>
pharyngeal glands. Scale bars: 200 μm (
<emphasis id="5D13A8AAACBB32898D54D1A6975CD735" bold="true">A C</emphasis>
); 100 μm (
<emphasis id="97A3621366F33BFF0BCA51CEEDADE2C0" bold="true">D, E</emphasis>
); 50 μm (
<emphasis id="481452A17DFCD55E3F03537248C9BE17" bold="true">F, G</emphasis>
).
</paragraph>
</caption>
<paragraph id="0C635DFF31B5FAA5BC4E95248CC57A9F">
Our identification of specimens was primarily based on
<bibRefCitation id="800F4CC92F3F9874A8F62F8AD0312962" author="Luther A" firstAuthor="Luther's" journalOrPublisher="Fauna Fennica" pagination="1-154" refId="B61" refString="Luther A (1960) Die Turbellarien Ostfennoskandiens 1. Acoela, Catenulida, Macrostomida, Lechithoepitheliata, Prolecithophora und Proseriata. Fauna Fennica 7: 1154." title="Die Turbellarien Ostfennoskandiens 1. Acoela, Catenulida, Macrostomida, Lechithoepitheliata, Prolecithophora und Proseriata." volume="7" year="1960">Luthers (1960)</bibRefCitation>
description. However, recent studies have suggested that
<taxonomicName id="B0FA779256EB0F548694DF9A290AF95F" authorityName="Schmidt" authorityYear="1848" baseAuthorityName="Duges" baseAuthorityYear="1828" family="Stenostomidae" genus="Stenostomum" kingdom="Animalia" phylum="Platyhelminthes" rank="species" species="leucops">
<emphasis id="DF740572D6DED64A4906A4F7010BDD48" italics="true">S. leucops</emphasis>
</taxonomicName>
may actually represent a complex of cryptic species, possibly related to
<taxonomicName id="3DC3509A0069D1EF6878FE4B23A29678" authority="Child, 1902" authorityName="Child" authorityYear="1902" family="Stenostomidae" genus="Stenostomum" kingdom="Animalia" phylum="Platyhelminthes" rank="species" species="grande">
<emphasis id="7567016A8A5912700247DF2C33443B8A" italics="true">S. grande</emphasis>
Child, 1902
</taxonomicName>
(see
<bibRefCitation id="B09EC4C53DBBBC47D35713B00524AED2" DOI="10.1080/00380768.2012.658350" author="Yamazaki" etAl="et al." firstAuthor="Yamazaki" issue="1" journalOrPublisher="Soil Science and Plant Nutrition" pagination="11-23" refId="B120" refString="Yamazaki M, Asakawa S, Murase J, Kimura M (2012) Phylogenetic diversity of microturbellarians in Japanese rice paddy fields, with special attention to the genus Stenostomum. Soil Science and Plant Nutrition 58 (1): 1123. https://doi.org/10.1080/00380768.2012.658350" title="Phylogenetic diversity of microturbellarians in Japanese rice paddy fields, with special attention to the genus Stenostomum." volume="58" year="2012">Yamazaki et al. 2012</bibRefCitation>
;
<bibRefCitation id="516EC4A684E57488471C106D3DF8838A" DOI="10.1590/0031-1049.2015.55.27" author="Rosa" etAl="et al." firstAuthor="Rosa" journalOrPublisher="Papéis Avulsos de Zoologia" pagination="375-383" refId="B96" refString="Rosa MT, Pereira C, Ragagnin G, Loreto E (2015) Stenostomum leucops Duges, 1828 (Platyhelminthes, Catenulida): A putative species complex with phenotypic plasticity. Papéis Avulsos de Zoologia 55: 375383. https://doi.org/10.1590/0031-1049.2015.55.27" title="Stenostomum leucops Duges, 1828 (Platyhelminthes, Catenulida): A putative species complex with phenotypic plasticity." volume="55" year="2015">Rosa et al. 2015</bibRefCitation>
). Molecular evidence supports this notion and echoes earlier discussions by
<bibRefCitation id="AC6523B534B526F05EE1BAB96DE9C7FA" author="Nuttycombe JW &amp; Waters AJ" firstAuthor="Nuttycombe" issue="2" journalOrPublisher="Proceedings of the American Philosophical Society" pagination="213-298" refId="B82" refString="Nuttycombe JW, Waters AJ (1938) The American species of the genus Stenostomum. Proceedings of the American Philosophical Society 79 (2): 213298." title="The American species of the genus Stenostomum." volume="79" year="1938">Nuttycombe and Waters (1938)</bibRefCitation>
and
<bibRefCitation id="97EA0BC299675EECAF96B5AF07854ED1" DOI="10.11606/issn.2526-4877.bsffclzoologia.1945.125197" author="Marcus E" firstAuthor="Marcus" journalOrPublisher="Boletins da Faculdade de Filosofia Cienciase Letras, Universidade de Sao Paulo Zoologia" pagination="1-132" refId="B66" refString="Marcus E (1945) Sobre catenulida Brasileiros. Boletins da Faculdade de Filosofia Cienciase Letras, Universidade de Sao Paulo Zoologia 10: 1132. https://doi.org/10.11606/issn.2526-4877.bsffclzoologia.1945.125197" title="Sobre catenulida Brasileiros." volume="10" year="1945">Marcus (1945)</bibRefCitation>
, who both deemed the available description insufficient for clear recognition of the species.
<bibRefCitation id="C95DDE40E175C2740A474271086EFA54" DOI="10.1590/0031-1049.2015.55.27" author="Rosa MT &amp; Pereira C &amp; Ragagnin G &amp; Loreto E" etAl="et al." firstAuthor="Rosa" journalOrPublisher="Papéis Avulsos de Zoologia" pagination="375-383" refId="B96" refString="Rosa MT, Pereira C, Ragagnin G, Loreto E (2015) Stenostomum leucops Duges, 1828 (Platyhelminthes, Catenulida): A putative species complex with phenotypic plasticity. Papéis Avulsos de Zoologia 55: 375383. https://doi.org/10.1590/0031-1049.2015.55.27" title="Stenostomum leucops Duges, 1828 (Platyhelminthes, Catenulida): A putative species complex with phenotypic plasticity." volume="55" year="2015">Rosa et al. (2015)</bibRefCitation>
identified three distinct clades within
<taxonomicName id="7FE255728A087484706D89434C69C0D4" authorityName="Schmidt" authorityYear="1848" baseAuthorityName="Duges" baseAuthorityYear="1828" family="Stenostomidae" genus="Stenostomum" kingdom="Animalia" phylum="Platyhelminthes" rank="species" species="leucops">
<emphasis id="F8022C133841DDF1ED1F4583DA5A01ED" italics="true">S. leucops</emphasis>
</taxonomicName>
, each distributed in
<collectingCountry id="D3009F20EF811DED973C9E957644664B" name="Brazil">Brazil</collectingCountry>
, the
<collectingCountry id="E4FCD86A05AF7299EE8C529C31D05B7D" name="United Kingdom">United Kingdom</collectingCountry>
, and
<collectingCountry id="51764821B2E94A66DC6CFB777EE3D590" name="Sweden">Sweden</collectingCountry>
, respectively, but were unable to find morphological diagnostic traits to differentiate them. The phylogenetic analysis here developed (see section Molecular phylogenetic analyses) shows a close relationship between
<taxonomicName id="C02CA1EABB7A34F7A425F37A5D0DDEA8" authorityName="Schmidt" authorityYear="1848" baseAuthorityName="Duges" baseAuthorityYear="1828" family="Stenostomidae" genus="Stenostomum" kingdom="Animalia" phylum="Platyhelminthes" rank="species" species="leucops">
<emphasis id="B8F33B4520599D7210039B1D0D1CA02A" italics="true">S. leucops</emphasis>
</taxonomicName>
from
<collectingCountry id="9A3CD9445B1636A90D0A30CA48B1BB73" name="Germany">Germany</collectingCountry>
and
<collectingCountry id="6C8688C16CCABF1D0AAEFEC64B06BBED" name="Sweden">Sweden</collectingCountry>
.
</paragraph>
<paragraph id="97DCF4A4BA32447B961E4D2D3B80217C">
Given that the
<typeStatus id="6E297E9B9B584A592E5E4270931DFD0B">type</typeStatus>
locality of
<taxonomicName id="4DC1419AD6D32C1C24D0FFF4403D9008" authorityName="Schmidt" authorityYear="1848" baseAuthorityName="Duges" baseAuthorityYear="1828" family="Stenostomidae" genus="Stenostomum" kingdom="Animalia" phylum="Platyhelminthes" rank="species" species="leucops">
<emphasis id="70AB0A015463828C962DB5AA41F92353" italics="true">S. leucops</emphasis>
</taxonomicName>
is in the vicinity of
<collectingRegion id="B482288E1BEBF56CEB60332DCFDCBF66" country="United States of America" name="New York">New York</collectingRegion>
,
<collectingCountry id="E3E5D5E97F4591A4C9CE00F6359592F9" name="United States of America">United States</collectingCountry>
, a comprehensive morphological and molecular phylogenetic analysis of specimens from that area is essential to stabilize the classification of
<taxonomicName id="169791521B467E902E04C6A5462C2789" authorityName="Schmidt" authorityYear="1848" baseAuthorityName="Duges" baseAuthorityYear="1828" family="Stenostomidae" genus="Stenostomum" kingdom="Animalia" phylum="Platyhelminthes" rank="species" species="leucops">
<emphasis id="007E37BA931D121F3881B54155032067" italics="true">S. leucops</emphasis>
</taxonomicName>
(see Discussion).
</paragraph>
</subSubSection>
</treatment>
</document>

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@ -0,0 +1,182 @@
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<mods:title id="199F8DFD67E9C50CA59855824A730360">Little neighbours in Hamburg: free-living aquatic flatworms (Platyhelminthes)</mods:title>
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</mods:role>
<mods:namePart id="4DC99226DEC05E7289BAAA2141AE742F">Diez, Yander L.</mods:namePart>
<mods:nameIdentifier id="98D421A8200CDD078B3066D0883CE7BF" type="ORCID">0000-0001-8741-4799</mods:nameIdentifier>
<mods:affiliation id="A68F7473DDB9B7009343B6EB5BBC59CD">Museum of Nature Hamburg Zoology, Leibniz Institute for the Analysis of Biodiversity Change (LIB), Martin-Luther-King-Platz 3, D- 20146, Hamburg, Germany &amp; Research Group Zoology: Biodiversity and Toxicology, Centre for Environmental Sciences, Hasselt University, Universitaire Campus Gebouw D, B- 3590 Diepenbeek, Belgium</mods:affiliation>
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<mods:namePart id="D438782ED352FEFDB0666042B2ED9753">Schmidt-Rhaesa, Andreas</mods:namePart>
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<mods:affiliation id="6E3ECBD2554945B1DB098167A2CA20E1">Museum of Nature Hamburg Zoology, Leibniz Institute for the Analysis of Biodiversity Change (LIB), Martin-Luther-King-Platz 3, D- 20146, Hamburg, Germany</mods:affiliation>
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<mods:title id="DEB6FF19729F674E096AAA61F33CAB74">Evolutionary Systematics</mods:title>
</mods:titleInfo>
<mods:part id="3449183D468C2B0C3201F46821761F54">
<mods:date id="93F15E6530041C81C746F81D52B98B11">2024</mods:date>
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<mods:number id="43F22385F13DBFC5A07455BACB652653">8</mods:number>
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<mods:identifier id="4A747DD255C0A830B11CA3CFAA5ED420" type="DOI">10.3897/evolsyst.8.139468</mods:identifier>
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<subSubSection id="F65158BB852A961E493E07AEA3C1A821" type="nomenclature">
<paragraph id="41EFA5148076BC5796D23EE451862083">
<taxonomicName id="86C790FBC0D656B11A2CBC28B8DB1BF1" ID-CoL="3XB92" authority="Papi, 1951" authorityName="Papi" authorityYear="1951" class="Trematoda" family="Macrostomidae" genus="Macrostomum" kingdom="Animalia" order="Catenulida" phylum="Platyhelminthes" rank="species" species="rostratum">
<emphasis id="A7C0D723D6315A0577BC34BB00A78D52" italics="true">Macrostomum rostratum</emphasis>
<bibRefCitation id="4189D02BFD05EEA5A9F61E5147DF73C1" author="Papi F" journalOrPublisher="Archivio Zoologico Italiano" pagination="289-340" refId="B84" refString="Papi F (1951) Ricerche sui Turbellari Macrostomidae. Archivio Zoologico Italiano 36: 289 - 340." title="Ricerche sui Turbellari Macrostomidae." volume="36" year="1951">Papi, 1951</bibRefCitation>
</taxonomicName>
</paragraph>
</subSubSection>
<subSubSection id="FDF3E5FCF0C600C58F643658FC0F4F63" type="description">
<paragraph id="2CA7553E748202D230C47B61B5106622">
<figureCitation id="09582F1D25AB0590E5C8398642E9E382" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Macrostomum rostratum. A. Habitus of a swimming specimen; B. Anterior part of the body; C F. Posterior part of the body. Abbreviations: e eye; eg egg; ph pharynx; pv prostate vesicle; st stylet; sv seminal vesicle. Scale bars: 200 μm (A); 50 μm (B F)." httpUri="https://binary.pensoft.net/fig/1203016">Fig. 3</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="SECID0EY6AK" type="distribution">
<paragraph id="B75720C5743391AC4A4588D16DF0911F">
<heading id="274A5F6D86478923BF718586C0F187CA" reason="title">Known distribution.</heading>
</paragraph>
<paragraph id="27C0F732585F5DBDBF2E7E6B6EFC69AD">
Species with a broad known distribution including Europe (
<collectingCountry id="6E00D4CCE5D4BDD940D440B65AF92CD0" name="United Kingdom">United Kingdom</collectingCountry>
,
<collectingCountry id="59979B212D5526F2CEAF0E165E9B3E5B" name="Netherlands">The Netherlands</collectingCountry>
,
<collectingCountry id="2EFA2CEE258C90CBA3207D3C4CA8177A" name="Germany">Germany</collectingCountry>
,
<collectingCountry id="46B56A1CAF49D6E3550F0B499FEDFC2A" name="Finland">Finland</collectingCountry>
,
<collectingCountry id="97B9FFEFDE5169593F4A5A857EC1C444" name="Spain">Spain</collectingCountry>
, and
<collectingCountry id="DC90295852F3C9779A8161749578D816" name="Italy">Italy</collectingCountry>
) (
<bibRefCitation id="2D864EDAC748F1856FA0CB4A42EF9B53" author="Papi" firstAuthor="Papi" journalOrPublisher="Archivio Zoologico Italiano" pagination="289-340" refId="B84" refString="Papi F (1951) Ricerche sui Turbellari Macrostomidae. Archivio Zoologico Italiano 36: 289340." title="Ricerche sui Turbellari Macrostomidae." volume="36" year="1951">Papi 1951</bibRefCitation>
;
<bibRefCitation id="BDBBF4D66A78C4A617D63A1A44476207" author="Luther" firstAuthor="Luther" journalOrPublisher="Fauna Fennica" pagination="1-154" refId="B61" refString="Luther A (1960) Die Turbellarien Ostfennoskandiens 1. Acoela, Catenulida, Macrostomida, Lechithoepitheliata, Prolecithophora und Proseriata. Fauna Fennica 7: 1154." title="Die Turbellarien Ostfennoskandiens 1. Acoela, Catenulida, Macrostomida, Lechithoepitheliata, Prolecithophora und Proseriata." volume="7" year="1960">Luther 1960</bibRefCitation>
;
<bibRefCitation id="C229708985DF2BC7243058512EEC3893" author="Rixen" firstAuthor="Rixen" issue="4" journalOrPublisher="Archive für Hydrobiologie" pagination="464-538" refId="B93" refString="Rixen J-U (1961) Kleinturbellarien aus dem Litoral der Binnengewässer Schleswig-Holsteins. Archive für Hydrobiologie 57 (4): 464538." title="Kleinturbellarien aus dem Litoral der Binnengewässer Schleswig-Holsteins." volume="57" year="1961">Rixen 1961</bibRefCitation>
;
<bibRefCitation id="587CE8BDDADA5BE4C304B4CADCA148C3" author="Young" firstAuthor="Young" issue="2" journalOrPublisher="Archive für Hydrobiologie" pagination="210-241" refId="B121" refString="Young JO (1970) Britisch and Irish freshwater Microturbellaria: historical records, new records and a key for their identification. Archive für Hydrobiologie 67 (2): 210241." title="Britisch and Irish freshwater Microturbellaria: historical records, new records and a key for their identification." volume="67" year="1970">Young 1970</bibRefCitation>
,
<bibRefCitation id="2F95801FB178B47B4D69DD456B627393" author="Young" firstAuthor="Young" issue="2" journalOrPublisher="Archive für Hydrobiologie" pagination="202-224" refId="B123" refString="Young JO (1973) The occurrence of Microturbellaria in some British lakes of diverse chemical content. Archive für Hydrobiologie 72 (2): 202224." title="The occurrence of Microturbellaria in some British lakes of diverse chemical content." volume="72" year="1973">1973</bibRefCitation>
;
<bibRefCitation id="98944E1D299BD97BFCAE4B830962059B" author="Tulp" firstAuthor="Tulp" journalOrPublisher="De Levende natur" pagination="62-69" refId="B113" refString="Tulp AS (1974) Turbellaria van Ameland. De Levende natur 77: 6269. https://natuurtijdschriften.nl/pub/494112/DLN0770620693.pdf" title="Turbellaria van Ameland." url="https://natuurtijdschriften.nl/pub/494112/DLN0770620693.pdf" volume="77" year="1974">Tulp 1974</bibRefCitation>
; Farias et al. 1996;
<bibRefCitation id="9CB8C8F0FC0504CB506F9363E25030D1" DOI="10.1080/00222930701526055" author="Norena" etAl="et al." firstAuthor="Norena" journalOrPublisher="Journal of Natural History" pagination="29-32" refId="B79" refString="Noreña C, Damborenea C, Faubel A, Brusa F (2007) Composition of meiobenthonic Platyhelminthes from brackish environments of the Galician and Cantabrian coasts of Spain with the description of a new species of Djeziraia (Polycystididae, Kalyptorhynchia). Journal of Natural History 41: 2932. https://doi.org/10.1080/00222930701526055" title="Composition of meiobenthonic Platyhelminthes from brackish environments of the Galician and Cantabrian coasts of Spain with the description of a new species of Djeziraia (Polycystididae, Kalyptorhynchia)." volume="41" year="2007">Noreña et al. 2007</bibRefCitation>
),
<collectingCountry id="88DA066AE19572006E14A38344532879" name="Russia">Russia</collectingCountry>
(
<bibRefCitation id="26B109F753162950A78102F7E990F887" author="Luther" firstAuthor="Luther" journalOrPublisher="Fauna Fennica" pagination="1-154" refId="B61" refString="Luther A (1960) Die Turbellarien Ostfennoskandiens 1. Acoela, Catenulida, Macrostomida, Lechithoepitheliata, Prolecithophora und Proseriata. Fauna Fennica 7: 1154." title="Die Turbellarien Ostfennoskandiens 1. Acoela, Catenulida, Macrostomida, Lechithoepitheliata, Prolecithophora und Proseriata." volume="7" year="1960">Luther 1960</bibRefCitation>
), and
<collectingCountry id="2293AA0E9363997E603D838356F19118" name="Kenya">Kenya</collectingCountry>
(
<bibRefCitation id="58B39A26828DF804869BC9D72F9CAE23" author="Young" firstAuthor="Young" issue="5-6" journalOrPublisher="Zoologischer Anzeiger" pagination="419-432" refId="B124" refString="Young JO (1976) The freshwater Turbellaria of the African Continent. Zoologischer Anzeiger 197 (56): 419432." title="The freshwater Turbellaria of the African Continent." volume="197" year="1976">Young 1976</bibRefCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="SECID0ECBBK" type="material">
<paragraph id="EFBFEC2F8B02CEA7D85C8BB5920FFD9C">
<heading id="30AC7AD4381462189CB3D1DCD8CA1D7C" reason="title">Material.</heading>
</paragraph>
<paragraph id="63E81F6AC2C174FEEEC999A439CB0F84">
<specimenCount id="34D77FD44EDB2202D175508CCD9C20B8" count="2" type="generic">Two specimens</specimenCount>
studied alive, one preserved in ethanol for future molecular analyses, the second cut in two pieces, the posterior part containing the stylet for whole mounting and the anterior part preserved for molecular analyses. Collected in Wandse river, submerged vegetation with organic matter,
<quantity id="A4C888F45E98593EDA94A0A4CF2E8FBE" metricMagnitude="-1" metricUnit="m" metricValue="1.0" unit="m" value="0.1">0.1 m</quantity>
deep.
</paragraph>
<paragraph id="1E04BFEC6C20B6C6853D734751400D73">
<emphasis id="BF83AD6E116B57F351A92430BF1EF4FB" bold="true">Description.</emphasis>
Animals
<quantity id="DD1F9065A03DFCFEE0C2ADE86D92660E" metricMagnitude="-4" metricUnit="m" metricValue="8.5" metricValueMax="9.0" metricValueMin="8.0" unit="mm" value="0.85" valueMax="0.9" valueMin="0.8">0.80.9 mm</quantity>
long (n = 2), unpigmented and with a pair of eyes (Fig.
<figureCitation id="5B524B3FD70D1C0AFE99E1399E70736A" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Macrostomum rostratum. A. Habitus of a swimming specimen; B. Anterior part of the body; C F. Posterior part of the body. Abbreviations: e eye; eg egg; ph pharynx; pv prostate vesicle; st stylet; sv seminal vesicle. Scale bars: 200 μm (A); 50 μm (B F)." httpUri="https://binary.pensoft.net/fig/1203016">3 A, B</figureCitation>
: e). General morphology corresponds to that in previously described specimens (see
<bibRefCitation id="8C831D03965B9B8553664065F5767C2A" author="Papi" firstAuthor="Papi" journalOrPublisher="Archivio Zoologico Italiano" pagination="289-340" refId="B84" refString="Papi F (1951) Ricerche sui Turbellari Macrostomidae. Archivio Zoologico Italiano 36: 289340." title="Ricerche sui Turbellari Macrostomidae." volume="36" year="1951">Papi 1951</bibRefCitation>
). Epidermis fully ciliated, with some larger cilia distributed though the body. False seminal vesicle absent and true seminal vesicle (Fig.
<figureCitation id="6F9ACD6C4A5C092055929D7DD4CB54BB" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Macrostomum rostratum. A. Habitus of a swimming specimen; B. Anterior part of the body; C F. Posterior part of the body. Abbreviations: e eye; eg egg; ph pharynx; pv prostate vesicle; st stylet; sv seminal vesicle. Scale bars: 200 μm (A); 50 μm (B F)." httpUri="https://binary.pensoft.net/fig/1203016">3 C E</figureCitation>
: sv) opening into the prostate vesicle (vesicula granulorum). The prostate vesicle (Fig.
<figureCitation id="8D68BE19D709E3120524FAAAD1EAFD9A" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Macrostomum rostratum. A. Habitus of a swimming specimen; B. Anterior part of the body; C F. Posterior part of the body. Abbreviations: e eye; eg egg; ph pharynx; pv prostate vesicle; st stylet; sv seminal vesicle. Scale bars: 200 μm (A); 50 μm (B F)." httpUri="https://binary.pensoft.net/fig/1203016">3 C F</figureCitation>
: pv) opens proximally into the stylet (Fig.
<figureCitation id="4868A3393F3B6285F67060B6EBD3365E" captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Stenostomum gotlandense. A. Habitus of a swimming specimen; B. Anterior part of the body; C. Anterior part of the body showing the brain; D. Posterior part of the body. Abbreviations: ab anterior brain; br brain; cp ciliated pits; ep excretophore; i intestine; m mouth; pb posterior brain; ph pharynx; pn protonephridia. Scale bars: 50 μm (A, C); 100 μm (B, D)." httpUri="https://binary.pensoft.net/fig/1203014">1 A, C F</figureCitation>
: st).
<specimenCount id="9000C32631189F7255B8B5A0AE891F0A" count="1" type="generic">One specimen</specimenCount>
had a fully developed stylet, measuring 60 µm in length; it is hook shaped and with the distal part twisted; aperture subdistal and dorsal. Well-developed eggs observed (Fig.
<figureCitation id="6FD9867C1D570AC8F92FB1E706A297B3" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Macrostomum rostratum. A. Habitus of a swimming specimen; B. Anterior part of the body; C F. Posterior part of the body. Abbreviations: e eye; eg egg; ph pharynx; pv prostate vesicle; st stylet; sv seminal vesicle. Scale bars: 200 μm (A); 50 μm (B F)." httpUri="https://binary.pensoft.net/fig/1203016">3 A, C</figureCitation>
: eg).
</paragraph>
<caption id="A7500617049B58AE23494217B8F2DDB8" ID-arpha="3C527A94-D39B-58B0-8C6D-D17603FB6068" httpUri="https://binary.pensoft.net/fig/1203016" startId="F3">
<paragraph id="0C5FD135AF41414EAF0BFC335746B498">
<label id="C8A08D476E4A2541BB09EB040853D6DB">Figure 3.</label>
</paragraph>
<paragraph id="3A348C52C5B41EC2587AD112CD56F231">
<taxonomicName id="8181194402D27234DA853965FC2637B1" authorityName="Papi" authorityYear="1951" class="Trematoda" family="Macrostomidae" genus="Macrostomum" kingdom="Animalia" order="Plagiorchiida" phylum="Platyhelminthes" rank="species" species="rostratum">
<emphasis id="57E983140D088B340A7837CBEDDFCF3E" italics="true">Macrostomum rostratum</emphasis>
</taxonomicName>
.
<emphasis id="1A9D68657A98726D8DFE7A0533728F68" bold="true">A.</emphasis>
Habitus of a swimming specimen;
<emphasis id="C3C6C150803E1B02B9106D745251725B" bold="true">B.</emphasis>
Anterior part of the body;
<emphasis id="3191FD93C290E92CE86FCC5881138E7E" bold="true">C F.</emphasis>
Posterior part of the body. Abbreviations:
<emphasis id="3CD6FB3982C52AF13690337F829010D5" bold="true">e</emphasis>
eye;
<emphasis id="873864C6B76600ADD0EAB05C39ACDD22" bold="true">eg</emphasis>
egg;
<emphasis id="1EEE784046DD5B68B05E28C54506258D" bold="true">ph</emphasis>
pharynx;
<emphasis id="5DFF4D963562C29FD4F200FB1738FB02" bold="true">pv</emphasis>
prostate vesicle;
<emphasis id="5868B99EDE52EE070FB391511EDC85C5" bold="true">st</emphasis>
stylet;
<emphasis id="B815D8461E6C18A56982C96F2440505B" bold="true">sv</emphasis>
seminal vesicle. Scale bars: 200 μm (
<emphasis id="BF2BB4DDD27BCF169CCD45A55A25203A" bold="true">A</emphasis>
); 50 μm (
<emphasis id="5AAFE88A779ECE16D5A8A1E5D29D8A63" bold="true">B F</emphasis>
).
</paragraph>
</caption>
<paragraph id="A39792C4BC70565C560A33C6E5D00CCC">
According to the drawings of
<bibRefCitation id="87EAE1A676A89C221DADDBC56375FB56" author="Papi" firstAuthor="Papi" journalOrPublisher="Archivio Zoologico Italiano" pagination="289-340" refId="B84" refString="Papi F (1951) Ricerche sui Turbellari Macrostomidae. Archivio Zoologico Italiano 36: 289340." title="Ricerche sui Turbellari Macrostomidae." volume="36" year="1951">Papi (1951</bibRefCitation>
: figs 3233) the stylet of this species measures 4265 µm, which is in the range of our collected specimen. In other populations recorded from
<collectingCountry id="37A1A042E7287E1CC158BEC057D64FC3" name="Germany">Germany</collectingCountry>
, the stylet is 6577 µm long (
<bibRefCitation id="3F689AC2169C023D38E667FC7C044E8A" author="Rixen" firstAuthor="Rixen" issue="4" journalOrPublisher="Archive für Hydrobiologie" pagination="464-538" refId="B93" refString="Rixen J-U (1961) Kleinturbellarien aus dem Litoral der Binnengewässer Schleswig-Holsteins. Archive für Hydrobiologie 57 (4): 464538." title="Kleinturbellarien aus dem Litoral der Binnengewässer Schleswig-Holsteins." volume="57" year="1961">Rixen 1961</bibRefCitation>
). The most characteristic traits for this species are the distal turn and the dorsal aperture of the stylet; therefore, we identify our specimen as
<taxonomicName id="EF4F382C55B0127E77C661003CE31428" authorityName="Papi" authorityYear="1951" class="Trematoda" family="Macrostomidae" genus="Macrostomum" kingdom="Animalia" order="Plagiorchiida" phylum="Platyhelminthes" rank="species" species="rostratum">
<emphasis id="003D254F93C050A00CBEBE393879D71A" italics="true">M. rostratum</emphasis>
</taxonomicName>
.
</paragraph>
</subSubSection>
</treatment>
</document>

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@ -0,0 +1,202 @@
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<mods:title id="D2F8BBF6783EC01C575B713ED3946619">Little neighbours in Hamburg: free-living aquatic flatworms (Platyhelminthes)</mods:title>
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<mods:namePart id="D04128F5DABADCD6A25D7DC37D785809">Schmidt-Rhaesa, Andreas</mods:namePart>
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<mods:affiliation id="36370DE7E6BC4A2D3B4FCAC35870C741">Museum of Nature Hamburg Zoology, Leibniz Institute for the Analysis of Biodiversity Change (LIB), Martin-Luther-King-Platz 3, D- 20146, Hamburg, Germany</mods:affiliation>
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<mods:title id="77AA7EFABFB9E45E77BD66019803230D">Evolutionary Systematics</mods:title>
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<mods:part id="541AC9801C73E20FA13BC4D3918940B2">
<mods:date id="FFAFD891B4449CB923D5D8D685B543A3">2024</mods:date>
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<mods:number id="9E40D7051E2F1C116BE7BB4DC196F29C">2024-12-19</mods:number>
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<mods:number id="E60C2A4DF2952C7EB99D99E11924BE0C">8</mods:number>
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<mods:identifier id="6394F67FFFBA56955FB41CC3C9E869E7" type="DOI">10.3897/evolsyst.8.139468</mods:identifier>
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<subSubSection id="14E3F7C8597FA8238AE299A87759A836" type="nomenclature">
<paragraph id="C62F9F6D6220D73C9E15D71A5EC371EA">
<taxonomicName id="7F182951665FE459C1D757722BDC999F" ID-CoL="6KVFM" authority="Ehrenberg, 1831" authorityName="Ehrenberg" authorityYear="1831" family="Polycystididae" genus="Gyratrix" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="hermaphroditus">
<emphasis id="D961E9D5829DC53CC9A57918251373B3" italics="true">Gyratrix hermaphroditus</emphasis>
Ehrenberg, 1831
</taxonomicName>
</paragraph>
</subSubSection>
<subSubSection id="0D007D6D65B1BB467D999A9BB7F254E5" type="description">
<paragraph id="B802241C4E70417B5A88448FE35DC72B">
<figureCitation id="1E385863E8646AEA078E2310709F6941" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Gyratrix hermaphroditus. A, B. Habitus of a swimming specimen; C F. Posterior part with sclerotised structures. Abbreviations: b bursa; e eye; ov ovary; ph pharynx; pr proboscis; ps 3, ps 4 prostate stylet type 3 and 4, respectively; pv prostate vesicle; t testi. Scale bars: 100 μm (A); 50 μm (B F)." httpUri="https://binary.pensoft.net/fig/1203018">Fig. 5</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="SECID0EDRBK" type="distribution">
<paragraph id="E43F8228AE7B44BA9D632593B959E7CD">
<heading id="6F47D52EC70358F33936CA410CFD5A8B" reason="title">Known distribution.</heading>
</paragraph>
<paragraph id="CD346294D5FC1C983D2A07633F9ECF4A">
This is the microturbellarian species with the widest distribution worldwide (see
<bibRefCitation id="C67B3FE37B94FA9A6391190689B0837F" DOI="10.11646/zootaxa.1849.1.1" author="Artois and Tessens" firstAuthor="Artois" journalOrPublisher="Zootaxa" pagination="1-27" refId="B8" refString="Artois TJ, Tessens BS (2008) Polycystididae (Rhabditophora: Rhabdocoela: Kalyptorhynchia) from the Indian Ocean, with the description of twelve species. Zootaxa 1849: 127. https://doi.org/10.11646/zootaxa.1849.1.1" title="Polycystididae (Rhabditophora: Rhabdocoela: Kalyptorhynchia) from the Indian Ocean, with the description of twelve species." volume="1849" year="2008">Artois and Tessens 2008</bibRefCitation>
;
<bibRefCitation id="7F84C6D1C159DDEAD043606F8F4FBF42" DOI="10.11646/zootaxa.4514.1.9" author="Diez" etAl="et al." firstAuthor="Diez" issue="1" journalOrPublisher="Zootaxa" pagination="107-125" refId="B24" refString="Diez YL, Sanjuan C, Reygel P, Roosen P, Artois T (2018) First record of Polycystididae (Platyhelminthes, Kalyptorhynchia) from Cuba, with the description of a new genus and five new species, and remarks and the description of one new species from Panama. Zootaxa 4514 (1): 107125. https://doi.org/10.11646/zootaxa.4514.1.9" title="First record of Polycystididae (Platyhelminthes, Kalyptorhynchia) from Cuba, with the description of a new genus and five new species, and remarks and the description of one new species from Panama." volume="4514" year="2018">Diez et al. 2018</bibRefCitation>
). However, this distribution corresponds to a puzzle of dozens of cryptic species (
<bibRefCitation id="75B0191F1FA7145F339517A7025DA20D" DOI="10.1111/zsc.12507" author="Tessens" etAl="et al." firstAuthor="Tessens" issue="6" journalOrPublisher="Zoologica Scripta" pagination="837-851" refId="B110" refString="Tessens B, Monnens M, Backeljau T, Jordaens K, Van Steenkiste N, Breman FC, Smeets K, Artois T (2021) Is everything everywhere? Unprecedented cryptic diversity in the cosmopolitan flatworm Gyratrix hermaphroditus. Zoologica Scripta 50 (6): 837851. https://doi.org/10.1111/zsc.12507" title="Is everything everywhere? Unprecedented cryptic diversity in the cosmopolitan flatworm Gyratrix hermaphroditus." volume="50" year="2021">Tessens et al. 2021</bibRefCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="SECID0EVRBK" type="material">
<paragraph id="5E8F8E05CED8219AAB45D9D91B3D6FFB">
<heading id="89E511E78EB6CCC8D2EE216B89634B04" reason="title">Material.</heading>
</paragraph>
<paragraph id="40BF1969FE07858061DB0F4D479263CC">
Specimens were found in two locations.
<specimenCount id="3153F29A1F59E5EC4291E05534687457" count="1" type="generic">One specimen</specimenCount>
was studied alive and preserved in ethanol for future molecular analyses. It was collected in Wandse river, submerged vegetation with organic matter,
<quantity id="DFE026516E4DC7532180681A50DE671C" metricMagnitude="-1" metricUnit="m" metricValue="1.0" unit="m" value="0.1">0.1 m</quantity>
deep.
<specimenCount id="610F0C092C8A1D6D9207C66DDA44EF74" count="15" type="generic">Fifteen specimens</specimenCount>
were studied alive, eleven of them whole mounted and four preserved for future molecular analyses collected in Kirchwerder-Fünfhausen, among submerged vegetation and litter in an irrigation channel,
<quantity id="91CECAA0935E19763F07EC086D97BD72" metricMagnitude="-1" metricUnit="m" metricValue="1.5" metricValueMax="2.0" metricValueMin="1.0" unit="m" value="0.15" valueMax="0.2" valueMin="0.1">0.10.2 m</quantity>
deep.
</paragraph>
</subSubSection>
<subSubSection id="SECID0E1RBK" type="remarks">
<paragraph id="6B6338397B78F192A51F0360C999D44B">
<heading id="05CC6FA658DEE7730BC7B41D867F0532" reason="title">Remarks.</heading>
</paragraph>
<paragraph id="CF7D5807B75BDCF4218DE0A127210737">
The specimen from Wandse river is 1354 µm long and those from Kirchwerder-Fünfhausen are 870926 µm long (
<emphasis id="DA4E2B001F204A028C0694C2115B9800" italics="true">x ̄</emphasis>
= 904 µm; n = 6). They are unpigmented, with a pair of eyes (Fig.
<figureCitation id="3503033F44FC35ECDB6FDD8C6A669208" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Gyratrix hermaphroditus. A, B. Habitus of a swimming specimen; C F. Posterior part with sclerotised structures. Abbreviations: b bursa; e eye; ov ovary; ph pharynx; pr proboscis; ps 3, ps 4 prostate stylet type 3 and 4, respectively; pv prostate vesicle; t testi. Scale bars: 100 μm (A); 50 μm (B F)." httpUri="https://binary.pensoft.net/fig/1203018">5 A</figureCitation>
: e) posterior to the proboscis (Fig.
<figureCitation id="347E7DD5D37717AA80806DCE600E3F52" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Gyratrix hermaphroditus. A, B. Habitus of a swimming specimen; C F. Posterior part with sclerotised structures. Abbreviations: b bursa; e eye; ov ovary; ph pharynx; pr proboscis; ps 3, ps 4 prostate stylet type 3 and 4, respectively; pv prostate vesicle; t testi. Scale bars: 100 μm (A); 50 μm (B F)." httpUri="https://binary.pensoft.net/fig/1203018">5 A</figureCitation>
: pr).
</paragraph>
<caption id="1F362DAE0C2DB1491018F4BD27670199" ID-arpha="7D1CE5A2-FFC8-51CA-A9BB-3AD99A1ABC15" httpUri="https://binary.pensoft.net/fig/1203018" startId="F5">
<paragraph id="454711AFC269A4A7403CFC39767D9261">
<label id="40A5522F90BA88BDDBB0819CF88BCEAE">Figure 5.</label>
</paragraph>
<paragraph id="C98CEB82757F1C276D2D86FC055E1317">
<taxonomicName id="A5B36E60CE00808E08DA437BDBED60EE" authorityName="Ehrenberg" authorityYear="1831" family="Polycystididae" genus="Gyratrix" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="hermaphroditus">
<emphasis id="0CB12985DE9CD78A70310B0F8A1B0DD9" italics="true">Gyratrix hermaphroditus</emphasis>
</taxonomicName>
.
<emphasis id="BF0AE55FAAA719B0CF238AF029CCA9D5" bold="true">A, B.</emphasis>
Habitus of a swimming specimen;
<emphasis id="477752CAE3FEE2F2CBAA1397A9FDB961" bold="true">C F.</emphasis>
Posterior part with sclerotised structures. Abbreviations:
<emphasis id="97851D923709D082282661DC4ABCD691" bold="true">b</emphasis>
bursa;
<emphasis id="41F7BE93D426C218CDB8BEA5B22E6333" bold="true">e</emphasis>
eye;
<emphasis id="FD465A8815BB43E9E1FE2963CC7A82BA" bold="true">ov</emphasis>
ovary;
<emphasis id="4D019F5F0C39F331221ADA5022C6580B" bold="true">ph</emphasis>
pharynx;
<emphasis id="8BD01D08F128E42B3D318C02923B5E5A" bold="true">pr</emphasis>
proboscis; ps 3, ps 4 prostate stylet type 3 and 4, respectively;
<emphasis id="CDBA15B215613CF052F26FE8DA6D5803" bold="true">pv</emphasis>
prostate vesicle;
<emphasis id="7329E4B67CEA803AB3792C8F42BFDC9F" bold="true">t</emphasis>
testi. Scale bars: 100 μm (
<emphasis id="0EB22FA48BFF59733D47814163A536B7" bold="true">A</emphasis>
); 50 μm (
<emphasis id="63BBB9FB72DA9F013E032067B847AA62" bold="true">B F</emphasis>
).
</paragraph>
</caption>
<paragraph id="22C52078D32C38B5E31CD9D671B8E4A8">
The testis (Fig.
<figureCitation id="A9E76C7DEF66AE414C97E659B83EBC19" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Gyratrix hermaphroditus. A, B. Habitus of a swimming specimen; C F. Posterior part with sclerotised structures. Abbreviations: b bursa; e eye; ov ovary; ph pharynx; pr proboscis; ps 3, ps 4 prostate stylet type 3 and 4, respectively; pv prostate vesicle; t testi. Scale bars: 100 μm (A); 50 μm (B F)." httpUri="https://binary.pensoft.net/fig/1203018">5 A, B</figureCitation>
: t) is located at the left body side, extending from the region of the eyes to about three quarters of body length. Ovary and atrial organs located posteriorly in the body. The prostate stylet
<typeStatus id="F62F39DA9F5C50143990854CD88A6E59">type</typeStatus>
II (Fig.
<figureCitation id="619A7C34A44462474FE8C11D1E674202" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Gyratrix hermaphroditus. A, B. Habitus of a swimming specimen; C F. Posterior part with sclerotised structures. Abbreviations: b bursa; e eye; ov ovary; ph pharynx; pr proboscis; ps 3, ps 4 prostate stylet type 3 and 4, respectively; pv prostate vesicle; t testi. Scale bars: 100 μm (A); 50 μm (B F)." httpUri="https://binary.pensoft.net/fig/1203018">5 B F</figureCitation>
: ps 2) is 189 µm long in the specimen from Wandse river and 155169 µm long (
<emphasis id="67BEDF103DE4E9DA6BA3E9499F053AD4" italics="true">x ̄</emphasis>
= 164 µm; n = 9) in those from Kirchwerder-Fünfhausen. The prostate stylet
<typeStatus id="6B643B0A177558AA5F12C243A45D51D3">type</typeStatus>
III (Fig.
<figureCitation id="AB8998081C2AA897B68F3D3631EF6859" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Gyratrix hermaphroditus. A, B. Habitus of a swimming specimen; C F. Posterior part with sclerotised structures. Abbreviations: b bursa; e eye; ov ovary; ph pharynx; pr proboscis; ps 3, ps 4 prostate stylet type 3 and 4, respectively; pv prostate vesicle; t testi. Scale bars: 100 μm (A); 50 μm (B F)." httpUri="https://binary.pensoft.net/fig/1203018">5 B F</figureCitation>
: ps 3) is 147 µm long in the specimen from Wandse river and 150 µm long (
<emphasis id="7546EA01E25A4BDFA0074D3BEE9DC903" italics="true">x ̄</emphasis>
= 131167 µm; n = 9) in those from Kirchwerder-Fünfhausen. In the specimens from both localities, the stylet
<typeStatus id="73548C2B0B875C3C65505BF3E47EADDA">type</typeStatus>
III distally bifurcates and therefore ends in two opposed tips.
</paragraph>
<paragraph id="9C3617847C2E5111A8DE09E7F00644A8">
Vitellarium not observed. The ovary (Fig.
<figureCitation id="D7D474D7EBB19097F1899DD8034162FE" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Gyratrix hermaphroditus. A, B. Habitus of a swimming specimen; C F. Posterior part with sclerotised structures. Abbreviations: b bursa; e eye; ov ovary; ph pharynx; pr proboscis; ps 3, ps 4 prostate stylet type 3 and 4, respectively; pv prostate vesicle; t testi. Scale bars: 100 μm (A); 50 μm (B F)." httpUri="https://binary.pensoft.net/fig/1203018">5 B, C</figureCitation>
: ov) is kidney shaped in the specimen from Wandse river, with the oocytes organised in a row, increasing in diameter from proximal to distal. In contrary, in the specimens from Kirchwerder-Fünfhausen, the ovary is globular, with oocytes of dissimilar size. The bursa (Fig.
<figureCitation id="3B15BE9BAE198BFBAAD3389AD84E46AE" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Gyratrix hermaphroditus. A, B. Habitus of a swimming specimen; C F. Posterior part with sclerotised structures. Abbreviations: b bursa; e eye; ov ovary; ph pharynx; pr proboscis; ps 3, ps 4 prostate stylet type 3 and 4, respectively; pv prostate vesicle; t testi. Scale bars: 100 μm (A); 50 μm (B F)." httpUri="https://binary.pensoft.net/fig/1203018">5 B D</figureCitation>
: b) is located completely posterior and overlaps with the stylets; several masses of sperm in digestion were observed.
</paragraph>
<paragraph id="ECE23342A1B97446243E20A13767C36A">
Based on our findings, it appears that the specimens collected from the two sampled localities correspond to two distinct species within the
<taxonomicName id="55E829A009C84313B4C2E517CEFC6D6C" authorityName="Ehrenberg" authorityYear="1831" family="Polycystididae" genus="Gyratrix" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="hermaphroditus">
<emphasis id="E9C4536918E2A2666F7AE2D3B72BA546" italics="true">G. hermaphroditus</emphasis>
</taxonomicName>
complex. These species are distinguishable by differences in the size of the sclerotised male structures and the morphology of the ovary. However, differentiation within this extensive species complex poses significant challenges and warrants molecular investigations. Phylogenetic analyses conducted by
<bibRefCitation id="CB7840248F45C084D428C379AFCA56FF" DOI="10.1111/zsc.12507" author="Tessens B &amp; Monnens M &amp; Backeljau T &amp; Jordaens K &amp; Van Steenkiste N &amp; Breman FC &amp; Smeets K &amp; Artois T" etAl="et al." firstAuthor="Tessens" issue="6" journalOrPublisher="Zoologica Scripta" pagination="837-851" refId="B110" refString="Tessens B, Monnens M, Backeljau T, Jordaens K, Van Steenkiste N, Breman FC, Smeets K, Artois T (2021) Is everything everywhere? Unprecedented cryptic diversity in the cosmopolitan flatworm Gyratrix hermaphroditus. Zoologica Scripta 50 (6): 837851. https://doi.org/10.1111/zsc.12507" title="Is everything everywhere? Unprecedented cryptic diversity in the cosmopolitan flatworm Gyratrix hermaphroditus." volume="50" year="2021">Tessens et al. (2021)</bibRefCitation>
revealed a remarkable diversity of 6278 species concealed under the name
<taxonomicName id="D9B3538BF7311A72E9CA6152D2F52E69" authorityName="Ehrenberg" authorityYear="1831" family="Polycystididae" genus="Gyratrix" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="hermaphroditus">
<emphasis id="F258C78C849D2BB0EE5C4D3387ACB815" italics="true">G. hermaphroditus</emphasis>
</taxonomicName>
, with many of them confined to single localities while others are more widely distributed.
</paragraph>
<paragraph id="91B8CC4DFC4217AECE10FE824E112897">
The morphology of the hard structures in our specimens appears to align with group H as defined by
<bibRefCitation id="EB3DA365827709DC88B294B17819CEA9" DOI="10.1111/zsc.12507" author="Tessens B &amp; Monnens M &amp; Backeljau T &amp; Jordaens K &amp; Van Steenkiste N &amp; Breman FC &amp; Smeets K &amp; Artois T" etAl="et al." firstAuthor="Tessens" issue="6" journalOrPublisher="Zoologica Scripta" pagination="837-851" refId="B110" refString="Tessens B, Monnens M, Backeljau T, Jordaens K, Van Steenkiste N, Breman FC, Smeets K, Artois T (2021) Is everything everywhere? Unprecedented cryptic diversity in the cosmopolitan flatworm Gyratrix hermaphroditus. Zoologica Scripta 50 (6): 837851. https://doi.org/10.1111/zsc.12507" title="Is everything everywhere? Unprecedented cryptic diversity in the cosmopolitan flatworm Gyratrix hermaphroditus." volume="50" year="2021">Tessens et al. (2021)</bibRefCitation>
, characterised by the bifurcate ending of prostate stylet
<typeStatus id="E1B4EA6F9BE9CA82441C2AE7E40192C8">type</typeStatus>
III. Notably, this group comprises exclusively freshwater species from
<collectingCountry id="39EEEDD59123418FE82B9C737F79B966" name="Australia">Australia</collectingCountry>
. However, molecular studies are essential to validate this morphological resemblance. Specimens from
<collectingCountry id="FDF9E6A11E9E2E148CE4FAEBA157314F" name="Germany">Germany</collectingCountry>
included in the aforementioned phylogenetic study fall into groups A and B (comprising freshwater and brackish species) and group L (marine species). Nonetheless, representatives from the latter three groups exhibit a prostate stylet
<typeStatus id="F001711A1E96D7BE863D92768CF380C0">type</typeStatus>
III ending in a simple, hook-shaped tip. Future integrative studies are imperative to unravel the intricate taxonomy of the
<taxonomicName id="BC744A826B0449AC50FCAE7A130F2021" authorityName="Ehrenberg" authorityYear="1831" family="Polycystididae" genus="Gyratrix" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="hermaphroditus">
<emphasis id="D10BBD9FB6CB269C9CD5C530E5D7FB4C" italics="true">G. hermaphroditus</emphasis>
</taxonomicName>
species complex, which should encompass the analysis of specimens from its
<typeStatus id="545C39622866449EA059555638383DAA">type</typeStatus>
locality in
<collectingRegion id="93898C3FC950B8FE741AFFCA5D648195" country="Germany" name="Berlin">Berlin</collectingRegion>
,
<collectingCountry id="6AB20759EAAB72F684D54401BC2D8173" name="Germany">Germany</collectingCountry>
.
</paragraph>
</subSubSection>
</treatment>
</document>

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<mods:namePart id="99AE2C45D057D233C6AF4E68E44F968F">Diez, Yander L.</mods:namePart>
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<mods:affiliation id="B28AC0BC3DF4D08D507B2ECF26AE4091">Museum of Nature Hamburg Zoology, Leibniz Institute for the Analysis of Biodiversity Change (LIB), Martin-Luther-King-Platz 3, D- 20146, Hamburg, Germany &amp; Research Group Zoology: Biodiversity and Toxicology, Centre for Environmental Sciences, Hasselt University, Universitaire Campus Gebouw D, B- 3590 Diepenbeek, Belgium</mods:affiliation>
</mods:name>
<mods:name id="784D198C1DBCA60E9CC65CC21DBEE5BB" type="personal">
<mods:role id="0AB465D6057627B037399E35C1B9CF85">
<mods:roleTerm id="4981DD695A6180F74D110D964ECC4DB6">Author</mods:roleTerm>
</mods:role>
<mods:namePart id="384E4F61AFFE06E0CB37B8283BE0FF4F">Schmidt-Rhaesa, Andreas</mods:namePart>
<mods:nameIdentifier id="590FC6377C0C4CBE74CA95C6CE1A11DA" type="ORCID">0000-0003-4102-9371</mods:nameIdentifier>
<mods:affiliation id="9815EE01E0CE74029FCB4A8CDC1F4A19">Museum of Nature Hamburg Zoology, Leibniz Institute for the Analysis of Biodiversity Change (LIB), Martin-Luther-King-Platz 3, D- 20146, Hamburg, Germany</mods:affiliation>
</mods:name>
<mods:typeOfResource id="0AD2EB253F0D17347A38BB56C8AFA214">text</mods:typeOfResource>
<mods:relatedItem id="F6CF0F062FA621BAF224F12F4E770DB6" type="host">
<mods:titleInfo id="12773F7AFA94BF575B9A632E51522483">
<mods:title id="B5C1F50B9FCE4F5FB76D81578B3C0411">Evolutionary Systematics</mods:title>
</mods:titleInfo>
<mods:part id="BCD56B5E0C68F1170E3B467B95B4BC4D">
<mods:date id="3327FE3524C0CFC7AB2CAA398259FBB4">2024</mods:date>
<mods:detail id="79C4B4E3E2C3CE63225C0786EFFB7F10" type="pubDate">
<mods:number id="7FACAD37E57493E0F6E2EF704B6AFD5F">2024-12-19</mods:number>
</mods:detail>
<mods:detail id="CF806E327555429264DA6AFFB5B6E5E9" type="volume">
<mods:number id="A9EC29FC2F5456254BFB6260DBBF4BBC">8</mods:number>
</mods:detail>
<mods:detail id="20839DFE3E623D1D7794BAC0E52EC709" type="issue">
<mods:number id="28F88F1149D043DF88F4BF8E8346EA1A">2</mods:number>
</mods:detail>
<mods:extent id="ECF2D71F051250B0999E96FA122424DF" unit="page">
<mods:start id="2EDD98B79B9BC13F42D0D4F0B1559746">279</mods:start>
<mods:end id="787F746109D6738B1833BAE332E95FDC">310</mods:end>
</mods:extent>
</mods:part>
</mods:relatedItem>
<mods:classification id="EC2E8AB6D285A54DCBCA562CC2566975">journal article</mods:classification>
<mods:identifier id="FDE0AD9065FBDE38216979CD2EE297C7" type="DOI">10.3897/evolsyst.8.139468</mods:identifier>
<mods:identifier id="0D9561D8FF018AA6904F83D0D75F7843" type="ZooBank">4D0ADC1E-13E8-404E-A10A-E28C371EBC96</mods:identifier>
</mods:mods>
<treatment id="7E99A86DF6EC5F929059E6C76CE50A53" ID-arpha="7E99A86D-F6EC-5F92-9059-E6C76CE50A53" LSID="urn:lsid:plazi:treatment:7E99A86DF6EC5F929059E6C76CE50A53" httpUri="http://treatment.plazi.org/id/7E99A86DF6EC5F929059E6C76CE50A53">
<subSubSection id="598006EEFA0B0A74D122F3E8C7F44A05" type="nomenclature">
<paragraph id="E1F378B820A129CB98CDF27ED42E6017">
<taxonomicName id="170DF44B9D1CA3A7410A769C5061266A" ID-CoL="88YSM" authority="Ijima, 1884" authorityName="Ijima" authorityYear="1884" family="Planariidae" genus="Polycelis" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="tenuis">
<emphasis id="AC00A95ECD3E82EFD130112A2CC22872" italics="true">Polycelis tenuis</emphasis>
Ijima, 1884
</taxonomicName>
</paragraph>
</subSubSection>
<subSubSection id="F575E964538A8E5D927C6EFBE819039A" type="description">
<paragraph id="6FA1048F7809AB1A255D3048CD5ADD4E">
<figureCitation id="774A62A9D341A2C7DEF7B9FEC82648EE" captionStart="Figure 14" captionStartId="F14" captionText="Figure 14. Polycelis tenuis. A. Habitus of swimming adult specimen; B. Squeezed adult specimen; C, D. Squeezed juvenile; E. Atrial organs; F. Spines of the penial papilla. Scale bars: 200 μm (D); 600 μm (E); 100 μm (F)." httpUri="https://binary.pensoft.net/fig/1203027">Fig. 14</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="SECID0ESNDK" type="distribution">
<paragraph id="6B37174F99B672652CDFEED5CABF5519">
<heading id="E5DD0A03BBE59BCE7E44B1618DA09C35" reason="title">Known distribution.</heading>
</paragraph>
<paragraph id="8C3B33BD0B846DD65A276CB4E3B6B683">
Species recorded from
<collectingCountry id="D144FA3FC9905F3B197C105210516B8E" name="Netherlands">The Netherlands</collectingCountry>
(
<bibRefCitation id="98BC6C6F01BB42F28779A0189A8FC71D" author="Young" firstAuthor="Young" journalOrPublisher="Zoologische Bijdragen" pagination="59-70" refId="B122" refString="Young JO (1972) The Turbellaria of some Friesland lakes with incidental records of Gasteropoda [sic] and Hirudinea. Zoologische Bijdragen 13: 5970." title="The Turbellaria of some Friesland lakes with incidental records of Gasteropoda [sic] and Hirudinea." volume="13" year="1972">Young 1972</bibRefCitation>
),
<collectingCountry id="D213F71C9307E683D35D2FD2FCFD8EFE" name="Finland">Finland</collectingCountry>
,
<collectingCountry id="0C0905C615AE30A57BA70A8CBE638E0F" name="United Kingdom">United Kingdom</collectingCountry>
and
<collectingCountry id="F451C6EA297F10769354D7C9B834EE3D" name="Ireland">Ireland</collectingCountry>
(
<bibRefCitation id="A3AE95E9F1EFDED0C741C321E6493ED8" author="Luther" firstAuthor="Luther" journalOrPublisher="Fauna Fennica" pagination="1-42" refId="B62" refString="Luther A (1961) Die Turbellarien Ostfennoskandiens 2. Tricladida. Fauna Fennica 11: 142." title="Die Turbellarien Ostfennoskandiens 2. Tricladida." volume="11" year="1961">Luther 1961</bibRefCitation>
), Gernany (
<bibRefCitation id="49E2BA93D4FAB1B847A4847B6A8CFC08" author="Schwank" firstAuthor="Schwank" refId="B102" refString="Schwank P (1981) Turbellarien, Oligochaeten und Archianneliden des Breitenbachs und anderer oberhessischer Mittelgebirgsbäche - 1. Lokalgeographische Verbreitung und die Verteilung der Arten in den einzelnen Gewässern in Abhängigkeit vom Substrat (Schlitzer produktionsbiologische Studien (43-1 )). Archiv für Hydrobiologie 1 (Suppl. 62): 185." year="1981">Schwank 1981</bibRefCitation>
;
<bibRefCitation id="6B2A489D18D54E4D34BDC2CDFE538C2D" DOI="10.1899/11-092.1" author="Martin and Brunke" firstAuthor="Martin" issue="2" journalOrPublisher="Freshwater Science" pagination="542-562" refId="B70" refString="Martin P, Brunke M (2012) Faunal typology of lowland springs in northern Germany. Freshwater Science 31 (2): 542562. https://doi.org/10.1899/11-092.1" title="Faunal typology of lowland springs in northern Germany." volume="31" year="2012">Martin and Brunke 2012</bibRefCitation>
), Macedonia (
<bibRefCitation id="083801938A6A1D64F34352D097ED0F1B" DOI="10.5479/si.00810282.280" author="Kenk" firstAuthor="Kenk" journalOrPublisher="Smithsonian Contributions to Zoology" pagination="1-56" refId="B50" refString="Kenk R (1978) The planarians (Turbellaria: Tricladida, Paludicola) of Lake Ohrid in Macedonia. Smithsonian Contributions to Zoology 280: 156. https://doi.org/10.5479/si.00810282.280" title="The planarians (Turbellaria: Tricladida, Paludicola) of Lake Ohrid in Macedonia." volume="280" year="1978">Kenk 1978</bibRefCitation>
),
<collectingCountry id="375F0230A0298A1714685D88CFF226F8" name="Romania">Romania</collectingCountry>
(
<bibRefCitation id="D0D22DF9E11BD0E0DB0BC38C336DFC0A" author="Felicia" firstAuthor="Felicia" journalOrPublisher="Analele Universitatii din Craiova Biologie Horticultura Tehnologia Prelucrarii Produselor Agricole Ingineria Mediului" pagination="275-285" refId="B30" refString="Felicia BA (2018) On the freshwater tricladid flatworms (Platyhelminthes, Tricladida) in the urban areas of Craiova (Romania) - Preliminary Data. Analele Universitatii din Craiova Biologie Horticultura Tehnologia Prelucrarii Produselor Agricole Ingineria Mediului 23: 275285." title="On the freshwater tricladid flatworms (Platyhelminthes, Tricladida) in the urban areas of Craiova (Romania) - Preliminary Data." volume="23" year="2018">Felicia 2018</bibRefCitation>
), and
<collectingCountry id="54D4AD7D51CAC75A5297082F8844117D" name="Russia">Russia</collectingCountry>
(
<bibRefCitation id="1DDA3245E194B28C6CD2635AF60D6918" author="Luther" firstAuthor="Luther" journalOrPublisher="Fauna Fennica" pagination="1-42" refId="B62" refString="Luther A (1961) Die Turbellarien Ostfennoskandiens 2. Tricladida. Fauna Fennica 11: 142." title="Die Turbellarien Ostfennoskandiens 2. Tricladida." volume="11" year="1961">Luther 1961</bibRefCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="SECID0EUODK" type="material">
<paragraph id="6FB70DC0DAB055207837C4C572A925E3">
<heading id="9B50F7FF2CD568508841CCEA0AB6D881" reason="title">Material.</heading>
</paragraph>
<paragraph id="5F020478013FE3814E767C516DE733C6">
<specimenCount id="C0ACD6F699D393B4A73D1E1D8B71F95A" count="6" type="generic">Six specimens</specimenCount>
studied alive, preserved in absolute ethanol for future molecular analyses; collected in Kirchwerder-Fünfhausen, submerged vegetation and litter in an irrigation channel,
<quantity id="22286E081C2998729EC83AF03B8FA51C" metricMagnitude="-1" metricUnit="m" metricValue="1.5" metricValueMax="2.0" metricValueMin="1.0" unit="m" value="0.15" valueMax="0.2" valueMin="0.1">0.10.2 m</quantity>
deep.
</paragraph>
</subSubSection>
<subSubSection id="SECID0EZODK" type="remarks">
<paragraph id="4029532875270D46CD742774D2085591">
<heading id="5530B7627F1F353F6EE693575EDB0895" reason="title">Remarks.</heading>
</paragraph>
<paragraph id="D73393D369B6591917971B4C2E21E662">
Mature specimens measuring
<quantity id="34B3363269631225129B60CD8A5FBEB3" metricMagnitude="-4" metricUnit="m" metricValue="8.5" metricValueMax="12.0" metricValueMin="5.0" unit="mm" value="0.85" valueMax="1.2" valueMin="0.5">0.51.2 mm</quantity>
, dark coloured (Fig.
<figureCitation id="25CC4029EB9CFB07CE8AB9F58E6BF3FF" captionStart="Figure 14" captionStartId="F14" captionText="Figure 14. Polycelis tenuis. A. Habitus of swimming adult specimen; B. Squeezed adult specimen; C, D. Squeezed juvenile; E. Atrial organs; F. Spines of the penial papilla. Scale bars: 200 μm (D); 600 μm (E); 100 μm (F)." httpUri="https://binary.pensoft.net/fig/1203027">14 A, B</figureCitation>
). Marginal eyes (Fig.
<figureCitation id="10067E8A5ED9C445BDBEFAA27562076C" captionStart="Figure 14" captionStartId="F14" captionText="Figure 14. Polycelis tenuis. A. Habitus of swimming adult specimen; B. Squeezed adult specimen; C, D. Squeezed juvenile; E. Atrial organs; F. Spines of the penial papilla. Scale bars: 200 μm (D); 600 μm (E); 100 μm (F)." httpUri="https://binary.pensoft.net/fig/1203027">14 C, D</figureCitation>
: e) distributed over the anterior third of the body. The pharynx (Fig.
<figureCitation id="FEB2CE4E7E7D9995EF265E443715FC3F" captionStart="Figure 14" captionStartId="F14" captionText="Figure 14. Polycelis tenuis. A. Habitus of swimming adult specimen; B. Squeezed adult specimen; C, D. Squeezed juvenile; E. Atrial organs; F. Spines of the penial papilla. Scale bars: 200 μm (D); 600 μm (E); 100 μm (F)." httpUri="https://binary.pensoft.net/fig/1203027">14 B, C</figureCitation>
) is located over the midbody and the mouth (Fig.
<figureCitation id="7C4B33CE74982D52E6BDF0140E4A3265" captionStart="Figure 14" captionStartId="F14" captionText="Figure 14. Polycelis tenuis. A. Habitus of swimming adult specimen; B. Squeezed adult specimen; C, D. Squeezed juvenile; E. Atrial organs; F. Spines of the penial papilla. Scale bars: 200 μm (D); 600 μm (E); 100 μm (F)." httpUri="https://binary.pensoft.net/fig/1203027">14 C, E</figureCitation>
: m) opens anterior to the male copulatory organ. The male copulatory organ (Fig.
<figureCitation id="1477A010EDFB421956452871BEC38706" captionStart="Figure 14" captionStartId="F14" captionText="Figure 14. Polycelis tenuis. A. Habitus of swimming adult specimen; B. Squeezed adult specimen; C, D. Squeezed juvenile; E. Atrial organs; F. Spines of the penial papilla. Scale bars: 200 μm (D); 600 μm (E); 100 μm (F)." httpUri="https://binary.pensoft.net/fig/1203027">14 B, E</figureCitation>
: mco) is 9401100 µm long (n = 1; varying according to the relaxing stage) and 620 µm at widest. The male organ is spiny over its distal 300480 µm, and forms a penial papilla (Fig.
<figureCitation id="8CB4128D308A766F6B88A8B06D6C0816" captionStart="Figure 14" captionStartId="F14" captionText="Figure 14. Polycelis tenuis. A. Habitus of swimming adult specimen; B. Squeezed adult specimen; C, D. Squeezed juvenile; E. Atrial organs; F. Spines of the penial papilla. Scale bars: 200 μm (D); 600 μm (E); 100 μm (F)." httpUri="https://binary.pensoft.net/fig/1203027">14 E</figureCitation>
:
<abbrev id="ABBRID0EXPDK" xlink_title="posterior probabilities">pp</abbrev>
). The spines (Fig.
<figureCitation id="A6D1448DE5B80DCE6881DAD0230FB095" captionStart="Figure 14" captionStartId="F14" captionText="Figure 14. Polycelis tenuis. A. Habitus of swimming adult specimen; B. Squeezed adult specimen; C, D. Squeezed juvenile; E. Atrial organs; F. Spines of the penial papilla. Scale bars: 200 μm (D); 600 μm (E); 100 μm (F)." httpUri="https://binary.pensoft.net/fig/1203027">14 F</figureCitation>
) are 1718 µm long (n = 10). Two adenodactyls (Fig.
<figureCitation id="653409774323CECD6355B2D99A90908B" captionStart="Figure 14" captionStartId="F14" captionText="Figure 14. Polycelis tenuis. A. Habitus of swimming adult specimen; B. Squeezed adult specimen; C, D. Squeezed juvenile; E. Atrial organs; F. Spines of the penial papilla. Scale bars: 200 μm (D); 600 μm (E); 100 μm (F)." httpUri="https://binary.pensoft.net/fig/1203027">14 E</figureCitation>
: ad) are located posterior to the male bulb and open into the common atrium, oriented forward, and exhibiting a glandular lumen.
</paragraph>
<caption id="2866BB286034A0E4BDACC859F1EC93AE" ID-arpha="294F6AE4-EDCB-509D-9C50-3B60BFF6EFCA" httpUri="https://binary.pensoft.net/fig/1203027" startId="F14">
<paragraph id="C00ACC14C399DC189622CCB5F13517EE">
<label id="148B821463C5E906D9515F70FD05C422">Figure 14.</label>
</paragraph>
<paragraph id="EDA350FF2671663DF428731FC0C111C0">
<taxonomicName id="32077DAC107508A5FD399C5205E019C6" authorityName="Ijima" authorityYear="1884" family="Planariidae" genus="Polycelis" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="tenuis">
<emphasis id="559A0AE741448F3AED1943B925451156" italics="true">Polycelis tenuis</emphasis>
</taxonomicName>
.
<emphasis id="A0BBB192679052E7AC2B4F7929490924" bold="true">A.</emphasis>
Habitus of swimming adult specimen;
<emphasis id="35F6566A365A2E0260A2F0B6483907D4" bold="true">B.</emphasis>
Squeezed adult specimen;
<emphasis id="F964BD3B5E117406C87087B93D65D3FD" bold="true">C, D.</emphasis>
Squeezed juvenile;
<emphasis id="1C45BF94B4F870CC00864241704E819F" bold="true">E.</emphasis>
Atrial organs;
<emphasis id="EDD9820E2B715AF3C84E3F061F80A033" bold="true">F.</emphasis>
Spines of the penial papilla. Scale bars: 200 μm (
<emphasis id="252A0FBC1D3E556E8D33967A5A667FD9" bold="true">D</emphasis>
); 600 μm (
<emphasis id="C515745DC900CC02B1DCAA18859C3D2D" bold="true">E</emphasis>
); 100 μm (
<emphasis id="E2F30D26CC81ECF48DEFF1289DD2659F" bold="true">F</emphasis>
).
</paragraph>
</caption>
<paragraph id="19A7167AE6677BF0D885BB10A264B684">
Three species of
<taxonomicName id="42983F9A9F77355158C6CC80C77DC611" authorityName="Ehrenberg" authorityYear="1831" family="Planariidae" genus="Polycelis" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="genus">
<emphasis id="F3B91105F40579CABF6BF4E1BFF7AFA1" italics="true">Polycelis</emphasis>
</taxonomicName>
have been documented in
<collectingCountry id="7993A14379E6E02548690787A34F7739" name="Germany">Germany</collectingCountry>
, and they are widespread across Europe:
<taxonomicName id="61AEE8F4498E85846F63194E203FC7B7" baseAuthorityName="Dalyell" baseAuthorityYear="1814" family="Planariidae" genus="Polycelis" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="felina">
<emphasis id="4B4E28F572B23CC8055807AC38B95FE0" italics="true">P. felina</emphasis>
</taxonomicName>
,
<taxonomicName id="476DB4DCEEE391CB64C42617C350274F" authorityName="Ehrenberg" authorityYear="1831" baseAuthorityName="Muller" baseAuthorityYear="1774" family="Planariidae" genus="Polycelis" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="nigra">
<emphasis id="AAD7C9443923D90739B66D6DE7B09822" italics="true">P. nigra</emphasis>
</taxonomicName>
, and
<taxonomicName id="B32D79FFD734F6527AAA73BF97FDFA0F" authorityName="Ijima" authorityYear="1884" family="Planariidae" genus="Polycelis" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="tenuis">
<emphasis id="1537C5DFFF05EB838F2DD2AB71859A38" italics="true">P. tenuis</emphasis>
</taxonomicName>
(
<bibRefCitation id="FAF0415CC2A360A3E12D14764412E765" author="Volk" firstAuthor="Volk" journalOrPublisher="Mitteilungen aus dem Naturhistorischen Museum" pagination="6-154" refId="B119" refString="Volk R (1903) Die biologischen Verhältnisse der Elbe bei Hamburg. Einwirkung der Sielwässer auf die Organismen des Stromes. Mitteilungen aus dem Naturhistorischen Museum 19: 6154. https://www.zobodat.at/pdf/Mitt-Naturhist-Mus-Hamburg_19_0063-0154.pdf" title="Die biologischen Verhältnisse der Elbe bei Hamburg. Einwirkung der Sielwässer auf die Organismen des Stromes." url="https://www.zobodat.at/pdf/Mitt-Naturhist-Mus-Hamburg_19_0063-0154.pdf" volume="19" year="1903">Volk 1903</bibRefCitation>
;
<bibRefCitation id="9BF45CF53A79B6B69A0C0050086EA929" author="Ronneberger" firstAuthor="Ronneberger" issue="3" journalOrPublisher="Limnologica" pagination="323-419" refId="B94" refString="Ronneberger D (1975) Zur Kenntnis der Grundwasserfauna des Saale-Einzugsgebietes (Thüringen). Limnologica 9 (3): 323419." title="Zur Kenntnis der Grundwasserfauna des Saale-Einzugsgebietes (Thüringen)." volume="9" year="1975">Ronneberger 1975</bibRefCitation>
;
<bibRefCitation id="83799ED6635E438747E6BB16DEC13603" author="Schwank" firstAuthor="Schwank" refId="B102" refString="Schwank P (1981) Turbellarien, Oligochaeten und Archianneliden des Breitenbachs und anderer oberhessischer Mittelgebirgsbäche - 1. Lokalgeographische Verbreitung und die Verteilung der Arten in den einzelnen Gewässern in Abhängigkeit vom Substrat (Schlitzer produktionsbiologische Studien (43-1 )). Archiv für Hydrobiologie 1 (Suppl. 62): 185." year="1981">Schwank 1981</bibRefCitation>
;
<bibRefCitation id="854033EAFB70BF5C8D137448D059DD2E" author="Muller and Faubel" firstAuthor="Muller" pagination="363-396" refId="B73" refString="Müller D, Faubel A (1993) The Turbellaria of the River Elbe Estuary. A faunistic analysis of oligohaline and limnic areas. Archiv für Hydrobiologie Suppl. 75: 363396." title="The Turbellaria of the River Elbe Estuary. A faunistic analysis of oligohaline and limnic areas. Archiv für Hydrobiologie Suppl." volume="75" year="1993">Müller and Faubel 1993</bibRefCitation>
). Among these, only
<taxonomicName id="44C048FF40C932276FF8F5B5F4534D81" authorityName="Ehrenberg" authorityYear="1831" baseAuthorityName="Muller" baseAuthorityYear="1774" family="Planariidae" genus="Polycelis" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="nigra">
<emphasis id="ACFA395208F456B9100B37BF03E0BCB6" italics="true">P. nigra</emphasis>
</taxonomicName>
has been reported in
<collectingRegion id="E6BE7C3924807618236330564948B0A4" country="Germany" name="Hamburg">Hamburg</collectingRegion>
(
<bibRefCitation id="E155D7F8AFB29A5B2BB656A57AB2F079" author="Volk" firstAuthor="Volk" journalOrPublisher="Mitteilungen aus dem Naturhistorischen Museum" pagination="6-154" refId="B119" refString="Volk R (1903) Die biologischen Verhältnisse der Elbe bei Hamburg. Einwirkung der Sielwässer auf die Organismen des Stromes. Mitteilungen aus dem Naturhistorischen Museum 19: 6154. https://www.zobodat.at/pdf/Mitt-Naturhist-Mus-Hamburg_19_0063-0154.pdf" title="Die biologischen Verhältnisse der Elbe bei Hamburg. Einwirkung der Sielwässer auf die Organismen des Stromes." url="https://www.zobodat.at/pdf/Mitt-Naturhist-Mus-Hamburg_19_0063-0154.pdf" volume="19" year="1903">Volk 1903</bibRefCitation>
). Species within the genus
<taxonomicName id="11BE6BD5F89E3707B97A17BB17F58E5C" authorityName="Ehrenberg" authorityYear="1831" family="Planariidae" genus="Polycelis" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="genus">
<emphasis id="B93799DF23A4991D665ECB5D144B9A1D" italics="true">Polycelis</emphasis>
</taxonomicName>
are primarily distinguished by the structure of the male bulb and adenodactyls.
<taxonomicName id="E892CAB077E7C3AAC4CE37355513DE24" authorityName="Ijima" authorityYear="1884" family="Planariidae" genus="Polycelis" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="tenuis">
<emphasis id="19556E49D603F4F803111D048C5C62BC" italics="true">Polycelis tenuis</emphasis>
</taxonomicName>
shares with
<taxonomicName id="588F941D0D99C60CC17BC86E0FDCC54D" baseAuthorityName="Dalyell" baseAuthorityYear="1814" family="Planariidae" genus="Polycelis" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="felina">
<emphasis id="AB0110870AD2F5ED54C5E59D8C0B742E" italics="true">P. felina</emphasis>
</taxonomicName>
the presence of two adenodactyls, structures absent in
<taxonomicName id="DAA286A0F6933F7359C6A87BA37A96D7" authorityName="Ehrenberg" authorityYear="1831" baseAuthorityName="Muller" baseAuthorityYear="1774" family="Planariidae" genus="Polycelis" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="nigra">
<emphasis id="4A0C747C392BDF9542FE283662E059AF" italics="true">P. nigra</emphasis>
</taxonomicName>
. However,
<taxonomicName id="B07AD0051F2F236B3283F4B45B258E1D" baseAuthorityName="Dalyell" baseAuthorityYear="1814" family="Planariidae" genus="Polycelis" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="felina">
<emphasis id="692A4D6C693A337D634988A5A34B4878" italics="true">P. felina</emphasis>
</taxonomicName>
is easily identifiable by the presence of two tentacles in its anterior body region. The penial papilla of
<taxonomicName id="48CA062C34044B9B2ABE27EA8137C5C0" authorityName="Ijima" authorityYear="1884" family="Planariidae" genus="Polycelis" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="tenuis">
<emphasis id="FB20EF3BD51119605253A31A452D0F88" italics="true">P. tenuis</emphasis>
</taxonomicName>
is armed with spines along its distal half, whereas
<taxonomicName id="8A9FA16E4F58066CBADC7E23B7DB1584" authorityName="Ehrenberg" authorityYear="1831" baseAuthorityName="Muller" baseAuthorityYear="1774" family="Planariidae" genus="Polycelis" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="nigra">
<emphasis id="3605303750DB1A696DE25661E99F15D1" italics="true">P. nigra</emphasis>
</taxonomicName>
exhibits two to three spine rows distally, and
<taxonomicName id="77664F355BEC7A6F4BEC7C95F3F9AB0D" baseAuthorityName="Dalyell" baseAuthorityYear="1814" family="Planariidae" genus="Polycelis" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="felina">
<emphasis id="9CD3CD56717E5BF6990D57B5B521FC66" italics="true">P. felina</emphasis>
</taxonomicName>
lacks any spines in this region (
<bibRefCitation id="D923974D7E4B3A26D68970D28AE5CED9" DOI="10.1038/173354b0" author="Hansen-Melander" etAl="et al." firstAuthor="Hansen-Melander" journalOrPublisher="Nature" pagination="354-355" refId="B40" refString="Hansen-Melander E, Melander Y, Reynoldsen TB (1954) A new species of freshwater triclad belonging to the genus Polycelis. Nature 173: 354355. https://doi.org/10.1038/173354b0" title="A new species of freshwater triclad belonging to the genus Polycelis." volume="173" year="1954">Hansen-Melander et al. 1954</bibRefCitation>
;
<bibRefCitation id="966C8BB58E0E246F359DF937907AFFC1" author="Luther" firstAuthor="Luther" journalOrPublisher="Fauna Fennica" pagination="1-42" refId="B62" refString="Luther A (1961) Die Turbellarien Ostfennoskandiens 2. Tricladida. Fauna Fennica 11: 142." title="Die Turbellarien Ostfennoskandiens 2. Tricladida." volume="11" year="1961">Luther 1961</bibRefCitation>
;
<bibRefCitation id="7A36AE7436DB0F44D2116218F447810D" DOI="10.11646/zootaxa.3182.1.1" author="Harrath" etAl="et al." firstAuthor="Harrath" issue="1" journalOrPublisher="Zootaxa" pagination="1-15" refId="B41" refString="Harrath AH, Sluys R, Merzoug D, Yacoubi-Khebiza M, Alwasel S, Riutort M (2012) Freshwater planarians (Platyhelminthes, Tricladida) from the Palearctic section of the African continent: new records, with the description of a new species. Zootaxa 3182 (1): 115. https://doi.org/10.11646/zootaxa.3182.1.1" title="Freshwater planarians (Platyhelminthes, Tricladida) from the Palearctic section of the African continent: new records, with the description of a new species." volume="3182" year="2012">Harrath et al. 2012</bibRefCitation>
).
<bibRefCitation id="DD834AA91E5050B510FC0297E1A46915" author="Volk R" firstAuthor="Volk" journalOrPublisher="Mitteilungen aus dem Naturhistorischen Museum" pagination="6-154" refId="B119" refString="Volk R (1903) Die biologischen Verhältnisse der Elbe bei Hamburg. Einwirkung der Sielwässer auf die Organismen des Stromes. Mitteilungen aus dem Naturhistorischen Museum 19: 6154. https://www.zobodat.at/pdf/Mitt-Naturhist-Mus-Hamburg_19_0063-0154.pdf" title="Die biologischen Verhältnisse der Elbe bei Hamburg. Einwirkung der Sielwässer auf die Organismen des Stromes." url="https://www.zobodat.at/pdf/Mitt-Naturhist-Mus-Hamburg_19_0063-0154.pdf" volume="19" year="1903">Volk (1903)</bibRefCitation>
did not provide detailed morphological information about the specimens of
<taxonomicName id="0516B87452D4DCC125AD6A70A97F8534" authorityName="Ehrenberg" authorityYear="1831" baseAuthorityName="Muller" baseAuthorityYear="1774" family="Planariidae" genus="Polycelis" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="nigra">
<emphasis id="EB0BD5EE1CC61E802AC3B09FFE523227" italics="true">P. nigra</emphasis>
</taxonomicName>
recorded in
<collectingRegion id="DB0BFBC65DEAD331E276D69FDE5B77D4" country="Germany" name="Hamburg">Hamburg</collectingRegion>
. Given the necessity of studying the morphology of atrial organs for accurate identification of these triclads, this record requires confirmation.
</paragraph>
</subSubSection>
</treatment>
</document>

View file

@ -0,0 +1,213 @@
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<mods:title id="8E4BD01DBC4832C8A811225430CD0A28">Little neighbours in Hamburg: free-living aquatic flatworms (Platyhelminthes)</mods:title>
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<treatment id="8152BF87806458849379CA9F9270C162" ID-arpha="8152BF87-8064-5884-9379-CA9F9270C162" LSID="urn:lsid:plazi:treatment:8152BF87806458849379CA9F9270C162" httpUri="http://treatment.plazi.org/id/8152BF87806458849379CA9F9270C162">
<subSubSection id="409B89F0F5FC43C90C0E84C1FE0A3617" type="nomenclature">
<paragraph id="FEF67345662C00A903EE62CB80D66C8D">
<taxonomicName id="A1E57DDDCB156B5AB3C8DF164886ECB3" ID-CoL="4JJCL" authority="(Muller, 1773) Muller, 1776" authorityName="Muller" authorityYear="1776" baseAuthorityName="Muller" baseAuthorityYear="1773" family="Planariidae" genus="Planaria" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="torva">
<emphasis id="2B5359F3E5C1A67F191FE6C5E411D806" italics="true">Planaria torva</emphasis>
(Müller, 1773) Müller, 1776
</taxonomicName>
</paragraph>
</subSubSection>
<subSubSection id="37F5F217793E4D503BEF2AE8BAF78A14" type="description">
<paragraph id="837DAA232850995BA312EB852BC0DC0C">
<figureCitation id="5139391116768C4F0FC6CBCC58B1BBBE" captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Planaria torva. A. Habitus of swimming specimen; B D. Squeezed specimen." httpUri="https://binary.pensoft.net/fig/1203026">Fig. 13</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="SECID0EAGDK" type="distribution">
<paragraph id="B61FB91DB2832294B06F65A5EEC5E2D5">
<heading id="C6E8B6769648E0CBE94420C1DE74A92D" reason="title">Known distribution.</heading>
</paragraph>
<paragraph id="1A1BEB105042A5E9A6BA447C16EA7F6D">
Species broadly distributed in West Europe (
<collectingCountry id="AE2C0C8818911F1FCE6D54D24DF3C8DF" name="United Kingdom">United Kingdom</collectingCountry>
,
<collectingCountry id="17A7E0E542C7595F203174AAC6368C1E" name="Ireland">Ireland</collectingCountry>
,
<collectingCountry id="D9D2553D3E9D003DD369DFD819387AB8" name="Belgium">Belgium</collectingCountry>
,
<collectingCountry id="664F4A813BB74B936981C19A523A0F3B" name="Finland">Finland</collectingCountry>
,
<collectingCountry id="3F2448ADA5AC79C37A76D704BD0C082D" name="Sweden">Sweden</collectingCountry>
,
<collectingCountry id="55C819C11621313E7C3F3CEE4212B51E" name="Denmark">Denmark</collectingCountry>
,
<collectingCountry id="3386AEAB45BBF6D84EA7A06976ACE1E3" name="Germany">Germany</collectingCountry>
,
<collectingCountry id="C7054501C6BAC0E1AFD4C9C67BCE8F97" name="Greece">Greece</collectingCountry>
,
<collectingCountry id="B8D7421FC96A3868D4F41656C80898CF" name="France">France</collectingCountry>
, and
<collectingCountry id="9378429D154F0534244684187CBB0EED" name="Italy">Italy</collectingCountry>
) (
<bibRefCitation id="2FB86567A2C18DFD5363A00994DE49E0" author="Arndt" firstAuthor="Arndt" issue="2" journalOrPublisher="Mitteilungen aus dem Zoologischen Museum in Berlin" pagination="218-222" refId="B6" refString="Arndt W (1926) Beiträge zur Kenntnis der Land- und Süsswasserfauna Korsikas. I. Ergebnisse der Dr. Paul Schottlander-Lehrexpedition des Jahres 1914. 2. Turbellaria. Mitteilungen aus dem Zoologischen Museum in Berlin 12 (2): 218222." title="Beiträge zur Kenntnis der Land- und Süsswasserfauna Korsikas. I. Ergebnisse der Dr. Paul Schottlander-Lehrexpedition des Jahres 1914. 2. Turbellaria." volume="12" year="1926">Arndt 1926</bibRefCitation>
;
<bibRefCitation id="01054335C8072F868BA9E0B072220549" author="Luther" firstAuthor="Luther" journalOrPublisher="Fauna Fennica" pagination="1-42" refId="B62" refString="Luther A (1961) Die Turbellarien Ostfennoskandiens 2. Tricladida. Fauna Fennica 11: 142." title="Die Turbellarien Ostfennoskandiens 2. Tricladida." volume="11" year="1961">Luther 1961</bibRefCitation>
;
<bibRefCitation id="17C6510EA9F6D7F8822715E673A12000" author="Ronneberger" firstAuthor="Ronneberger" issue="3" journalOrPublisher="Limnologica" pagination="323-419" refId="B94" refString="Ronneberger D (1975) Zur Kenntnis der Grundwasserfauna des Saale-Einzugsgebietes (Thüringen). Limnologica 9 (3): 323419." title="Zur Kenntnis der Grundwasserfauna des Saale-Einzugsgebietes (Thüringen)." volume="9" year="1975">Ronneberger 1975</bibRefCitation>
;
<bibRefCitation id="7D0F37BDCFFD57C5A13188F2BC136F0A" author="Ball and Reynoldson" firstAuthor="Ball" journalOrPublisher="Cambridge University Press, London" refId="B10" refString="Ball IR, Reynoldson RB (1981) British Planarians. Platyhelminthes: Tricladida. Key and notes for the identification of the species. Synopses of the British Fauna 19. Cambridge University Press, London, 141 pp." title="British Planarians. Platyhelminthes: Tricladida. Key and notes for the identification of the species. Synopses of the British Fauna 19." year="1981">Ball and Reynoldson 1981</bibRefCitation>
;
<bibRefCitation id="A14776D348793296D9CBA211009C30C8" author="Muller and Faubel" firstAuthor="Muller" pagination="363-396" refId="B73" refString="Müller D, Faubel A (1993) The Turbellaria of the River Elbe Estuary. A faunistic analysis of oligohaline and limnic areas. Archiv für Hydrobiologie Suppl. 75: 363396." title="The Turbellaria of the River Elbe Estuary. A faunistic analysis of oligohaline and limnic areas. Archiv für Hydrobiologie Suppl." volume="75" year="1993">Müller and Faubel 1993</bibRefCitation>
;
<bibRefCitation id="FF16E064EF755B886A80744214BA6051" DOI="10.1899/11-092.1" author="Martin and Brunke" firstAuthor="Martin" issue="2" journalOrPublisher="Freshwater Science" pagination="542-562" refId="B70" refString="Martin P, Brunke M (2012) Faunal typology of lowland springs in northern Germany. Freshwater Science 31 (2): 542562. https://doi.org/10.1899/11-092.1" title="Faunal typology of lowland springs in northern Germany." volume="31" year="2012">Martin and Brunke 2012</bibRefCitation>
), East Europe (
<collectingCountry id="1566805F6409173DEAEDB92A1AE92071" name="Estonia">Estonia</collectingCountry>
,
<collectingCountry id="D80A91F68F81FC361EEE61005EAF8409" name="Latvia">Latvia</collectingCountry>
, Littauen,
<collectingCountry id="AB1545CB4A958B250ED7FFAA3E84D899" name="Ukraine">Ukraine</collectingCountry>
,
<collectingCountry id="82C37BD0BC80B00E3BDF3F31B401E013" name="Poland">Poland</collectingCountry>
, and
<collectingCountry id="7067D53B6DA628DC166220B4E43303AB" name="Czech Republic">Czech Republic</collectingCountry>
) (
<bibRefCitation id="0B76E95DBB086327DD1F8543D3B11E25" author="Luther" firstAuthor="Luther" journalOrPublisher="Fauna Fennica" pagination="1-42" refId="B62" refString="Luther A (1961) Die Turbellarien Ostfennoskandiens 2. Tricladida. Fauna Fennica 11: 142." title="Die Turbellarien Ostfennoskandiens 2. Tricladida." volume="11" year="1961">Luther 1961</bibRefCitation>
;
<bibRefCitation id="82BFB82C6A3A32A7A43CF1A2A6C528CC" author="Pinchuk" firstAuthor="Pinchuk" refId="B86" refString="Pinchuk VI (1979) A planarian species Tricladida Paludicola from the Dnieper River Delta Ukrainian-SSR New for the Fauna of the USSR. Vestnik Zoologii 6: 86." year="1979">Pinchuk 1979</bibRefCitation>
), and
<collectingCountry id="3FFD10AD28E19FFE8B6A39F1D92F91CE" name="Russia">Russia</collectingCountry>
(
<bibRefCitation id="2BE72B9B17713E45B617723EF1BAAE41" author="Grimm" firstAuthor="Grimm" journalOrPublisher="Petersburg Gesellschaft der Naturforscher" pagination="1-32" refId="B38" refString="Grimm AO (1877) Zur Kenntnis der Fauna des Ostsee. Arbeiten St. Petersburg Gesellschaft der Naturforscher 8: 132." title="Zur Kenntnis der Fauna des Ostsee. Arbeiten St." volume="8" year="1877">Grimm 1877</bibRefCitation>
;
<bibRefCitation id="0B5233839DB209CF632F7C22D3AB4407" author="Luther" firstAuthor="Luther" journalOrPublisher="Fauna Fennica" pagination="1-42" refId="B62" refString="Luther A (1961) Die Turbellarien Ostfennoskandiens 2. Tricladida. Fauna Fennica 11: 142." title="Die Turbellarien Ostfennoskandiens 2. Tricladida." volume="11" year="1961">Luther 1961</bibRefCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="SECID0EOHDK" type="material">
<paragraph id="003486480AFDAE8D69D2C5BF0E72C8AF">
<heading id="546DF802FD92A862595C28CE4837BF38" reason="title">Material.</heading>
</paragraph>
<paragraph id="AD50219BFDFD95C490EBC203A48B15E7">
<specimenCount id="A981761B31AD1FD90AB95DB30307EEDD" count="6" type="generic">Six specimens</specimenCount>
studied alive and preserved in absolute ethanol for future molecular analyses; one collected in Wandse river, submerged vegetation with organic matter,
<quantity id="D6D161BE12170B65AC1133E5920940C8" metricMagnitude="-1" metricUnit="m" metricValue="1.0" unit="m" value="0.1">0.1 m</quantity>
deep; one in Planten un Blomen park, submerged litter,
<quantity id="E06565344FC318368A39A3B1F4BDCBD2" metricMagnitude="-1" metricUnit="m" metricValue="3.0" unit="m" value="0.3">0.3 m</quantity>
deep; and four in Kirchwerder-Fünfhausen, submerged vegetation and litter in an irrigation channel,
<quantity id="43A62115B2B9F09E7CC73D03200D1415" metricMagnitude="-1" metricUnit="m" metricValue="1.5" metricValueMax="2.0" metricValueMin="1.0" unit="m" value="0.15" valueMax="0.2" valueMin="0.1">0.10.2 m</quantity>
deep.
</paragraph>
</subSubSection>
<subSubSection id="SECID0ETHDK" type="remarks">
<paragraph id="4310D15E609315F8D978E5DF3B3873F6">
<heading id="FF6B3D0DD2D1B728FB061198C8641FA2" reason="title">Remarks.</heading>
</paragraph>
<paragraph id="8BF7CDD11FECC0EDB4BDFAA55A6D9CFD">
Live adult specimens measuring
<quantity id="91028824FBC1CFB4E4AF01D5BF6D468B" metricMagnitude="-2" metricUnit="m" metricValue="1.0" metricValueMax="1.5" metricValueMin="0.5" unit="cm" value="1.0" valueMax="1.5" valueMin="0.5">0.51.5 cm</quantity>
, dark pigmented, with a pair of anterior eyes (Fig.
<figureCitation id="7C60D333FA7D4E4D94214C70F6E376E1" captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Planaria torva. A. Habitus of swimming specimen; B D. Squeezed specimen." httpUri="https://binary.pensoft.net/fig/1203026">13 A C</figureCitation>
: e). Squeezed specimens show the pharynx and atrial organs. The pharynx (Fig.
<figureCitation id="506E5A2AE26439D1F101378A6D9620DE" captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Planaria torva. A. Habitus of swimming specimen; B D. Squeezed specimen." httpUri="https://binary.pensoft.net/fig/1203026">13 C, D</figureCitation>
: ph) is located in the second body half and the mouth opens anterior to the male copulatory organ (Fig.
<figureCitation id="FD40152A58648990B632E035A7B87A06" captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Planaria torva. A. Habitus of swimming specimen; B D. Squeezed specimen." httpUri="https://binary.pensoft.net/fig/1203026">13 A, C, D</figureCitation>
: mco). The seminal ducts form false seminal vesicles (Fig.
<figureCitation id="D2BA3D44D16997B131A871BE913E4B48" captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Planaria torva. A. Habitus of swimming specimen; B D. Squeezed specimen." httpUri="https://binary.pensoft.net/fig/1203026">13 A, C, D</figureCitation>
: fsv) beside the anterior part of the pharynx. The male copulatory organ receives medially, independently, both seminal ducts, which evacuate the sperm in a single proximal seminal vesicle. Distally, the bulb forms a muscular penial papilla. One adenodactyl (Fig.
<figureCitation id="C79C4D110438A10DD2CEE613BD0041FA" captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Planaria torva. A. Habitus of swimming specimen; B D. Squeezed specimen." httpUri="https://binary.pensoft.net/fig/1203026">13 C, D</figureCitation>
: ad) opens into the common atrium, at the right side of the male bulb; it is oriented backwards. The adenodactyl is distally bent and the central lumen makes it look hollow. The single observed structure of the female system was the bursa (Fig.
<figureCitation id="55F5E397232CF2A383EB6512C7EC9DDF" captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Planaria torva. A. Habitus of swimming specimen; B D. Squeezed specimen." httpUri="https://binary.pensoft.net/fig/1203026">13 D</figureCitation>
: b), located to the right side of the male organ.
</paragraph>
<caption id="DA5590FD1EB0531626A0340837DC79AA" ID-arpha="B771B89B-D420-528A-9A13-D91610F771D2" httpUri="https://binary.pensoft.net/fig/1203026" startId="F13">
<paragraph id="4D5F1A0A4A8727EDFAF950274B715A2B">
<label id="EEFA4CB1193912A79F2859D55840C47F">Figure 13.</label>
</paragraph>
<paragraph id="93C32F302112EFF10D29D10789D2046D">
<taxonomicName id="0C7FAC6E5C7EB89922578DD2869F2408" authorityName="Muller" authorityYear="1776" baseAuthorityName="Muller" baseAuthorityYear="1773" family="Planariidae" genus="Planaria" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="torva">
<emphasis id="6C9ADD50F778D6003906AEB652B04B47" italics="true">Planaria torva</emphasis>
</taxonomicName>
.
<emphasis id="B959D2527146B1ABF836B8CA4639EBBA" bold="true">A.</emphasis>
Habitus of swimming specimen;
<emphasis id="E1D8C853FAB93E6F7FA76237C7B7AEC2" bold="true">B D.</emphasis>
Squeezed specimen.
</paragraph>
</caption>
<paragraph id="1993EA2332B2D6393037E6120B0C0CCC">
<taxonomicName id="31879B9844927A31839A789BC2CEBC3F" authorityName="Muller" authorityYear="1776" baseAuthorityName="Muller" baseAuthorityYear="1773" family="Planariidae" genus="Planaria" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="torva">
<emphasis id="1C4E679704E65D453B24834B85F66423" italics="true">Planaria torva</emphasis>
</taxonomicName>
is a species widely distributed throughout West Europe, and it is frequently mentioned in taxonomic literature on triclads in the region. However, accurate identification of this species can be challenging without a detailed examination of internal morphology. The taxonomic history of
<taxonomicName id="F3CF4CD4D7DD397D405B8DD0F5120EE3" authorityName="Muller" authorityYear="1776" baseAuthorityName="Muller" baseAuthorityYear="1773" family="Planariidae" genus="Planaria" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="torva">
<emphasis id="21D3AE3BC7374BBD1F11E806702DA965" italics="true">P. torva</emphasis>
</taxonomicName>
has been contentious, with several studies mistakenly associating it with species of
<taxonomicName id="F4343A75603B00D850701B4C2C47ACB9" authority="(Ball et al. 1969)" baseAuthorityName="Ball" baseAuthorityYear="1969" family="Dugesiidae" genus="Dugesia" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="genus">
<emphasis id="129AE8EFA61596414E4684C7C48A0D64" italics="true">Dugesia</emphasis>
(
<bibRefCitation id="A69E6AFE3B0F5BD8FE4B815E5B1AC42E" DOI="10.1111/j.1469-7998.1969.tb01691.x" author="Ball" etAl="et al." firstAuthor="Ball" journalOrPublisher="Journal of Zoology, London" pagination="99-123" refId="B11" refString="Ball IR, Reynoldson TB, Warwick T (1969) The taxonomy, habitat and distribution of the freshwater triclad Planaria torva (Plathelminthes: Turbellaria) in Britain. Journal of Zoology, London 157: 99123. https://doi.org/10.1111/j.1469-7998.1969.tb01691.x" title="The taxonomy, habitat and distribution of the freshwater triclad Planaria torva (Plathelminthes: Turbellaria) in Britain." volume="157" year="1969">Ball et al. 1969</bibRefCitation>
)
</taxonomicName>
. In light of these issues, we based the identification of our specimens on descriptions provided by
<bibRefCitation id="1D3378EA1AFAC8B727BD4743BF14FF0E" author="Luther A" firstAuthor="Luther" journalOrPublisher="Fauna Fennica" pagination="1-42" refId="B62" refString="Luther A (1961) Die Turbellarien Ostfennoskandiens 2. Tricladida. Fauna Fennica 11: 142." title="Die Turbellarien Ostfennoskandiens 2. Tricladida." volume="11" year="1961">Luther (1961)</bibRefCitation>
and
<bibRefCitation id="089ADDEA4D5127E4EB9342BA6F77F33D" DOI="10.1111/j.1469-7998.1969.tb01691.x" author="Ball IR &amp; Reynoldson TB &amp; Warwick T" etAl="et al." firstAuthor="Ball" journalOrPublisher="Journal of Zoology, London" pagination="99-123" refId="B11" refString="Ball IR, Reynoldson TB, Warwick T (1969) The taxonomy, habitat and distribution of the freshwater triclad Planaria torva (Plathelminthes: Turbellaria) in Britain. Journal of Zoology, London 157: 99123. https://doi.org/10.1111/j.1469-7998.1969.tb01691.x" title="The taxonomy, habitat and distribution of the freshwater triclad Planaria torva (Plathelminthes: Turbellaria) in Britain." volume="157" year="1969">Ball et al. (1969)</bibRefCitation>
. The presence of an adenodactyl serves as a key distinguishing feature between our studied specimens of
<taxonomicName id="4D4A6470B113AEA86C54B80A3FCDF1BC" authorityName="Muller" authorityYear="1776" baseAuthorityName="Muller" baseAuthorityYear="1773" family="Planariidae" genus="Planaria" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="torva">
<emphasis id="C78BBEB3B8997B414F9E226611D9BEB4" italics="true">P. torva</emphasis>
</taxonomicName>
and species of
<taxonomicName id="54249FEF6C75D467E289E4D62F0EB868" authority="(Luther 1961)" baseAuthorityName="Luther" baseAuthorityYear="1961" family="Dugesiidae" genus="Dugesia" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="genus">
<emphasis id="50277577766FA945F682EC602570EAEF" italics="true">Dugesia</emphasis>
(
<bibRefCitation id="07016DD8AABA2D513B86CB3EA72CBA46" author="Luther" firstAuthor="Luther" journalOrPublisher="Fauna Fennica" pagination="1-42" refId="B62" refString="Luther A (1961) Die Turbellarien Ostfennoskandiens 2. Tricladida. Fauna Fennica 11: 142." title="Die Turbellarien Ostfennoskandiens 2. Tricladida." volume="11" year="1961">Luther 1961</bibRefCitation>
)
</taxonomicName>
. Furthermore, the overall structure of the atrial organs in our specimens, particularly the male bulb and the adenodactyl, unequivocally supports their classification within
<taxonomicName id="B400578EA93ACEF30F4AF12BCDC20889" authorityName="Muller" authorityYear="1776" baseAuthorityName="Muller" baseAuthorityYear="1773" family="Planariidae" genus="Planaria" kingdom="Animalia" order="Tricladida" phylum="Platyhelminthes" rank="species" species="torva">
<emphasis id="BAA677AA76EE0A4B7730E86E1D08B0CB" italics="true">P. torva</emphasis>
</taxonomicName>
. For a more comprehensive comparison of this species with related congeners, refer to
<bibRefCitation id="43D9B3C75D7878625F670E00D3C989CD" DOI="10.1111/j.1469-7998.1969.tb01691.x" author="Ball IR &amp; Reynoldson TB &amp; Warwick T" etAl="et al." firstAuthor="Ball" journalOrPublisher="Journal of Zoology, London" pagination="99-123" refId="B11" refString="Ball IR, Reynoldson TB, Warwick T (1969) The taxonomy, habitat and distribution of the freshwater triclad Planaria torva (Plathelminthes: Turbellaria) in Britain. Journal of Zoology, London 157: 99123. https://doi.org/10.1111/j.1469-7998.1969.tb01691.x" title="The taxonomy, habitat and distribution of the freshwater triclad Planaria torva (Plathelminthes: Turbellaria) in Britain." volume="157" year="1969">Ball et al. (1969)</bibRefCitation>
.
</paragraph>
</subSubSection>
</treatment>
</document>

View file

@ -0,0 +1,297 @@
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<subSubSection id="373B73B5B6FCF855275C61B653B10A71" type="nomenclature">
<paragraph id="A7F70B00484EA2AE8C95BAFBA1FD66E8">
<taxonomicName id="6E7AF0A96ED04054F7E0FD48553FE558" authority="Schultze, 1851" authorityName="Schultze" authorityYear="1851" family="Prorhynchidae" genus="Prorhynchus" kingdom="Animalia" order="Catenulida" phylum="Platyhelminthes" rank="species" species="stagnalis">
<emphasis id="81A377E01F8951A1B8115AA8566F9294" italics="true">Prorhynchus stagnalis</emphasis>
<bibRefCitation id="D681B47F8B0543AA232077F19365DB9E" author="Schultze MS" journalOrPublisher="Kochs Verlagsjandlung, Greifswald" refId="B100" refString="Schultze MS (1851) Beitrage zur Naturgeschichte der Turbellarien. C. A. Koch's Verlagsjandlung, Greifswald, 78 pp." title="Beitrage zur Naturgeschichte der Turbellarien. C. A." year="1851">Schultze, 1851</bibRefCitation>
</taxonomicName>
</paragraph>
</subSubSection>
<subSubSection id="414966994585B34C77BF91BC3D46EC08" type="description">
<paragraph id="FC4DA81069D4FE8765AEBB570F7A5A91">
<figureCitation id="96E8AD2FC005CDC26FA0995BFA2FDCF4" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Prorhynchus stagnalis. A. Habitus of a swimming specimen; B D. Anterior part of the body; E, F. Sclerotised structures. Abbreviations: br brain; eb external bars; i intestine; ib internal bars; ov ovary; ph pharynx; phg pharyngeal glands; pv prostate vesicle; st stylet. Scale bars: 200 μm (A); 100 μm (B D); 50 μm (E, F)." httpUri="https://binary.pensoft.net/fig/1203017">Fig. 4</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="SECID0EIGBK" type="distribution">
<paragraph id="96B16C64C2D4087C04DCCB7F1E3DB441">
<heading id="B3EDA56CF3F7341FB48222220D385CD7" reason="title">Known distribution.</heading>
</paragraph>
<paragraph id="7D037BAF138DB33D342E471E401F399C">
Species with a worldwide distribution, recorded from South America (
<collectingCountry id="330D3503CCBB5773736C3C04F07D2B36" name="Brazil">Brazil</collectingCountry>
) (
<bibRefCitation id="6F883F0EE96CD53EDCC7A1BE3F782DF9" author="Marcus" firstAuthor="Marcus" issue="1" journalOrPublisher="Arquivos do Museu Paranaense" pagination="1-46" refId="B65" refString="Marcus E (1944) Sobre duas prorhynchidae (Turbellaria), novas para o Brasil. Arquivos do Museu Paranaense 4 (1): 146." title="Sobre duas prorhynchidae (Turbellaria), novas para o Brasil." volume="4" year="1944">Marcus 1944</bibRefCitation>
;
<bibRefCitation id="3EA0E121D079365BA6FB18AF35543F54" DOI="10.6620%2FZS.2021.60-22" author="Reyes" etAl="et al." firstAuthor="Reyes" refId="B89" refString="Reyes J, Binow D, Vianna RT, Brusa F, Martins SE (2021) Free-living microturbellarians (Platyhelminthes) from wetlands in Southern Brazil, with the description of three new species. Zoological Studies 60: 22. https://doi.org/10.6620%2FZS.2021.60-22" year="2021">Reyes et al. 2021</bibRefCitation>
), North America (Unite States) (
<bibRefCitation id="7C13FD50CA4846D69DD194ED6DACDC1B" DOI="10.5962/bhl.title.16785" author="Higley" firstAuthor="Higley" journalOrPublisher="Zoological Laboratory of the University of Illinois: Illinois Biological Monographs" pagination="1-95" refId="B42" refString="Higley R (1918) Morphology and biology of some Turbellaria from the Mississsippi basin. Zoological Laboratory of the University of Illinois: Illinois Biological Monographs 4: 195. https://doi.org/10.5962/bhl.title.16785" title="Morphology and biology of some Turbellaria from the Mississsippi basin." volume="4" year="1918">Higley 1918</bibRefCitation>
;
<bibRefCitation id="7C3A7EC037E21EEC1CA8CE0BECB5FF29" author="Kenk" firstAuthor="Kenk" journalOrPublisher="Miscellaneous Publications, Museum of Zoology, University of Michigan" pagination="1-66" refId="B49" refString="Kenk R (1949) The animal life of temporary and permanent ponds in southern Michigan. Miscellaneous Publications, Museum of Zoology, University of Michigan 71: 166." title="The animal life of temporary and permanent ponds in southern Michigan." volume="71" year="1949">Kenk 1949</bibRefCitation>
;
<bibRefCitation id="10B5BDBEA57B38A082CC37F6B95DD308" DOI="10.2307/1467222" author="Kolasa" etAl="et al." firstAuthor="Kolasa" issue="2" journalOrPublisher="Journal of the North American Benthological Society" pagination="125-132" refId="B52" refString="Kolasa J, Strayer D, Bannon-ODonnell E (1987) Microturbellarians from interstitial waters, streams, and springs in southeastern New York. Journal of the North American Benthological Society 6 (2): 125132. https://doi.org/10.2307/1467222" title="Microturbellarians from interstitial waters, streams, and springs in southeastern New York." volume="6" year="1987">Kolasa et al. 1987</bibRefCitation>
;
<bibRefCitation id="EE173534C5382728B17FF00156F01678" DOI="10.1007/BF00006581" author="Smith" firstAuthor="Smith" journalOrPublisher="Hydrobiologia" pagination="255-265" refId="B103" refString="Smith DG (1991) On some larger turbellarian worms (Platyhelminthes) living in temporary fresh waters of Southern New England. Hydrobiologia 220: 255265. https://doi.org/10.1007/BF00006581" title="On some larger turbellarian worms (Platyhelminthes) living in temporary fresh waters of Southern New England." volume="220" year="1991">Smith 1991</bibRefCitation>
;
<bibRefCitation id="539B96C92D6A32E45BF13305B64B01EE" DOI="10.31753/SPQQ6001_188" author="Glasgow" firstAuthor="Glasgow" issue="3" journalOrPublisher="Journal of the Mississippi Academy of Sciences" pagination="188-198" refId="B35" refString="Glasgow B (2021) Some land planarians and freshwater turbellarians (Platyhelminthes) from Mississippi, USA. Journal of the Mississippi Academy of Sciences 66 (3): 188198. https://doi.org/10.31753/SPQQ6001_188" title="Some land planarians and freshwater turbellarians (Platyhelminthes) from Mississippi, USA." volume="66" year="2021">
<collectingRegion id="037CAFF998725893CC7C21CC92011652" country="United Kingdom" name="Glasgow City">Glasgow</collectingRegion>
2021
</bibRefCitation>
), Faroes Islands (
<bibRefCitation id="79561B8FC1517193A6344A7C72F8D06D" author="Steinbock" editor="Jensen S &amp; Lundbeck W &amp; Mortensen Th" firstAuthor="Steinbock" journalOrPublisher="Copenhagen" pagination="1-32" refId="B106" refString="Steinböck O (1931) Freshwater Turbellaria. In: Jensen S, Lundbeck W, Mortensen Th (Eds) Zoology of the Faroes. Copenhagen, 132." title="Freshwater Turbellaria." volumeTitle="Zoology of the Faroes." year="1931">Steinböck 1931</bibRefCitation>
), West Europe (
<collectingCountry id="CD800F4B8028DA9032B943DB0FC43858" name="United Kingdom">United Kingdom</collectingCountry>
,
<collectingCountry id="B9FBB63DF3A371BEAA0355F1219277CD" name="Ireland">Ireland</collectingCountry>
,
<collectingCountry id="01E030C3F094DF6AF77954FFFB3286C7" name="Sweden">Sweden</collectingCountry>
,
<collectingCountry id="177962AE8464A4A26B695D85E8535218" name="Belgium">Belgium</collectingCountry>
,
<collectingCountry id="247F904A7EAFFDA4FAFA16D0EBEA442D" name="Netherlands">Netherlands</collectingCountry>
;
<collectingCountry id="442069663BABF84238375EC56DF175E3" name="Germany">Germany</collectingCountry>
,
<collectingCountry id="BB226651B75DBACF2EECAF505501BFA6" name="Switzerland">Switzerland</collectingCountry>
,
<collectingCountry id="C05B8D9BF673A08E848E1D8C993BFF18" name="Austria">Austria</collectingCountry>
,
<collectingCountry id="0146FE453E864662BFF13CCD9CE38BD7" name="Poland">Poland</collectingCountry>
,
<collectingCountry id="C45EF2D630CC929528EF3282C060FA4A" name="Czech Republic">Czech Republic</collectingCountry>
,
<collectingCountry id="D07DF585B48B313023B24C6EE1E48061" name="France">France</collectingCountry>
,
<collectingCountry id="DBAB7B0F9075D76E29E77BC95F182FEE" name="Spain">Spain</collectingCountry>
) (
<bibRefCitation id="44BFCA85BDD31EF626C526BF2B348449" author="Schultze" firstAuthor="Schultze" journalOrPublisher="Kochs Verlagsjandlung, Greifswald" refId="B100" refString="Schultze MS (1851) Beitrage zur Naturgeschichte der Turbellarien. C. A. Kochs Verlagsjandlung, Greifswald, 78 pp." title="Beitrage zur Naturgeschichte der Turbellarien. C. A." year="1851">Schultze 1851</bibRefCitation>
;
<bibRefCitation id="534BD0841ED8A11F13454D2A8A3AB586" author="Graff" firstAuthor="Graff" journalOrPublisher="Verlag von Wilhelm Engelmann, Leipzig" refId="B36" refString="Graff L v (1882) Monographie der Turbellarien. I. Rhabdocoelida. Verlag von Wilhelm Engelmann, Leipzig, 441 pp." title="Monographie der Turbellarien. I. Rhabdocoelida." year="1882">Graff 1882</bibRefCitation>
,
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;
<bibRefCitation id="12A6DC5B028A27F8664D1FF2B325C2AA" DOI="10.5962/bhl.part.26336" author="Fuhrmann" firstAuthor="Fuhrmann" journalOrPublisher="Revue Suisse de Zoologie" pagination="215-289" refId="B31" refString="Fuhrmann O (1894) Die Turbellarienfauna der Umgebung von Basel. Revue Suisse de Zoologie 2: 215289. https://doi.org/10.5962/bhl.part.26336" title="Die Turbellarienfauna der Umgebung von Basel." volume="2" year="1894">Fuhrmann 1894</bibRefCitation>
,
<bibRefCitation id="C111AB77DC537C2AC3D40141B8A228A1" DOI="10.5962/bhl.part.32952" author="Fuhrmann" firstAuthor="Fuhrmann" journalOrPublisher="Revue Suisse de Zoologie" pagination="717-731" refId="B32" refString="Fuhrmann O (1900) Note sur les Turbellariés des environs de Genève. Revue Suisse de Zoologie 7: 717731. https://doi.org/10.5962/bhl.part.32952" title="Note sur les Turbellariés des environs de Genève." volume="7" year="1900">1900</bibRefCitation>
;
<bibRefCitation id="299EE1DC32A4D073B895A8A7C7F17CFF" author="Steinbock" firstAuthor="Steinbock" journalOrPublisher="Zoologischer Anzeiger" pagination="233-242" refId="B105" refString="Steinböck O (1923) Eine neue Gruppe allöocöler Turbellarien: Alloeocoela Typhlocoela (Familie Prorhynchidae). Zoologischer Anzeiger 58: 233242." title="Eine neue Gruppe allöocöler Turbellarien: Alloeocoela Typhlocoela (Familie Prorhynchidae)." volume="58" year="1923">Steinböck 1923</bibRefCitation>
;
<bibRefCitation id="53C2D8C0F28A618FC9556504E04B8E72" author="Southern" firstAuthor="Southern" refId="B104" refString="Southern R (1936) Turbellaria of Ireland. Proceedings of the Royal Irish Academy 43, 4372." year="1936">Southern 1936</bibRefCitation>
;
<bibRefCitation id="BAD95287BD35CBF2B9D9C58654325BA2" author="Rixen" firstAuthor="Rixen" issue="4" journalOrPublisher="Archive für Hydrobiologie" pagination="464-538" refId="B93" refString="Rixen J-U (1961) Kleinturbellarien aus dem Litoral der Binnengewässer Schleswig-Holsteins. Archive für Hydrobiologie 57 (4): 464538." title="Kleinturbellarien aus dem Litoral der Binnengewässer Schleswig-Holsteins." volume="57" year="1961">Rixen 1961</bibRefCitation>
;
<bibRefCitation id="6DFB93D05D7C03B3F53A8011D8C97827" author="Young" firstAuthor="Young" issue="2" journalOrPublisher="Archive für Hydrobiologie" pagination="210-241" refId="B121" refString="Young JO (1970) Britisch and Irish freshwater Microturbellaria: historical records, new records and a key for their identification. Archive für Hydrobiologie 67 (2): 210241." title="Britisch and Irish freshwater Microturbellaria: historical records, new records and a key for their identification." volume="67" year="1970">Young 1970</bibRefCitation>
,
<bibRefCitation id="0AD428FD324F6431A051794550D4109F" author="Young" firstAuthor="Young" journalOrPublisher="Zoologische Bijdragen" pagination="59-70" refId="B122" refString="Young JO (1972) The Turbellaria of some Friesland lakes with incidental records of Gasteropoda [sic] and Hirudinea. Zoologische Bijdragen 13: 5970." title="The Turbellaria of some Friesland lakes with incidental records of Gasteropoda [sic] and Hirudinea." volume="13" year="1972">1972</bibRefCitation>
,
<bibRefCitation id="2FEB503A170E2725BBAD6E66E9287C0B" author="Young" firstAuthor="Young" issue="2" journalOrPublisher="Archive für Hydrobiologie" pagination="202-224" refId="B123" refString="Young JO (1973) The occurrence of Microturbellaria in some British lakes of diverse chemical content. Archive für Hydrobiologie 72 (2): 202224." title="The occurrence of Microturbellaria in some British lakes of diverse chemical content." volume="72" year="1973">1973</bibRefCitation>
;
<bibRefCitation id="AE3FAED8978563938B432DC945D4D296" author="Kolasa" firstAuthor="Kolasa" issue="11" journalOrPublisher="Bulletin de lAcademie Polonaise des Science - Serie des Sciences Biologiques" pagination="743-747" refId="B51" refString="Kolasa J (1971) Two new species of Microturbellaria of the genera Stenostomum O. Schmidt and Macrostomum O. Schmidt. Bulletin de lAcademie Polonaise des Science - Serie des Sciences Biologiques 19 (11): 743747." title="Two new species of Microturbellaria of the genera Stenostomum O. Schmidt and Macrostomum O. Schmidt." volume="19" year="1971">Kolasa 1971</bibRefCitation>
; Farias et al. 1996;
<bibRefCitation id="184579E23E101527BB4B406726322A70" DOI="10.1080/00222930701526055" author="Norena" etAl="et al." firstAuthor="Norena" journalOrPublisher="Journal of Natural History" pagination="29-32" refId="B79" refString="Noreña C, Damborenea C, Faubel A, Brusa F (2007) Composition of meiobenthonic Platyhelminthes from brackish environments of the Galician and Cantabrian coasts of Spain with the description of a new species of Djeziraia (Polycystididae, Kalyptorhynchia). Journal of Natural History 41: 2932. https://doi.org/10.1080/00222930701526055" title="Composition of meiobenthonic Platyhelminthes from brackish environments of the Galician and Cantabrian coasts of Spain with the description of a new species of Djeziraia (Polycystididae, Kalyptorhynchia)." volume="41" year="2007">Noreña et al. 2007</bibRefCitation>
), East Europe (
<collectingCountry id="C083BAADAF2A46387EC8D7CEB5C4378E" name="Bulgaria">Bulgaria</collectingCountry>
,
<collectingCountry id="BB7DDBCD5960AE8C7631A34626A19C74" name="Hungary">Hungary</collectingCountry>
,
<collectingCountry id="3910769E2FF3DA128DAA02498621389C" name="Hungary">Hungary</collectingCountry>
, North Macedonia-Alvania,
<collectingCountry id="6D11F16C0F36DFA089A5B5388AE4804F" name="Russia">Russia</collectingCountry>
) (
<bibRefCitation id="61DDFCA5618B474F33998DA1282960DD" DOI="10.5962/bhl.title.1066" author="Graff" firstAuthor="Graff" journalOrPublisher="Friedländer und Sohn, Berlin" refId="B37" refString="Graff L v (1913) Das Tierreich: Turbellaria II. Rhabdocoelida (Vol. 35). Verlag von R. Friedländer und Sohn, Berlin, 484 pp. https://doi.org/10.5962/bhl.title.1066" title="Das Tierreich: Turbellaria II. Rhabdocoelida (Vol. 35). Verlag von R." year="1913">Graff 1913</bibRefCitation>
;
<bibRefCitation id="5A11EC445770A54715631EE0AF3B77C1" author="Steinbock" firstAuthor="Steinbock" refId="B107" refString="Steinböck O (1932) Die Turbellarien des arktischen Gebietes. Fauna Arctica 297342." year="1932">Steinböck 1932</bibRefCitation>
;
<bibRefCitation id="FE4E079E985A73F027A1A18D933F27B1" author="An der Lan" firstAuthor="An der Lan" issue="5-6" journalOrPublisher="Abhandlungen der Mathematisch-Naturwissenschaftlichen Klasse" pagination="195-254" refId="B2" refString="An der Lan H (1939) Zur rhabdocoelen Turbellarienfauna des Ochridasees (Balkan). Abhandlungen der Mathematisch-Naturwissenschaftlichen Klasse 148 (56): 195254." title="Zur rhabdocoelen Turbellarienfauna des Ochridasees (Balkan)." volume="148" year="1939">An der Lan 1939</bibRefCitation>
), Asia (
<collectingCountry id="DB6CE7826905357F236C2CF2064484A0" name="China">China</collectingCountry>
and
<collectingCountry id="59F1777D06B5D289AA94C20F12892D27" name="Japan">Japan</collectingCountry>
) (
<bibRefCitation id="7B4774EE8D71A4B4751AE835D37AEAE2" author="Okugawa" firstAuthor="Okugawa" journalOrPublisher="Kyoto Gakugei University, Series B," pagination="20-43" refId="B83" refString="Okugawa KI (1953) A monograph of Turbellaria (Acoela, Rhabdocoela, Alloeocoela and Tricladida) of Japan and its adjacent regions. Kyoto Gakugei University, Series B, 3: 2043." title="A monograph of Turbellaria (Acoela, Rhabdocoela, Alloeocoela and Tricladida) of Japan and its adjacent regions." volume="3" year="1953">Okugawa 1953</bibRefCitation>
;
<bibRefCitation id="AEA29D3E3F9F39A38518A02EE3575E2C" author="Peng" etAl="et al." firstAuthor="Peng" issue="2" journalOrPublisher="Acta Zootaxonomica Sinica" pagination="433-437" refId="B85" refString="Peng S, Liu XM, Wang AT, Qiu HL (2007) A newly recorded order of turbellarians with a newly recorded species from China (Lecithoepitheliata, Prorhynchidae). Acta Zootaxonomica Sinica 32 (2): 433437." title="A newly recorded order of turbellarians with a newly recorded species from China (Lecithoepitheliata, Prorhynchidae)." volume="32" year="2007">Peng et al. 2007</bibRefCitation>
), and Africa (
<collectingCountry id="FEB02844046D41182DBE2DA88E32361C" name="Kenya">Kenya</collectingCountry>
) (
<bibRefCitation id="CF6B767C892B2851E863E277843B543A" author="Young and Young" firstAuthor="Young" refId="B126" refString="Young JO, Young BM (1976) First records of eight species and new records of four species of freshwater Microturbellaria from East Africa, with comments on modes of dispersal of the group. Zoologischer Anzeiger 196 (1 / 2): 93108." year="1976">Young and Young 1976</bibRefCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="SECID0E1JBK" type="material">
<paragraph id="04B54F9F883419D185136AEE4A80C5F1">
<heading id="F470A055A66805B43E1F886BE77E2187" reason="title">Material.</heading>
</paragraph>
<paragraph id="9C3C017F2F3CB92B280719ED5D49E2F1">
<specimenCount id="2295FBB4C054850A1DE811A108063068" count="6" type="generic">Six specimens</specimenCount>
studied alive, two preserved in ethanol for future molecular analyses, four cut in two pieces, the anterior part containing the stylet for whole mounting (
<collectionCode id="BA526E7C67FD837F788A7DD28DB929D7" country="Germany" httpUri="http://grbio.org/cool/kdnf-0379" name="Zoologisches Museum Hamburg" type="Museum">ZMH</collectionCode>
<accessionNumber id="B80F8D876D077CF78BD2C926236CAB7C" httpUri="https://www.ebi.ac.uk/ena/browser/api/embl/V13839" type="EnaNcbi">
<collectionCode id="5FEA3073A96DB752B032D54B0E555086" country="Canada" lsid="urn:lsid:biocol.org:col:13946" name="Royal British Columbia Museum - Herbarium" type="Museum">V</collectionCode>
13839
</accessionNumber>
13842) and the posterior part preserved for molecular analyses; collected in Kirchwerder-Fünfhausen, submerged vegetation and litter in an irrigation channel,
<quantity id="B2AAE7F8B7D06825847E8BE14DE7E5C6" metricMagnitude="-1" metricUnit="m" metricValue="1.5" metricValueMax="2.0" metricValueMin="1.0" unit="m" value="0.15" valueMax="0.2" valueMin="0.1">0.10.2 m</quantity>
deep.
</paragraph>
</subSubSection>
<subSubSection id="SECID0E6JBK" type="remarks">
<paragraph id="09B75B1BE9485B0C65C22CD5042AB87F">
<heading id="C8207F01E0BE2BFF19BE72821EEF0536" reason="title">Remarks.</heading>
</paragraph>
<paragraph id="BF91F6EFABDA9D7E589B0240F7F15F9F">
Animals
<quantity id="8B41C0FBF32872A3C5F826B46CAFEC1D" metricMagnitude="-3" metricUnit="m" metricValue="3.0" metricValueMax="3.5" metricValueMin="2.5" unit="mm" value="3.0" valueMax="3.5" valueMin="2.5">2.53.5 mm</quantity>
long depending on the contraction stage, opaque, without eyes (Fig.
<figureCitation id="6F8B42F29CFD1979E0984C99D93C4DD2" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Prorhynchus stagnalis. A. Habitus of a swimming specimen; B D. Anterior part of the body; E, F. Sclerotised structures. Abbreviations: br brain; eb external bars; i intestine; ib internal bars; ov ovary; ph pharynx; phg pharyngeal glands; pv prostate vesicle; st stylet. Scale bars: 200 μm (A); 100 μm (B D); 50 μm (E, F)." httpUri="https://binary.pensoft.net/fig/1203017">4 A</figureCitation>
). The oral pore opens at the anterior tip; the pharynx (Fig.
<figureCitation id="32BE42CD4C06F01D9D5C5434A48B791D" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Prorhynchus stagnalis. A. Habitus of a swimming specimen; B D. Anterior part of the body; E, F. Sclerotised structures. Abbreviations: br brain; eb external bars; i intestine; ib internal bars; ov ovary; ph pharynx; phg pharyngeal glands; pv prostate vesicle; st stylet. Scale bars: 200 μm (A); 100 μm (B D); 50 μm (E, F)." httpUri="https://binary.pensoft.net/fig/1203017">4 B, C</figureCitation>
: ph) is located behind the brain (Fig.
<figureCitation id="368010288DFB1FCB41F07F24BE2B2BE5" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Prorhynchus stagnalis. A. Habitus of a swimming specimen; B D. Anterior part of the body; E, F. Sclerotised structures. Abbreviations: br brain; eb external bars; i intestine; ib internal bars; ov ovary; ph pharynx; phg pharyngeal glands; pv prostate vesicle; st stylet. Scale bars: 200 μm (A); 100 μm (B D); 50 μm (E, F)." httpUri="https://binary.pensoft.net/fig/1203017">4 B</figureCitation>
: br) and beside the prostate vesicle (Fig.
<figureCitation id="C2C3AA038685F8D85E6F6BF6437D4F63" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Prorhynchus stagnalis. A. Habitus of a swimming specimen; B D. Anterior part of the body; E, F. Sclerotised structures. Abbreviations: br brain; eb external bars; i intestine; ib internal bars; ov ovary; ph pharynx; phg pharyngeal glands; pv prostate vesicle; st stylet. Scale bars: 200 μm (A); 100 μm (B D); 50 μm (E, F)." httpUri="https://binary.pensoft.net/fig/1203017">4 B, C</figureCitation>
: pv), and proximally opens into the intestine (Fig.
<figureCitation id="A66C7E7835DA62F3AD932171A89D6176" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Prorhynchus stagnalis. A. Habitus of a swimming specimen; B D. Anterior part of the body; E, F. Sclerotised structures. Abbreviations: br brain; eb external bars; i intestine; ib internal bars; ov ovary; ph pharynx; phg pharyngeal glands; pv prostate vesicle; st stylet. Scale bars: 200 μm (A); 100 μm (B D); 50 μm (E, F)." httpUri="https://binary.pensoft.net/fig/1203017">4 A</figureCitation>
: i). The intestine of some specimens contained numerous chaetae of oligochaetes; a feeding behaviour previously recorded to the species (Tylet et al. 2018).
</paragraph>
<caption id="8D742A3F4259DDD8DD115FEB4B579FB8" ID-arpha="74240AB2-5F58-528A-ADAC-18C1D664130F" httpUri="https://binary.pensoft.net/fig/1203017" startId="F4">
<paragraph id="C9356C94FF255750A9980DFEC0C45DC1">
<label id="F3708892176DB1A2B0D58AEA1700F9EF">Figure 4.</label>
</paragraph>
<paragraph id="BBAA3A4271A33DE548F0BDDD2D484702">
<taxonomicName id="58DA6E8BFF5999EE9F216682A85D7ACC" authorityName="Schultze" authorityYear="1851" family="Prorhynchidae" genus="Prorhynchus" kingdom="Animalia" order="Prorhynchida" phylum="Platyhelminthes" rank="species" species="stagnalis">
<emphasis id="0368A0CD553DFAAEE14B929EFFDEFB8A" italics="true">Prorhynchus stagnalis</emphasis>
</taxonomicName>
.
<emphasis id="9FB50EB51E4300B3D02C541EDE17D4F0" bold="true">A.</emphasis>
Habitus of a swimming specimen;
<emphasis id="2665C7EF27379AB79459CF1B095D79A0" bold="true">B D.</emphasis>
Anterior part of the body;
<emphasis id="6F8AEA88A540F76F61CEF9A1154E60DD" bold="true">E, F.</emphasis>
Sclerotised structures. Abbreviations:
<emphasis id="0B90DDF673FBC9B0AFC4B0E26CCB858A" bold="true">br</emphasis>
brain;
<emphasis id="F0D3A2F96C359E548F6551F9B2B632AC" bold="true">eb</emphasis>
external bars;
<emphasis id="E0784DAE07555CDD7FAD707729459F9A" bold="true">i</emphasis>
intestine;
<emphasis id="D71BB6C30C53DFCC9755414C52B07C55" bold="true">ib</emphasis>
internal bars;
<emphasis id="7638FDAE4AF3258C77A510D371B023C0" bold="true">ov</emphasis>
ovary;
<emphasis id="76F36AFD9CDA9699EC7BA6BC2F1D7B11" bold="true">ph</emphasis>
pharynx;
<emphasis id="BBF6BB3C7A621B18459B24DCBCCAF174" bold="true">phg</emphasis>
pharyngeal glands;
<emphasis id="EE5298BDF140F5491F3F5025CAB1D30C" bold="true">pv</emphasis>
prostate vesicle;
<emphasis id="89DA653C7BAC494B5B1A77685A176F9C" bold="true">st</emphasis>
stylet. Scale bars: 200 μm (
<emphasis id="73F10B6A328677EC6AC73D0CA9BF9E06" bold="true">A</emphasis>
); 100 μm (
<emphasis id="C2E44EF50BF07052DE08957E58ED4A4E" bold="true">B D</emphasis>
); 50 μm (
<emphasis id="9423FD2C538C6B294D2D27ED31EB5C8A" bold="true">E, F</emphasis>
).
</paragraph>
</caption>
<paragraph id="17743A179962DCFDF0F864287C8E2E31">
The ovary (Fig.
<figureCitation id="A85872B16666836FE9459567763A31D5" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Prorhynchus stagnalis. A. Habitus of a swimming specimen; B D. Anterior part of the body; E, F. Sclerotised structures. Abbreviations: br brain; eb external bars; i intestine; ib internal bars; ov ovary; ph pharynx; phg pharyngeal glands; pv prostate vesicle; st stylet. Scale bars: 200 μm (A); 100 μm (B D); 50 μm (E, F)." httpUri="https://binary.pensoft.net/fig/1203017">4 A</figureCitation>
: ov) is very long and runs medially, extending over the posterior two thirds of the body; eggs were observed. The male reproductive system includes the large unpired testis, located at mid body; the seminal vesicle, located posterior to the pharynx; the prostate vesicle running beside the pharynx; and the armed copulatory organ. The prostate vesicle shows thick muscle walls, perforated by the necks of the extracapsular prostatic glands, containing a coarse-granular secretion. Proximally, the prostate vesicle looks empty, maybe because it contains a very fine secretion. A very large duct connects the prostate vesicle with the armed bulb.
</paragraph>
<paragraph id="5C6EA6D1EF43E7BE502C4EEBFFE001FD">
The armed male copulatory organ (Fig.
<figureCitation id="B46F40EA377A5B54DC9BA868788A34C5" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Prorhynchus stagnalis. A. Habitus of a swimming specimen; B D. Anterior part of the body; E, F. Sclerotised structures. Abbreviations: br brain; eb external bars; i intestine; ib internal bars; ov ovary; ph pharynx; phg pharyngeal glands; pv prostate vesicle; st stylet. Scale bars: 200 μm (A); 100 μm (B D); 50 μm (E, F)." httpUri="https://binary.pensoft.net/fig/1203017">4 D F</figureCitation>
) is located in the anterior part of the body, anterior to the brain. It consists of a central stylet (Fig.
<figureCitation id="3163273001BCDF7E785551D61BD69D0C" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Prorhynchus stagnalis. A. Habitus of a swimming specimen; B D. Anterior part of the body; E, F. Sclerotised structures. Abbreviations: br brain; eb external bars; i intestine; ib internal bars; ov ovary; ph pharynx; phg pharyngeal glands; pv prostate vesicle; st stylet. Scale bars: 200 μm (A); 100 μm (B D); 50 μm (E, F)." httpUri="https://binary.pensoft.net/fig/1203017">4 B, D F</figureCitation>
: st) surrounded by two concentrical rings of spines. The stylet is 6468 µm long (
<emphasis id="D469E95DEB896D7C0FCFE0FE122668DC" italics="true">x ̄</emphasis>
= 66 µm; n = 4), proximally funnel shaped and posteriorly tapering to the distal sharp tip. As described by
<bibRefCitation id="1DAD965B66CF540FAC85AB57582D6C57" DOI="10.1007/s00435-017-0382-7" author="Tyler S &amp; Varjabedian A &amp; Hamami E" etAl="et al." firstAuthor="Tyler" journalOrPublisher="Zoomorphology" pagination="19-29" refId="B115" refString="Tyler S, Varjabedian A, Hamami E (2018) Functional morphology of the venom apparatus of Prorhynchus stagnalis (Platyhelminthes, Lecithoepitheliata). Zoomorphology 137: 1929. https://doi.org/10.1007/s00435-017-0382-7" title="Functional morphology of the venom apparatus of Prorhynchus stagnalis (Platyhelminthes, Lecithoepitheliata)." volume="137" year="2018">Tyler et al. (2018)</bibRefCitation>
, the stylet consist of two pieces, clearly distinguishable in the posterior third of the stylet. In the distal area, only the sharp tip of the stylet (part of the inner tube) could be observed. The number of bars on each ring surrounding the stylet is difficult to observe; however, in
<specimenCount id="EC79E5CF0BCC933531B0931DB558D535" count="2" type="generic">two specimens</specimenCount>
it seems that there are 10 bars in the external and six in the internal ring. This pattern has also been identified in populations from the Unite States and
<collectingCountry id="06861DB92006CE16474F8959AD6F6694" name="Brazil">Brazil</collectingCountry>
(
<bibRefCitation id="FB26A4C858FCC15B2D01940BD0DA6527" DOI="10.1007/s00435-017-0382-7" author="Tyler" etAl="et al." firstAuthor="Tyler" journalOrPublisher="Zoomorphology" pagination="19-29" refId="B115" refString="Tyler S, Varjabedian A, Hamami E (2018) Functional morphology of the venom apparatus of Prorhynchus stagnalis (Platyhelminthes, Lecithoepitheliata). Zoomorphology 137: 1929. https://doi.org/10.1007/s00435-017-0382-7" title="Functional morphology of the venom apparatus of Prorhynchus stagnalis (Platyhelminthes, Lecithoepitheliata)." volume="137" year="2018">Tyler et al. 2018</bibRefCitation>
;
<bibRefCitation id="ABB31BAAC5FD623A23EC8AB61E63F7C6" DOI="10.6620%2FZS.2021.60-22" author="Reyes" etAl="et al." firstAuthor="Reyes" refId="B89" refString="Reyes J, Binow D, Vianna RT, Brusa F, Martins SE (2021) Free-living microturbellarians (Platyhelminthes) from wetlands in Southern Brazil, with the description of three new species. Zoological Studies 60: 22. https://doi.org/10.6620%2FZS.2021.60-22" year="2021">Reyes et al. 2021</bibRefCitation>
). The external bars (Fig.
<figureCitation id="B84D0DD902B2CFB1B23CE9885DDF7C45" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Prorhynchus stagnalis. A. Habitus of a swimming specimen; B D. Anterior part of the body; E, F. Sclerotised structures. Abbreviations: br brain; eb external bars; i intestine; ib internal bars; ov ovary; ph pharynx; phg pharyngeal glands; pv prostate vesicle; st stylet. Scale bars: 200 μm (A); 100 μm (B D); 50 μm (E, F)." httpUri="https://binary.pensoft.net/fig/1203017">4 D F</figureCitation>
: eb) are arched, 5357 µm long (
<emphasis id="0EE8AB81264F8AB758B066FB5B20A6A2" italics="true">x ̄</emphasis>
= 55 µm; n = 4), proximally broad and posteriorly taper to rounded tips. The internal bars (Fig.
<figureCitation id="FACCF516663B68397E50C8F362D517C4" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Prorhynchus stagnalis. A. Habitus of a swimming specimen; B D. Anterior part of the body; E, F. Sclerotised structures. Abbreviations: br brain; eb external bars; i intestine; ib internal bars; ov ovary; ph pharynx; phg pharyngeal glands; pv prostate vesicle; st stylet. Scale bars: 200 μm (A); 100 μm (B D); 50 μm (E, F)." httpUri="https://binary.pensoft.net/fig/1203017">4 D, F</figureCitation>
: ib) appear straight to slightly arched but the rest of their morphology is hardly distinguishable; they are 4753 µm long (
<emphasis id="EB750FAB6A52BFF9BB7BDEF4555F640F" italics="true">x ̄</emphasis>
= 50 µm; n = 4).
</paragraph>
<paragraph id="3E95E1B7266ECEA530C6A27D16EA5E91">
It has been proposed that
<taxonomicName id="60C0BA2ED4B1247AF1CE239DF4B5D617" authorityName="Schultze" authorityYear="1851" family="Prorhynchidae" genus="Prorhynchus" kingdom="Animalia" order="Prorhynchida" phylum="Platyhelminthes" rank="species" species="stagnalis">
<emphasis id="7F0DF125B7CBF26E1AAEBB1245FE22A2" italics="true">P. stagnalis</emphasis>
</taxonomicName>
comprises a complex of species primarily distinguished by variations in the morphology of male sclerotised structures. However, comprehensive morphological and molecular investigations are imperative to elucidate the taxonomy of this species group fully. Furthermore, extensive sampling is required, including the
<typeStatus id="A068763584DD57BD22A2EC6701E3BF4E">type</typeStatus>
locality of the species (Greifswald,
<collectingCountry id="EC64F1753A035F43C961469954755343" name="Germany">Germany</collectingCountry>
). The specimens we have examined exhibit the smallest stylet (~ 66 µm) compared to those documented in the literature from The Urals (100124 µm; Rogozin 2015), the
<collectingCountry id="D6897216F6877A762E96FAC621D455E2" name="United States of America">United States</collectingCountry>
(~ 90 µm;
<bibRefCitation id="007B3B3F517F764D041BE86AE4C63AA2" DOI="10.1007/s00435-017-0382-7" author="Tyler" etAl="et al." firstAuthor="Tyler" journalOrPublisher="Zoomorphology" pagination="19-29" refId="B115" refString="Tyler S, Varjabedian A, Hamami E (2018) Functional morphology of the venom apparatus of Prorhynchus stagnalis (Platyhelminthes, Lecithoepitheliata). Zoomorphology 137: 1929. https://doi.org/10.1007/s00435-017-0382-7" title="Functional morphology of the venom apparatus of Prorhynchus stagnalis (Platyhelminthes, Lecithoepitheliata)." volume="137" year="2018">Tyler et al. 2018</bibRefCitation>
), and
<collectingCountry id="45180FF8FDAAA332190570AC11A6322D" name="Brazil">Brazil</collectingCountry>
(~ 123 µm;
<bibRefCitation id="74D548862D8B828E40F9BA060DBCDCD8" DOI="10.6620%2FZS.2021.60-22" author="Reyes" etAl="et al." firstAuthor="Reyes" refId="B89" refString="Reyes J, Binow D, Vianna RT, Brusa F, Martins SE (2021) Free-living microturbellarians (Platyhelminthes) from wetlands in Southern Brazil, with the description of three new species. Zoological Studies 60: 22. https://doi.org/10.6620%2FZS.2021.60-22" year="2021">Reyes et al. 2021</bibRefCitation>
).
</paragraph>
</subSubSection>
</treatment>
</document>

View file

@ -0,0 +1,182 @@
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<mods:title id="CB142F788C69EE7C872BE83CEE088D36">Little neighbours in Hamburg: free-living aquatic flatworms (Platyhelminthes)</mods:title>
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<mods:namePart id="64EC8EE740C2B1D7E5BB6B60E86E17EF">Diez, Yander L.</mods:namePart>
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<mods:affiliation id="22D9F82A10586287DCD4A2E6B413367F">Museum of Nature Hamburg Zoology, Leibniz Institute for the Analysis of Biodiversity Change (LIB), Martin-Luther-King-Platz 3, D- 20146, Hamburg, Germany &amp; Research Group Zoology: Biodiversity and Toxicology, Centre for Environmental Sciences, Hasselt University, Universitaire Campus Gebouw D, B- 3590 Diepenbeek, Belgium</mods:affiliation>
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<mods:affiliation id="F7583D614C8B250EC1DE4C5CE5A07837">Museum of Nature Hamburg Zoology, Leibniz Institute for the Analysis of Biodiversity Change (LIB), Martin-Luther-King-Platz 3, D- 20146, Hamburg, Germany</mods:affiliation>
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<subSubSection id="7F7D5EE74589B17525B3050A76E9ED83" type="nomenclature">
<paragraph id="7E9C165A7F930E022B7BB918B1F9F8C3">
<taxonomicName id="9299BA4845DCFAB93206501E46BD79FD" ID-CoL="525KL" authority="Larsson &amp; Willems, 2010" authorityName="Larssson &amp; Willems" authorityYear="2010" family="Stenostomidae" genus="Stenostomum" kingdom="Animalia" order="Catenulida" phylum="Platyhelminthes" rank="species" species="gotlandense">
<emphasis id="09915C51A4A3221A60F17B8C64D9D2CF" italics="true">Stenostomum gotlandense</emphasis>
<bibRefCitation id="7237336F8889E48A97610486153745E4" DOI="10.11646/zootaxa.2396.1.1" author="Larsson K &amp; Willems W" journalOrPublisher="Zootaxa" pagination="1-18" refId="B57" refString="Larsson K, Willems W (2010) Report on freshwater Catenulida (Platyhelminthes) from Sweden with the description of four new species. Zootaxa 2396: 1 - 18. https: // doi. org / 10.11646 / zootaxa. 2396.1. 1" title="Report on freshwater Catenulida (Platyhelminthes) from Sweden with the description of four new species." volume="2396" year="2010">Larsson &amp; Willems, 2010</bibRefCitation>
</taxonomicName>
</paragraph>
</subSubSection>
<subSubSection id="CA7DCB2C9D604E7149530699607CEFD1" type="description">
<paragraph id="5B8CF2A5B1C7B91BBD7F969730A500F0">
<figureCitation id="70BF08303BFA3E3179CAA8100F641D40" captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Stenostomum gotlandense. A. Habitus of a swimming specimen; B. Anterior part of the body; C. Anterior part of the body showing the brain; D. Posterior part of the body. Abbreviations: ab anterior brain; br brain; cp ciliated pits; ep excretophore; i intestine; m mouth; pb posterior brain; ph pharynx; pn protonephridia. Scale bars: 50 μm (A, C); 100 μm (B, D)." httpUri="https://binary.pensoft.net/fig/1203014">Fig. 1</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="SECID0EXNAK" type="distribution">
<paragraph id="47639922E7FD8EB2C19AC808BFFCB6D4">
<heading id="9488225DB1EDE45FF5BCC45451E5AEC2" reason="title">Known distribution.</heading>
</paragraph>
<paragraph id="22C114021B44E4A710050CAC622FAB86">
Species only known, until now, from
<collectingRegion id="59D86B945A9CCC2846865EEA9FC3D6B7" country="Sweden" name="Gotland">Gotland</collectingRegion>
,
<collectingCountry id="AE589939D46B5011B4D10A3385B88F3B" name="Sweden">Sweden</collectingCountry>
(
<bibRefCitation id="7B9549A664AAA81B4033086E0CA3E638" DOI="10.1016/j.ode.2008.09.003" author="Larsson" etAl="et al." firstAuthor="Larsson" journalOrPublisher="Organisms, Diversity &amp; Evolution" pagination="399-412" refId="B56" refString="Larsson K, Ahmadzadeh A, Jondelius U (2008) DNA taxonomy of Swedish Catenulida (Platyhelminthes) and a phylogenetic framework of catenulid classification. Organisms, Diversity &amp; Evolution 8: 399412. https://doi.org/10.1016/j.ode.2008.09.003" title="DNA taxonomy of Swedish Catenulida (Platyhelminthes) and a phylogenetic framework of catenulid classification." volume="8" year="2008">Larsson et al. 2008</bibRefCitation>
;
<bibRefCitation id="EAD384CF0E0B26616422EBCC9DA6D996" DOI="10.11646/zootaxa.2396.1.1" author="Larsson and Willems" firstAuthor="Larsson" journalOrPublisher="Zootaxa" pagination="1-18" refId="B57" refString="Larsson K, Willems W (2010) Report on freshwater Catenulida (Platyhelminthes) from Sweden with the description of four new species. Zootaxa 2396: 118. https://doi.org/10.11646/zootaxa.2396.1.1" title="Report on freshwater Catenulida (Platyhelminthes) from Sweden with the description of four new species." volume="2396" year="2010">Larsson and Willems 2010</bibRefCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="SECID0EFOAK" type="material">
<paragraph id="EB9A0C4368F5062FA0AD83F9D9F1591B">
<heading id="64436CB44D4872548FAFC32CE8E05AF8" reason="title">Material.</heading>
</paragraph>
<paragraph id="F5B7849EDB57EE70E0D53CE98528EC47">
<specimenCount id="868CAA5B6418DE803A31C71044E1988B" count="2" type="generic">Two specimens</specimenCount>
studied alive and stored in absolute ethanol for molecular analyses, one of them sequenced; collected in Kirchwerder-Fünfhausen, submerged vegetation and litter in an irrigation channel,
<quantity id="8785A1C6D9231FEAC020EB21209B1C12" metricMagnitude="-1" metricUnit="m" metricValue="1.5" metricValueMax="2.0" metricValueMin="1.0" unit="m" value="0.15" valueMax="0.2" valueMin="0.1">0.10.2 m</quantity>
deep.
</paragraph>
</subSubSection>
<subSubSection id="SECID0EKOAK" type="remarks">
<paragraph id="40E9B98B99835856FB853662DD2DF6CE">
<heading id="8A4F4EA49BC57FCF10469DB0F266EE18" reason="title">Remarks.</heading>
</paragraph>
<paragraph id="236242693F1E658D9E633D6698C1325E">
Specimens measuring 768957 µm long (
<emphasis id="F1C91DA90D650F8F3725961DE8D5DDC6" italics="true">x ̄</emphasis>
= 863 µm; n = 2) and 90110 µm at widest point (
<emphasis id="1D316ED632D37154F0438D6FB140DA5F" italics="true">x ̄</emphasis>
= 100 µm; n = 2), with two zooids, slender, tapering to both rounded extremes (Fig.
<figureCitation id="941587EF84F9190D98D755A723F9FFF0" captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Stenostomum gotlandense. A. Habitus of a swimming specimen; B. Anterior part of the body; C. Anterior part of the body showing the brain; D. Posterior part of the body. Abbreviations: ab anterior brain; br brain; cp ciliated pits; ep excretophore; i intestine; m mouth; pb posterior brain; ph pharynx; pn protonephridia. Scale bars: 50 μm (A, C); 100 μm (B, D)." httpUri="https://binary.pensoft.net/fig/1203014">1 A</figureCitation>
). The ciliated pits (Fig.
<figureCitation id="EBA8439D1C4FB6F3658D7322D7EB0A7A" captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Stenostomum gotlandense. A. Habitus of a swimming specimen; B. Anterior part of the body; C. Anterior part of the body showing the brain; D. Posterior part of the body. Abbreviations: ab anterior brain; br brain; cp ciliated pits; ep excretophore; i intestine; m mouth; pb posterior brain; ph pharynx; pn protonephridia. Scale bars: 50 μm (A, C); 100 μm (B, D)." httpUri="https://binary.pensoft.net/fig/1203014">1 B</figureCitation>
: cp) are relative short and open close to the most anterior part of the body. The epidermis is fully ciliated. Larger cilia are distributed along the body, particularly in the anterior and posterior ends. The brain (Fig.
<figureCitation id="AEB7B689853C03E000D2923043892560" captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Stenostomum gotlandense. A. Habitus of a swimming specimen; B. Anterior part of the body; C. Anterior part of the body showing the brain; D. Posterior part of the body. Abbreviations: ab anterior brain; br brain; cp ciliated pits; ep excretophore; i intestine; m mouth; pb posterior brain; ph pharynx; pn protonephridia. Scale bars: 50 μm (A, C); 100 μm (B, D)." httpUri="https://binary.pensoft.net/fig/1203014">1 B</figureCitation>
: br) consists of two pairs of lobes, the anterior brain (Fig.
<figureCitation id="E11500405DA582D80AC73552C3584465" captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Stenostomum gotlandense. A. Habitus of a swimming specimen; B. Anterior part of the body; C. Anterior part of the body showing the brain; D. Posterior part of the body. Abbreviations: ab anterior brain; br brain; cp ciliated pits; ep excretophore; i intestine; m mouth; pb posterior brain; ph pharynx; pn protonephridia. Scale bars: 50 μm (A, C); 100 μm (B, D)." httpUri="https://binary.pensoft.net/fig/1203014">1 C</figureCitation>
: ab) and the posterior brain (Fig.
<figureCitation id="1633E0DF2D8CDE74793A656E60EF7FA9" captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Stenostomum gotlandense. A. Habitus of a swimming specimen; B. Anterior part of the body; C. Anterior part of the body showing the brain; D. Posterior part of the body. Abbreviations: ab anterior brain; br brain; cp ciliated pits; ep excretophore; i intestine; m mouth; pb posterior brain; ph pharynx; pn protonephridia. Scale bars: 50 μm (A, C); 100 μm (B, D)." httpUri="https://binary.pensoft.net/fig/1203014">1 C</figureCitation>
: pb). We were not able to determine the exact number of compartments of the anterior brain, but in
<specimenCount id="2CE2919E21C129E30D139BCDDFFE0BE0" count="1" type="generic">one specimen</specimenCount>
there appear to exist seven. Refractile bodies not present. Proximal rim of the pharynx (Fig.
<figureCitation id="E28B515670C404197FABD3795B6A0938" captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Stenostomum gotlandense. A. Habitus of a swimming specimen; B. Anterior part of the body; C. Anterior part of the body showing the brain; D. Posterior part of the body. Abbreviations: ab anterior brain; br brain; cp ciliated pits; ep excretophore; i intestine; m mouth; pb posterior brain; ph pharynx; pn protonephridia. Scale bars: 50 μm (A, C); 100 μm (B, D)." httpUri="https://binary.pensoft.net/fig/1203014">1 A, B</figureCitation>
: ph) with a number of folds and surrounds the large mouth opening (Fig.
<figureCitation id="6B1F067671FEE0EBFC4AF413A31EDB9C" captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Stenostomum gotlandense. A. Habitus of a swimming specimen; B. Anterior part of the body; C. Anterior part of the body showing the brain; D. Posterior part of the body. Abbreviations: ab anterior brain; br brain; cp ciliated pits; ep excretophore; i intestine; m mouth; pb posterior brain; ph pharynx; pn protonephridia. Scale bars: 50 μm (A, C); 100 μm (B, D)." httpUri="https://binary.pensoft.net/fig/1203014">1 A, B</figureCitation>
: m). The protonephridium (Fig.
<figureCitation id="97ED8FBA54ACCC288A1F9D93F14A750B" captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Stenostomum gotlandense. A. Habitus of a swimming specimen; B. Anterior part of the body; C. Anterior part of the body showing the brain; D. Posterior part of the body. Abbreviations: ab anterior brain; br brain; cp ciliated pits; ep excretophore; i intestine; m mouth; pb posterior brain; ph pharynx; pn protonephridia. Scale bars: 50 μm (A, C); 100 μm (B, D)." httpUri="https://binary.pensoft.net/fig/1203014">1 D</figureCitation>
: pn) ends in a nephridiopore at the posterior end of the body.
</paragraph>
<caption id="2B5EC1374D9CB3B1B994F6BB7ED63E44" ID-arpha="62CFACC8-B9BA-5875-BB25-553426504D28" httpUri="https://binary.pensoft.net/fig/1203014" startId="F1">
<paragraph id="3343E01D36A4ACB0E5EA53877BFCE593">
<label id="A3B29AA964D26C88E60BB3C97095D345">Figure 1.</label>
</paragraph>
<paragraph id="ACCEB27B56F25B303CC2EFC56DB78789">
<taxonomicName id="A7FF964CAD6F7285AEA0819030A77EBC" authorityName="Larssson &amp; Willems" authorityYear="2010" family="Stenostomidae" genus="Stenostomum" kingdom="Animalia" phylum="Platyhelminthes" rank="species" species="gotlandense">
<emphasis id="06EC3EDA806A99AD9CBC3070468BF018" italics="true">Stenostomum gotlandense</emphasis>
</taxonomicName>
.
<emphasis id="A9A476F9E6CC411529D984D16717BA06" bold="true">A.</emphasis>
Habitus of a swimming specimen;
<emphasis id="3E1004A5FCE625251EEDAAD9E5C4BCDC" bold="true">B.</emphasis>
Anterior part of the body;
<emphasis id="E790BDEB653ABC6C98CDF54CF8814560" bold="true">C.</emphasis>
Anterior part of the body showing the brain;
<emphasis id="3C5E4E4F0340E3674012E607D5F2ABEF" bold="true">D.</emphasis>
Posterior part of the body. Abbreviations:
<emphasis id="C381374C1D93FB8082D1E02D1E0DC53C" bold="true">ab</emphasis>
anterior brain;
<emphasis id="809E006FB413F10BACA292B303434D27" bold="true">br</emphasis>
brain;
<emphasis id="C14CB4F2A02C22217D43C9F44F866021" bold="true">cp</emphasis>
ciliated pits;
<emphasis id="F65C2746140677D26C14CEFBF6282296" bold="true">ep</emphasis>
excretophore;
<emphasis id="A098378C7DAA1A148A12EC0634099856" bold="true">i</emphasis>
intestine;
<emphasis id="4477703EC63A196F21D52A1812F3EE86" bold="true">m</emphasis>
mouth;
<emphasis id="8DCB97AD98E70E3863C300C878E91297" bold="true">pb</emphasis>
posterior brain;
<emphasis id="CCBB436E53726E64F5A366598C558277" bold="true">ph</emphasis>
pharynx;
<emphasis id="4F1795531008999054028B000CA701FA" bold="true">pn</emphasis>
protonephridia. Scale bars: 50 μm (
<emphasis id="AA7C0A8577676CF14B40E14F7889764E" bold="true">A, C</emphasis>
); 100 μm (
<emphasis id="0A621E4B0FFB410C7362E9677B2EF4F7" bold="true">B, D</emphasis>
).
</paragraph>
</caption>
<paragraph id="FAFAD7E8E1A79A8E6FAA3741FD14A806">
As noted by
<bibRefCitation id="945F6EAA145EF97A16811A14A85AE312" DOI="10.11646/zootaxa.2396.1.1" author="Larsson K &amp; Willems W" firstAuthor="Larsson" journalOrPublisher="Zootaxa" pagination="1-18" refId="B57" refString="Larsson K, Willems W (2010) Report on freshwater Catenulida (Platyhelminthes) from Sweden with the description of four new species. Zootaxa 2396: 118. https://doi.org/10.11646/zootaxa.2396.1.1" title="Report on freshwater Catenulida (Platyhelminthes) from Sweden with the description of four new species." volume="2396" year="2010">Larsson and Willems (2010)</bibRefCitation>
, the folded rim of the pharynx, the large mouth opening, and the small ciliated pits represent a unique combination of morphological traits within
<taxonomicName id="819D6299921E7C9EE3C79A608C3789F6" authorityName="Schmidt" authorityYear="1848" family="Stenostomidae" genus="Stenostomum" kingdom="Animalia" phylum="Platyhelminthes" rank="genus">
<emphasis id="04DA60D84592BBDE64885119A50C4EEA" italics="true">Stenostomum</emphasis>
</taxonomicName>
. Our morphological identification is further corroborated by the phylogenetic analysis, leading us to confidently report this species for the first time in
<collectingCountry id="065C9F948168CB409435F036A8497BE3" name="Germany">Germany</collectingCountry>
, specifically in
<collectingRegion id="32E7611D42F3A7BAEDBE7C100FE71A9C" country="Germany" name="Hamburg">Hamburg</collectingRegion>
. The German specimens are similar in size, considering the length of the first zooid (495588 µm), to those from
<collectingCountry id="F415BD9E1D6BCC96B90A3B0FBAED8909" name="Sweden">Sweden</collectingCountry>
(500 µm). However,
<bibRefCitation id="BB95313EB3DA20E8EF44BE6FF3C0458C" DOI="10.11646/zootaxa.2396.1.1" author="Larsson K &amp; Willems W" firstAuthor="Larsson" journalOrPublisher="Zootaxa" pagination="1-18" refId="B57" refString="Larsson K, Willems W (2010) Report on freshwater Catenulida (Platyhelminthes) from Sweden with the description of four new species. Zootaxa 2396: 118. https://doi.org/10.11646/zootaxa.2396.1.1" title="Report on freshwater Catenulida (Platyhelminthes) from Sweden with the description of four new species." volume="2396" year="2010">Larsson and Willems (2010)</bibRefCitation>
observed that their specimens exhibited approximately 10 compartments in the anterior brain, whereas the specimens from Hamburg present about seven. Nonetheless,
<specimenCount id="61B52202345DFC0198B293503B01A645" count="1" type="generic">one specimen</specimenCount>
illustrated by
<bibRefCitation id="66FBB373C8947B2C74CD55C8D5B8E101" DOI="10.11646/zootaxa.2396.1.1" author="Larsson and Willems" firstAuthor="Larsson" journalOrPublisher="Zootaxa" pagination="1-18" refId="B57" refString="Larsson K, Willems W (2010) Report on freshwater Catenulida (Platyhelminthes) from Sweden with the description of four new species. Zootaxa 2396: 118. https://doi.org/10.11646/zootaxa.2396.1.1" title="Report on freshwater Catenulida (Platyhelminthes) from Sweden with the description of four new species." volume="2396" year="2010">Larsson and Willems (2010</bibRefCitation>
: fig. 3 B) shows only six segments in the anterior brain.
</paragraph>
</subSubSection>
</treatment>
</document>