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<document id="51E6FA6AFE5FEE449BC3CF373B3DADF4" ID-DOI="10.3897/zse.100.125042" ID-ZooBank="5E91BC1B-10CD-4E10-8B3A-0300757562D9" ID-publisher-id="125042" URI-arpha="680E18AA-B590-58B0-B25B-067ACAAF0328" URI-zoobank="http://zoobank.org/5E91BC1B-10CD-4E10-8B3A-0300757562D9" XM.bibliography_approvedBy="admin" XM.materialsCitations_approvedBy="admin" article-type="research-article" checkinTime="1731691790669" checkinUser="pensoft" docAuthor="Jimi, Naoto, Hookabe, Natsumi, Imura, Satoshi &amp; Diez, Yander L." docDate="2024" docId="C39A668E597E5A358BF2799B12B77496" docLanguage="en" docName="Zoosystematics and Evolution 100(4): 1585-1598" docOrigin="Zoosystematics and Evolution 100 (4)" docSource="https://zse.pensoft.net/article/125042/download/xml/" docStyle="DocumentStyle:PensoftTaxPub.0000.journal_article.generic" docStyleName="PensoftTaxPub.0000.journal_article.generic" docTitle="Proschizorhynchella quadricaudata Jimi, Hookabe, Imura &amp; Diez, 2024, sp. nov." docType="treatment" docUuid="29B3324A-5D36-4B51-93E0-A0792BB3BAE0" docUuidSource="ZooBank" docVersion="3" dtd-version="3.0" lastPageNumber="1598" masterDocId="680E18AAB59058B0B25B067ACAAF0328" masterDocTitle="Two new species of Schizorhynchia (Kalyptorhynchia, Rhabdocoela, Platyhelminthes) from Japan" masterLastPageNumber="1598" masterPageNumber="1585" pageNumber="1585" updateTime="1731694776574" updateUser="admin">
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<mods:title id="3CC93520ACFBB1E2D12067E9F23361C9">Two new species of Schizorhynchia (Kalyptorhynchia, Rhabdocoela, Platyhelminthes) from Japan</mods:title>
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<mods:namePart id="CF7C9A6BED51919A66AE05BA453637C5">Jimi, Naoto</mods:namePart>
<mods:nameIdentifier id="931DEE9C7B16A482B2132422E38C2684" type="ORCID">0000-0001-8586-3320</mods:nameIdentifier>
<mods:affiliation id="B2BC972C2AB49453FE48ABF3E00F84E4">Sugashima Marine Biological Laboratory, Graduate School of Science, Nagoya University, 429 - 63 Sugashima, Toba, Mie, 517 - 0004, Japan &amp; Centre for Marine &amp; Coastal Studies, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia</mods:affiliation>
</mods:name>
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<mods:namePart id="205BB4E5F71B69C575E723DACD28D39A">Hookabe, Natsumi</mods:namePart>
<mods:nameIdentifier id="CC70DEC4930EC8874B0AD7322A8C3AF1" type="ORCID">0000-0002-3498-8614</mods:nameIdentifier>
<mods:affiliation id="F967F3795D2895E0A797DC90C200A4FB">Research Institute for Global Change (RIGC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2 - 15 Natsushima-cho, Yokosuka, Kanagawa 237 - 0061, Japan</mods:affiliation>
</mods:name>
<mods:name id="8284D9470F5A716B8BE6B08F29C39C7B" type="personal">
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<mods:namePart id="5F3CCDCC14BA8D9CDC60E0648DFD0CDC">Imura, Satoshi</mods:namePart>
<mods:nameIdentifier id="F9E02D497F8D8929D27CE34A522085AF" type="ORCID">0000-0002-6803-6996</mods:nameIdentifier>
<mods:affiliation id="145FBAC35775C92A4CAD0E64B11B16CC">National Institute of Polar Research, 10 - 3, Midoricho, Tachikawa 190 - 8518, Japan &amp; Polar Science Program, The Graduate University for Advanced Studies, SOKENDAI, Tachikawa 190 - 8518, Japan</mods:affiliation>
</mods:name>
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<mods:namePart id="59D9742A467BE4F2559085791FC2586E">Diez, Yander L.</mods:namePart>
<mods:nameIdentifier id="030922AD17A61F0CCC2D7894C3D4FBDF" type="ORCID">0000-0001-8741-4799</mods:nameIdentifier>
<mods:affiliation id="1FA435A6592E744BE002E64DB5AA0EB6">Museum of Nature Hamburg Zoology, Leibniz Institute for the Analysis of Biodiversity Change (LIB), Martin-Luther-King-Platz 3, 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:date id="E97D9A594F7E76BD190555A779CD99F4">2024</mods:date>
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<mods:number id="5EA85CA639846B5A1D9B8445734D6FDE">100</mods:number>
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<mods:identifier id="1A0CC8138A5D44F22E7FDA7E26D3FF66" type="ZooBank">5E91BC1B-10CD-4E10-8B3A-0300757562D9</mods:identifier>
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<treatment id="C39A668E597E5A358BF2799B12B77496" ID-DOI="http://doi.org/10.5281/zenodo.14171146" ID-Zenodo-Dep="14171146" ID-arpha="C39A668E-597E-5A35-8BF2-799B12B77496" ID-zoobank="https://zoobank.org/29B3324A-5D36-4B51-93E0-A0792BB3BAE0" LSID="urn:lsid:zoobank.org:act:29B3324A-5D36-4B51-93E0-A0792BB3BAE0" LSID-ZBK="urn:lsid:zoobank.org:act:29B3324A-5D36-4B51-93E0-A0792BB3BAE0" httpUri="http://treatment.plazi.org/id/C39A668E597E5A358BF2799B12B77496">
<subSubSection id="7142AFEB4F5BE1D0DF5A685DD4CF3152" type="nomenclature">
<paragraph id="162F4D102BC6F324E429849C9AC43720">
<taxonomicName id="586C72C229BD825B0786F7ADA1CBCF5F" authorityName="Jimi &amp; Hookabe &amp; Imura &amp; Diez" authorityYear="2024" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="quadricaudata" status="sp. nov.">
<emphasis id="DE55762296739AE5CA331E09931D5395" italics="true">Proschizorhynchella quadricaudata</emphasis>
</taxonomicName>
<taxonomicNameLabel id="B58CE4436A6E5DDCF2AEABC0755A08D3" rank="species">sp. nov.</taxonomicNameLabel>
</paragraph>
</subSubSection>
<subSubSection id="6EE0F2701DA98379B70277DD77590E6C" type="description">
<paragraph id="8FA4B1C217A3F7F40AF62AD41078C816">
<figureCitation id="42A48CE781C5A570F8BE80AB36BA1D4D" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Proschizorhynchella quadricaudata sp. nov., live specimen. A. Holotype (NSMT - Pl 6475); B. Reference specimen (NSMT - Pl 6478). A. Whole specimen, dorsal view, pharynx discharged; B. Whole specimen, latero-dorsal view. Scale bars: 1 mm (A); 0.3 mm (B). Abbreviations: b, bursa; c, male copulatory organ; ca, common atrium; g, glands; oss, orange spherical structure; mgd, male genital duct; ov, ovary; ph, pharynx; s, stylet; sv, seminal vesicle; t, testis; v, vitellarium." figureDoi="10.3897/zse.100.125042.figure2" httpUri="https://binary.pensoft.net/fig/1175309">Figs 2</figureCitation>
,
<figureCitation id="DFACEDA996CF2166BCB3397DD10F62D0" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Proschizorhynchella quadricaudata sp. nov., live specimen, (A F) reference specimen (NSMT - Pl 6478), (G, H) holotype (NSMT - Pl 6475). A. Anterior end; B. Proboscis with glands row; C. DIC view of proboscis with glands row (indicated by arrow); D. Midbody area; adhesive papillae are indicated by dashed lines (indicated by arrow); E. Overview of reproductive organs; F. Copulatory organ and common atrium; G. Pharynx; H. Tail with four finger-like projections. Scale bars: 200 μm (A); 100 μm (B); 200 μm (C E); 100 μm (F H). Abbreviations: br, bristles; ca, common atrium; g, glands; gp, globular papillae; mc, muscles; mgd, male genital duct; ov, ovary; ph, pharynx; pv, prostate vesicle; s, stylet; sv, seminal vesicle; t, testis." figureDoi="10.3897/zse.100.125042.figure3" httpUri="https://binary.pensoft.net/fig/1175310">3</figureCitation>
,
<figureCitation id="1A0D509E4B7DBAFA13D427626F0A98AC" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Proschizorhynchella quadricaudata sp. nov., drawing based on a reference specimen (NSMT - Pl 6478). A. Whole body; B. Male copulatory organ with stylet. Scale bars: 300 μm (A); 100 μm (B). Abbreviations: b, bursa; c, cirrus; ca, common atrium; e, eye; g, glands; gb, globular papillae; mgd, male genital duct; oss, orange spherical structure; ov, ovary; ph, pharynx; pr, proboscis; pv, prostate vesicle; sd, seminal duct; st, stylet; sv, seminal vesicle; t, testis; v, vitellarium; w, whisker." figureDoi="10.3897/zse.100.125042.figure4" httpUri="https://binary.pensoft.net/fig/1175311">4 (New Japanese name: Yotsuo-kuchibashi-mushi</figureCitation>
)
</paragraph>
</subSubSection>
<subSubSection id="SECID0EHSAG" type="material">
<paragraph id="0237932A761C164AFD9AF750BD810584">
<heading id="98EB8D19AFC85B82CA67E0EEC7E2CF27" reason="title">Video material.</heading>
</paragraph>
<paragraph id="4548D662E30CA059EC6AEE395CAF99E4">
Video of male copulatory organ of
<emphasis id="609D7A0ACE99FDD2BAA688E7357413D8" italics="true">
Proschizorynchella
<taxonomicName id="D88BFABDF00C828566B5E853181674C1" authorityName="Jimi &amp; Hookabe &amp; Imura &amp; Diez" authorityYear="2024" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="quadricaudata">quadricaudata</taxonomicName>
</emphasis>
(
<ext-link id="38363352A46A5E91A5341BC832230DFE" ext-link-type="doi" xlink_href="10.6084/m9.figshare.25568148.v1" xlink_type="simple">https://doi.org/10.6084/m9.figshare.25568148.v1</ext-link>
).
</paragraph>
</subSubSection>
<subSubSection id="SECID0E4SAG" type="type material">
<paragraph id="75D74ED9E916F07CB29FE1201573F324">
<heading id="3057FF3E544DA38E3EBBF08C489597E5" reason="title">Type material.</heading>
</paragraph>
<paragraph id="74D719CC5BF8F40E30A30229C80A57FC">
<materialsCitation id="E7CC419C1E9FEBA0CF25363E7C98D05E" collectedFrom="intertidal sands" collectingDate="2019-11-30" collectingDateMax="2019-11-30" collectingDateMin="2019-05-15" collectionCode="NSMT" collectorName="NJ &amp; NH" country="Japan" location="Imaihama Beach" specimenCode="NSMT-Pl 6475" specimenCount="1" specimenCount-adult="1" stateProvince="Central Japan" typeStatus="holotype">
<emphasis id="9D9BF8BA037CE0282813B4005BD33414" bold="true" italics="true">
<typeStatus id="DA8DA6B4AD0B2E3BB4A2C2E6A657A990" type="holotype">Holotype</typeStatus>
</emphasis>
• (
<specimenCode id="DF11471865BE267F0F6E2539AE621BF9">
<named-content id="B0381371D11FEAEDCC272DFA7237E309" content-type="dwc:institutional_code" xlink_href="http://grbio.org/institution/national-science-museum-natural-history" xlink_title="National Museum of Nature and Science, Tsukuba">NSMT</named-content>
-Pl 6475
</specimenCode>
):
<specimenCount id="8345507A671D4334403392BD25E8B409" count="1" type="adult">adult</specimenCount>
,
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,
<location id="7E03EDF19219F32A3522E7FE90469E2D" LSID="urn:lsid:plazi:treatment:C39A668E597E5A358BF2799B12B77496:7E03EDF19219F32A3522E7FE90469E2D" country="Japan" name="Imaihama Beach" stateProvince="Central Japan">Imaihama Beach</location>
,
<date id="0483AA639C1D3F299C1018FDDC4CC790" value="2019-11-30">
<collectingDate id="7ED6EDCC7BCD519D4C97396D8F884DE6" value="2019-11-30">30 Nov. 2019</collectingDate>
</date>
, collected by
<collectorName id="3FBEF411919ADDA720E5A355DB796CE5">NJ</collectorName>
and
<collectorName id="543C76D1AAF64A7FE77B314EFE32A053">NH</collectorName>
</materialsCitation>
; •
<materialsCitation id="DFF38AECE8252F26C55DCD45D365F94F" collectedFrom="intertidal sands" collectingDate="2019-10-30" collectingDateMax="2019-11-30" collectingDateMin="2019-05-15" collectionCode="NSMT" collectorName="NJ &amp; NH" country="Japan" location="Ishibu Beach" specimenCode="NSMT-Pl 6476" specimenCount="1" stateProvince="Central Japan" typeStatus="holotype">
<specimenCount id="00500FD0FC12D54EEDD59AAFC478592F" count="1" type="generic">one reference specimen</specimenCount>
(
<specimenCode id="ADAF56B45B2BF24D1D648B250AA6D289">
<named-content id="AAE7295CE4D95BF7E99E44BA64089CE5" content-type="dwc:institutional_code" xlink_href="http://grbio.org/institution/national-science-museum-natural-history" xlink_title="National Museum of Nature and Science, Tsukuba">NSMT</named-content>
-Pl 6476
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):
<collectedFrom id="05F048FE64A34ECD7D61AF4276DA0B91">intertidal sands</collectedFrom>
,
<location id="A77E0220E6C58324817CC58077104B09" LSID="urn:lsid:plazi:treatment:C39A668E597E5A358BF2799B12B77496:A77E0220E6C58324817CC58077104B09" country="Japan" name="Ishibu Beach" stateProvince="Central Japan">Ishibu Beach</location>
,
<date id="783BC868BA96C9E7EEB0E2EFDA656AD7" value="2019-10-30">
<collectingDate id="A908AA9F82DC417CB3BF6E20D1A3AD59" value="2019-10-30">30 Oct. 2019</collectingDate>
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, collected by
<collectorName id="BEC7A022A914CFC491EC1F692607CD18">NJ</collectorName>
and
<collectorName id="F6086F80F47761474326CA4251B2B03C">NH</collectorName>
</materialsCitation>
; •
<materialsCitation id="354899DF197D3870DBFB47D0E261255C" collectedFrom="intertidal sands" collectingDate="2019-10-29" collectingDateMax="2019-11-30" collectingDateMin="2019-05-15" collectionCode="NSMT" collectorName="NJ &amp; NH" country="Japan" location="Manazuru" specimenCode="NSMT-Pl 6477" specimenCount="1" stateProvince="Central Japan" typeStatus="holotype">
<specimenCount id="9DF764F854F9FD80EC9878E1B6DEEAC8" count="1" type="generic">one reference specimen</specimenCount>
(
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<named-content id="C07C1197B2B3F83621864037D0FDE20F" content-type="dwc:institutional_code" xlink_href="http://grbio.org/institution/national-science-museum-natural-history" xlink_title="National Museum of Nature and Science, Tsukuba">NSMT</named-content>
-Pl 6477
</specimenCode>
):
<collectedFrom id="02CF4BDB99A5781327444CE43BE6DB6A">intertidal sands</collectedFrom>
,
<location id="726A96E0172C3FDA1C1945795E3F655D" LSID="urn:lsid:plazi:treatment:C39A668E597E5A358BF2799B12B77496:726A96E0172C3FDA1C1945795E3F655D" country="Japan" name="Manazuru" stateProvince="Central Japan">Manazuru</location>
,
<date id="4539929345CF5A8F9407BE615B1F8693" value="2019-10-29">
<collectingDate id="76820D9D2BBDA1B2F70E26054185299D" value="2019-10-29">29 Oct. 2019</collectingDate>
</date>
, collected by
<collectorName id="48E6D694FD1654694423E4A66F8FAABA">NJ</collectorName>
and
<collectorName id="79BD65990717CF78E624C3BDB4BB45D9">NH</collectorName>
</materialsCitation>
; •
<materialsCitation id="A3D61A2564A997CFD9B80EA363AE1C3C" collectedFrom="intertidal sands" collectingDate="2019-05-15" collectingDateMax="2019-11-30" collectingDateMin="2019-05-15" collectionCode="NSMT" collectorName="NJ &amp; NH" country="Japan" location="Yoichi" specimenCode="NSMT-Pl 6478" specimenCount="1" stateProvince="Central Japan" typeStatus="holotype">
<specimenCount id="9B3CF66A92C04F6CA31EE1AA2293840F" count="1" type="generic">one reference specimen</specimenCount>
(
<specimenCode id="128F8990DDC2161E13AC1363FBAD2268">
<named-content id="37D9667C38A754FAED8525FA53CCFBB8" content-type="dwc:institutional_code" xlink_href="http://grbio.org/institution/national-science-museum-natural-history" xlink_title="National Museum of Nature and Science, Tsukuba">NSMT</named-content>
-Pl 6478
</specimenCode>
):
<collectedFrom id="5754FAEB68F4670569331C3B040B0D5A">intertidal sands</collectedFrom>
,
<location id="79B20C75426C51C989A600FB68C9934E" LSID="urn:lsid:plazi:treatment:C39A668E597E5A358BF2799B12B77496:79B20C75426C51C989A600FB68C9934E" country="Japan" name="Yoichi" stateProvince="Central Japan">Yoichi</location>
,
<date id="932E9B5F66771C15BE2C118AF514BE2A" value="2019-05-15">
<collectingDate id="19005E9D2A988BA90951299C46DEA0DF" value="2019-05-15">15 May 2019</collectingDate>
</date>
, collected by
<collectorName id="9CAF0DCB823E338C61C5ACE98EBF3C0D">NJ</collectorName>
and
<collectorName id="36303F4F802D88FEC3AE98DB532F21A4">NH</collectorName>
</materialsCitation>
; •
<materialsCitation id="BDB862EC56FACC987C000257C394E7CC" collectedFrom="intertidal sands" collectingDate="2019-10-29" collectingDateMax="2019-11-30" collectingDateMin="2019-05-15" collectionCode="NSMT" collectorName="NJ &amp; NH" country="Japan" location="Mihama" specimenCount="1" stateProvince="Central Japan" typeStatus="holotype">
<specimenCount id="343E6574BE3960D70BD0FE980F2954D5" count="1" type="generic">additional specimen</specimenCount>
:
<collectedFrom id="1AF7B5B42C9AF5639B1F4C4046DBB23A">intertidal sands</collectedFrom>
,
<location id="27F6976A0EBAF3F8C96E3ECFA91E6B3E" LSID="urn:lsid:plazi:treatment:C39A668E597E5A358BF2799B12B77496:27F6976A0EBAF3F8C96E3ECFA91E6B3E" country="Japan" name="Mihama" stateProvince="Central Japan">Mihama</location>
,
<date id="BF5722303CB0D359AA8B7ABCEC7A128A" value="2019-10-29">
<collectingDate id="7ABB8089105E076D4D4BD5D9FCCA7028" value="2019-10-29">29 Oct. 2019</collectingDate>
</date>
, collected by
<collectorName id="82EDA4D2C26C7054E4B99BF319BE4B35">NJ</collectorName>
and
<collectorName id="CF8A5EFF6CF3378DADEA4CC14C926455">NH</collectorName>
</materialsCitation>
; •
<materialsCitation id="EA1CA9496D1E45559A6D388C5A7CC6C0" collectedFrom="intertidal sands" collectingDate="2019-11-30" collectingDateMax="2019-11-30" collectingDateMin="2019-05-15" collectionCode="NSMT" collectorName="NJ &amp; NH" country="Japan" location="Imaihama Beach" specimenCount="1" stateProvince="Central Japan" typeStatus="holotype">
<specimenCount id="8DF8C0A259D3CBB4BE65D1DD93B32B52" count="1" type="generic">additional specimen</specimenCount>
:
<collectedFrom id="55AA6B3328348CF1135CAD59A838B314">intertidal sands</collectedFrom>
,
<location id="B544B9CD6AD7E4B87258D7E9D35107B4" LSID="urn:lsid:plazi:treatment:C39A668E597E5A358BF2799B12B77496:B544B9CD6AD7E4B87258D7E9D35107B4" country="Japan" name="Imaihama Beach" stateProvince="Central Japan">Imaihama Beach</location>
,
<date id="4A36BED7D0D2064F95883AF0FDD20231" value="2019-11-30">
<collectingDate id="34B3C987ED94084C1125E3FD93EBEF69" value="2019-11-30">30 Nov. 2019</collectingDate>
</date>
, collected by
<collectorName id="0EE1AFAB3D659CDBF3E190B0D269CF7E">NJ</collectorName>
and
<collectorName id="874E5C07DE145266897A1ED9DE1F840C">NH</collectorName>
, used for DNA extraction
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="SECID0E3TAG" type="description">
<paragraph id="6D3937F73DC8A91D10F7CC97665E7436">
<heading id="488B171449F0FDC51F55581942549C3F" reason="title">Description.</heading>
</paragraph>
<paragraph id="95034A51B17AD64BDD5E7FD118A4D4DC">
Body
<quantity id="F71679BDB53092131182EB5BC8386298" metricMagnitude="-3" metricUnit="m" metricValue="2.2" unit="mm" value="2.2">2.2 mm</quantity>
long (
<quantity id="B82A11571F72DEF6F4F8FD1943148F11" metricMagnitude="-3" metricUnit="m" metricValue="2.0" metricValueMax="2.3" metricValueMin="1.7" unit="mm" value="2.0" valueMax="2.3" valueMin="1.7">1.72.3 mm</quantity>
, n = 4),
<quantity id="30BEA75BD68C4E0886E802B7044E9833" metricMagnitude="-4" metricUnit="m" metricValue="4.0" unit="mm" value="0.4">0.4 mm</quantity>
at its widest point (
<quantity id="F6DCA090289C43F0510CB5F1506288EB" metricMagnitude="-4" metricUnit="m" metricValue="4.5" metricValueMax="5.0" metricValueMin="4.0" unit="mm" value="0.45" valueMax="0.5" valueMin="0.4">0.40.5 mm</quantity>
, n = 4). Live specimens yellowish and translucent (Fig.
<figureCitation id="768A2C0A574753342C606BB83E23405E" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Proschizorhynchella quadricaudata sp. nov., live specimen. A. Holotype (NSMT - Pl 6475); B. Reference specimen (NSMT - Pl 6478). A. Whole specimen, dorsal view, pharynx discharged; B. Whole specimen, latero-dorsal view. Scale bars: 1 mm (A); 0.3 mm (B). Abbreviations: b, bursa; c, male copulatory organ; ca, common atrium; g, glands; oss, orange spherical structure; mgd, male genital duct; ov, ovary; ph, pharynx; s, stylet; sv, seminal vesicle; t, testis; v, vitellarium." figureDoi="10.3897/zse.100.125042.figure2" httpUri="https://binary.pensoft.net/fig/1175309">2</figureCitation>
). Two pairs of short bristles (Figs
<figureCitation id="C04EFDFCDB8D8AFD6EAB3E49DA651025" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Proschizorhynchella quadricaudata sp. nov., live specimen, (A F) reference specimen (NSMT - Pl 6478), (G, H) holotype (NSMT - Pl 6475). A. Anterior end; B. Proboscis with glands row; C. DIC view of proboscis with glands row (indicated by arrow); D. Midbody area; adhesive papillae are indicated by dashed lines (indicated by arrow); E. Overview of reproductive organs; F. Copulatory organ and common atrium; G. Pharynx; H. Tail with four finger-like projections. Scale bars: 200 μm (A); 100 μm (B); 200 μm (C E); 100 μm (F H). Abbreviations: br, bristles; ca, common atrium; g, glands; gp, globular papillae; mc, muscles; mgd, male genital duct; ov, ovary; ph, pharynx; pv, prostate vesicle; s, stylet; sv, seminal vesicle; t, testis." figureDoi="10.3897/zse.100.125042.figure3" httpUri="https://binary.pensoft.net/fig/1175310">3 A</figureCitation>
,
<figureCitation id="EEA9D5F97BB4824BE2934595260561FF" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Proschizorhynchella quadricaudata sp. nov., drawing based on a reference specimen (NSMT - Pl 6478). A. Whole body; B. Male copulatory organ with stylet. Scale bars: 300 μm (A); 100 μm (B). Abbreviations: b, bursa; c, cirrus; ca, common atrium; e, eye; g, glands; gb, globular papillae; mgd, male genital duct; oss, orange spherical structure; ov, ovary; ph, pharynx; pr, proboscis; pv, prostate vesicle; sd, seminal duct; st, stylet; sv, seminal vesicle; t, testis; v, vitellarium; w, whisker." figureDoi="10.3897/zse.100.125042.figure4" httpUri="https://binary.pensoft.net/fig/1175311">4 A</figureCitation>
: br) and two pairs of small globular papillae (Figs
<figureCitation id="FFBEF255EA052121096F05FC1FF5F127" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Proschizorhynchella quadricaudata sp. nov., live specimen, (A F) reference specimen (NSMT - Pl 6478), (G, H) holotype (NSMT - Pl 6475). A. Anterior end; B. Proboscis with glands row; C. DIC view of proboscis with glands row (indicated by arrow); D. Midbody area; adhesive papillae are indicated by dashed lines (indicated by arrow); E. Overview of reproductive organs; F. Copulatory organ and common atrium; G. Pharynx; H. Tail with four finger-like projections. Scale bars: 200 μm (A); 100 μm (B); 200 μm (C E); 100 μm (F H). Abbreviations: br, bristles; ca, common atrium; g, glands; gp, globular papillae; mc, muscles; mgd, male genital duct; ov, ovary; ph, pharynx; pv, prostate vesicle; s, stylet; sv, seminal vesicle; t, testis." figureDoi="10.3897/zse.100.125042.figure3" httpUri="https://binary.pensoft.net/fig/1175310">3 A</figureCitation>
,
<figureCitation id="13B976F6C53A9720398913F00BF3FC78" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Proschizorhynchella quadricaudata sp. nov., drawing based on a reference specimen (NSMT - Pl 6478). A. Whole body; B. Male copulatory organ with stylet. Scale bars: 300 μm (A); 100 μm (B). Abbreviations: b, bursa; c, cirrus; ca, common atrium; e, eye; g, glands; gb, globular papillae; mgd, male genital duct; oss, orange spherical structure; ov, ovary; ph, pharynx; pr, proboscis; pv, prostate vesicle; sd, seminal duct; st, stylet; sv, seminal vesicle; t, testis; v, vitellarium; w, whisker." figureDoi="10.3897/zse.100.125042.figure4" httpUri="https://binary.pensoft.net/fig/1175311">4 A</figureCitation>
: gp) at anterior end. Proboscis consisting of two elongated lips, 360 μm in length, 100 μm at the widest part (Figs
<figureCitation id="7295E1AD91632C378569D78C3347FFD0" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Proschizorhynchella quadricaudata sp. nov., live specimen. A. Holotype (NSMT - Pl 6475); B. Reference specimen (NSMT - Pl 6478). A. Whole specimen, dorsal view, pharynx discharged; B. Whole specimen, latero-dorsal view. Scale bars: 1 mm (A); 0.3 mm (B). Abbreviations: b, bursa; c, male copulatory organ; ca, common atrium; g, glands; oss, orange spherical structure; mgd, male genital duct; ov, ovary; ph, pharynx; s, stylet; sv, seminal vesicle; t, testis; v, vitellarium." figureDoi="10.3897/zse.100.125042.figure2" httpUri="https://binary.pensoft.net/fig/1175309">2 A, B</figureCitation>
,
<figureCitation id="EDFF40F7A74C0D8C801BCEC2574CBC3E" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Proschizorhynchella quadricaudata sp. nov., live specimen, (A F) reference specimen (NSMT - Pl 6478), (G, H) holotype (NSMT - Pl 6475). A. Anterior end; B. Proboscis with glands row; C. DIC view of proboscis with glands row (indicated by arrow); D. Midbody area; adhesive papillae are indicated by dashed lines (indicated by arrow); E. Overview of reproductive organs; F. Copulatory organ and common atrium; G. Pharynx; H. Tail with four finger-like projections. Scale bars: 200 μm (A); 100 μm (B); 200 μm (C E); 100 μm (F H). Abbreviations: br, bristles; ca, common atrium; g, glands; gp, globular papillae; mc, muscles; mgd, male genital duct; ov, ovary; ph, pharynx; pv, prostate vesicle; s, stylet; sv, seminal vesicle; t, testis." figureDoi="10.3897/zse.100.125042.figure3" httpUri="https://binary.pensoft.net/fig/1175310">3 A C</figureCitation>
,
<figureCitation id="AC33E4ECC5A06EE4188A46D16A5DB6A8" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Proschizorhynchella quadricaudata sp. nov., drawing based on a reference specimen (NSMT - Pl 6478). A. Whole body; B. Male copulatory organ with stylet. Scale bars: 300 μm (A); 100 μm (B). Abbreviations: b, bursa; c, cirrus; ca, common atrium; e, eye; g, glands; gb, globular papillae; mgd, male genital duct; oss, orange spherical structure; ov, ovary; ph, pharynx; pr, proboscis; pv, prostate vesicle; sd, seminal duct; st, stylet; sv, seminal vesicle; t, testis; v, vitellarium; w, whisker." figureDoi="10.3897/zse.100.125042.figure4" httpUri="https://binary.pensoft.net/fig/1175311">4 A</figureCitation>
: pr); a row of glands with 2737 apertures in the four studied specimens on inner side of proboscis lips (Fig.
<figureCitation id="21FE27E8EEF4A8F931725704A9B630CA" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Proschizorhynchella quadricaudata sp. nov., live specimen, (A F) reference specimen (NSMT - Pl 6478), (G, H) holotype (NSMT - Pl 6475). A. Anterior end; B. Proboscis with glands row; C. DIC view of proboscis with glands row (indicated by arrow); D. Midbody area; adhesive papillae are indicated by dashed lines (indicated by arrow); E. Overview of reproductive organs; F. Copulatory organ and common atrium; G. Pharynx; H. Tail with four finger-like projections. Scale bars: 200 μm (A); 100 μm (B); 200 μm (C E); 100 μm (F H). Abbreviations: br, bristles; ca, common atrium; g, glands; gp, globular papillae; mc, muscles; mgd, male genital duct; ov, ovary; ph, pharynx; pv, prostate vesicle; s, stylet; sv, seminal vesicle; t, testis." figureDoi="10.3897/zse.100.125042.figure3" httpUri="https://binary.pensoft.net/fig/1175310">3 A, B, C</figureCitation>
: indicated by white arrow, Fig.
<figureCitation id="3C627C2BA12847A5F7F7C59BE25A961F" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Proschizorhynchella quadricaudata sp. nov., drawing based on a reference specimen (NSMT - Pl 6478). A. Whole body; B. Male copulatory organ with stylet. Scale bars: 300 μm (A); 100 μm (B). Abbreviations: b, bursa; c, cirrus; ca, common atrium; e, eye; g, glands; gb, globular papillae; mgd, male genital duct; oss, orange spherical structure; ov, ovary; ph, pharynx; pr, proboscis; pv, prostate vesicle; sd, seminal duct; st, stylet; sv, seminal vesicle; t, testis; v, vitellarium; w, whisker." figureDoi="10.3897/zse.100.125042.figure4" httpUri="https://binary.pensoft.net/fig/1175311">4 A</figureCitation>
); gland apertures rectangular; glands measuring 1416 μm long and 68 μm in width in the four studied specimens. Pair of black eyes situated posterior to the proboscis (Figs
<figureCitation id="39E0C198A758076D4BA8C539C7834670" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Proschizorhynchella quadricaudata sp. nov., live specimen. A. Holotype (NSMT - Pl 6475); B. Reference specimen (NSMT - Pl 6478). A. Whole specimen, dorsal view, pharynx discharged; B. Whole specimen, latero-dorsal view. Scale bars: 1 mm (A); 0.3 mm (B). Abbreviations: b, bursa; c, male copulatory organ; ca, common atrium; g, glands; oss, orange spherical structure; mgd, male genital duct; ov, ovary; ph, pharynx; s, stylet; sv, seminal vesicle; t, testis; v, vitellarium." figureDoi="10.3897/zse.100.125042.figure2" httpUri="https://binary.pensoft.net/fig/1175309">2</figureCitation>
,
<figureCitation id="AC9FFB56C71AFD545E4BC9B37A18A39F" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Proschizorhynchella quadricaudata sp. nov., drawing based on a reference specimen (NSMT - Pl 6478). A. Whole body; B. Male copulatory organ with stylet. Scale bars: 300 μm (A); 100 μm (B). Abbreviations: b, bursa; c, cirrus; ca, common atrium; e, eye; g, glands; gb, globular papillae; mgd, male genital duct; oss, orange spherical structure; ov, ovary; ph, pharynx; pr, proboscis; pv, prostate vesicle; sd, seminal duct; st, stylet; sv, seminal vesicle; t, testis; v, vitellarium; w, whisker." figureDoi="10.3897/zse.100.125042.figure4" httpUri="https://binary.pensoft.net/fig/1175311">4 A</figureCitation>
). Pharynx located at midbody, 160240 μm in length and 200260 μm in width in the four studied specimens (Figs
<figureCitation id="B5934F2EDD295BEFE0E6901DA41EE49E" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Proschizorhynchella quadricaudata sp. nov., live specimen. A. Holotype (NSMT - Pl 6475); B. Reference specimen (NSMT - Pl 6478). A. Whole specimen, dorsal view, pharynx discharged; B. Whole specimen, latero-dorsal view. Scale bars: 1 mm (A); 0.3 mm (B). Abbreviations: b, bursa; c, male copulatory organ; ca, common atrium; g, glands; oss, orange spherical structure; mgd, male genital duct; ov, ovary; ph, pharynx; s, stylet; sv, seminal vesicle; t, testis; v, vitellarium." figureDoi="10.3897/zse.100.125042.figure2" httpUri="https://binary.pensoft.net/fig/1175309">2 B</figureCitation>
,
<figureCitation id="E300C6103EBA840607EA97FA0E445A09" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Proschizorhynchella quadricaudata sp. nov., live specimen, (A F) reference specimen (NSMT - Pl 6478), (G, H) holotype (NSMT - Pl 6475). A. Anterior end; B. Proboscis with glands row; C. DIC view of proboscis with glands row (indicated by arrow); D. Midbody area; adhesive papillae are indicated by dashed lines (indicated by arrow); E. Overview of reproductive organs; F. Copulatory organ and common atrium; G. Pharynx; H. Tail with four finger-like projections. Scale bars: 200 μm (A); 100 μm (B); 200 μm (C E); 100 μm (F H). Abbreviations: br, bristles; ca, common atrium; g, glands; gp, globular papillae; mc, muscles; mgd, male genital duct; ov, ovary; ph, pharynx; pv, prostate vesicle; s, stylet; sv, seminal vesicle; t, testis." figureDoi="10.3897/zse.100.125042.figure3" httpUri="https://binary.pensoft.net/fig/1175310">3 G</figureCitation>
).
</paragraph>
<caption id="B0C2A62A4CE0B2400E437677E873F1E1" ID-DOI="10.3897/zse.100.125042.figure2" ID-arpha="02B80566-FCFD-5AD5-8D6E-901B7C22B76A" httpUri="https://binary.pensoft.net/fig/1175309" startId="F2">
<paragraph id="81B05B84A6165FE677C9338C7F601C54">
<label id="B79E3109277F53464D7C12EEC258D97A">Figure 2.</label>
</paragraph>
<paragraph id="54BDF449CB9B17E97B195A0D8E8C816A">
<taxonomicName id="E69C236D270196BCF3C70113172E0C41" authorityName="Jimi &amp; Hookabe &amp; Imura &amp; Diez" authorityYear="2024" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="quadricaudata" status="sp. nov.">
<emphasis id="472870D1DA0AC2FDDD440C4D6939C6DC" italics="true">Proschizorhynchella quadricaudata</emphasis>
</taxonomicName>
<taxonomicNameLabel id="894C0B435A653A8736D401FE3E0C880F" rank="species">sp. nov.</taxonomicNameLabel>
, live specimen.
<emphasis id="FAD94141093EFD9F1FCB83F7BF5DEBD4" bold="true">A.</emphasis>
Holotype (
<specimenCode id="CA7A46226CA8AEBF083A78478F80B597">
<named-content id="EA041C48D8B804D4714CECD24B9FD786" content-type="dwc:institutional_code" xlink_href="http://grbio.org/institution/national-science-museum-natural-history" xlink_title="National Museum of Nature and Science, Tsukuba">NSMT</named-content>
-Pl 6475
</specimenCode>
);
<emphasis id="9486891B073313A46477490BD973679B" bold="true">B.</emphasis>
Reference specimen (
<specimenCode id="B06B10095801DF3F865C295C59811103">
<named-content id="CC4B463942ED345D79B99BA5259C79E8" content-type="dwc:institutional_code" xlink_href="http://grbio.org/institution/national-science-museum-natural-history" xlink_title="National Museum of Nature and Science, Tsukuba">NSMT</named-content>
-Pl 6478
</specimenCode>
).
<emphasis id="9216B595CBA41E70BE13C110D863AE8B" bold="true">A.</emphasis>
Whole specimen, dorsal view, pharynx discharged;
<emphasis id="8A04B904DDD93A96AE065C8A4780E07D" bold="true">B.</emphasis>
Whole specimen, latero-dorsal view. Scale bars: 1 mm (
<emphasis id="E0690B729BE9C4A3FC360182C080EFEE" bold="true">A</emphasis>
); 0.3 mm (
<emphasis id="DD3AB30FE41CD469A459E024E6DCD2D7" bold="true">B</emphasis>
). Abbreviations: b, bursa; c, male copulatory organ; ca, common atrium; g, glands; oss, orange spherical structure; mgd, male genital duct; ov, ovary; ph, pharynx; s, stylet; sv, seminal vesicle; t, testis; v, vitellarium.
</paragraph>
</caption>
<caption id="F7459746F929D177DFC422200D14BEF4" ID-DOI="10.3897/zse.100.125042.figure3" ID-arpha="275548B1-A3D7-5E6B-A278-9716119C015D" httpUri="https://binary.pensoft.net/fig/1175310" startId="F3">
<paragraph id="7761EBE03B60A9E781F5450A9906691A">
<label id="FFB97214842C08832A3CC8F0FF6ABBF3">Figure 3.</label>
</paragraph>
<paragraph id="E5B73BC7B9CA0A2EBB6F883C56F5B6FD">
<taxonomicName id="F6FC2811CD5E628FA4B6B8005FB6AFE3" authorityName="Jimi &amp; Hookabe &amp; Imura &amp; Diez" authorityYear="2024" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="quadricaudata" status="sp. nov.">
<emphasis id="36788F0FAA6A19898D84866927734BE1" italics="true">Proschizorhynchella quadricaudata</emphasis>
</taxonomicName>
<taxonomicNameLabel id="15F9090C127EDF978DE8516D8892A0FA" rank="species">sp. nov.</taxonomicNameLabel>
, live specimen, (
<emphasis id="BA881CE20C1A4D7A4A6DF3A2FC0DC751" bold="true">A F</emphasis>
) reference specimen (
<specimenCode id="220EF111690F56F556E06F3EF1A8FBB4">
<named-content id="1DEED346378E4A0835B3F800A89AF1D8" content-type="dwc:institutional_code" xlink_href="http://grbio.org/institution/national-science-museum-natural-history" xlink_title="National Museum of Nature and Science, Tsukuba">NSMT</named-content>
-Pl 6478
</specimenCode>
), (
<emphasis id="0BC9DFD1275925D37782E0C237D84EE7" bold="true">G, H</emphasis>
) holotype (
<specimenCode id="1607ACF350F898D9DD34505841545E5D">
<named-content id="070D800DE6BEEBA7022529CE615BA323" content-type="dwc:institutional_code" xlink_href="http://grbio.org/institution/national-science-museum-natural-history" xlink_title="National Museum of Nature and Science, Tsukuba">NSMT</named-content>
-Pl 6475
</specimenCode>
).
<emphasis id="ED60B814AA2507AC22C1764A94874946" bold="true">A.</emphasis>
Anterior end;
<emphasis id="44CF9967A7B8BF6B831C9222CE76E336" bold="true">B.</emphasis>
Proboscis with glands row;
<emphasis id="1B1D9E2B8083BB33B759776AFB03E96B" bold="true">C.</emphasis>
DIC view of proboscis with glands row (indicated by arrow);
<emphasis id="422C0339D092CE28B335BF45F0F5A4A2" bold="true">D.</emphasis>
Midbody area; adhesive papillae are indicated by dashed lines (indicated by arrow);
<emphasis id="580BD812EA84118562EBDE058B8F2727" bold="true">E.</emphasis>
Overview of reproductive organs;
<emphasis id="F12B640B748A5A1618A05FF2F0FD0FC6" bold="true">F.</emphasis>
Copulatory organ and common atrium;
<emphasis id="DCAD98A52592E5426A7C35FD32E75CB5" bold="true">G.</emphasis>
Pharynx;
<emphasis id="4800810A27CFA6B05D844835ED2947E9" bold="true">H.</emphasis>
Tail with four finger-like projections. Scale bars: 200 μm (
<emphasis id="7563913039B2630ACC298E87E3358E1F" bold="true">A</emphasis>
); 100 μm (
<emphasis id="0FE9ABE29481ED352533CD2A172543B4" bold="true">B</emphasis>
); 200 μm (
<emphasis id="BA12782C0D7506D7EB868F7473FD71DF" bold="true">C E</emphasis>
); 100 μm (
<emphasis id="A8FB388F4444D15EDDB5944473F7B85F" bold="true">F H</emphasis>
). Abbreviations: br, bristles; ca, common atrium; g, glands; gp, globular papillae; mc, muscles; mgd, male genital duct; ov, ovary; ph, pharynx; pv, prostate vesicle; s, stylet; sv, seminal vesicle; t, testis.
</paragraph>
</caption>
<caption id="7078EF416389C3CC05B6873ADB6C8C89" ID-DOI="10.3897/zse.100.125042.figure4" ID-arpha="ABAC08CB-D6C2-53C1-8D67-A09737B4555E" httpUri="https://binary.pensoft.net/fig/1175311" startId="F4">
<paragraph id="360375C83B898AC027C7AD7FDE4842FE">
<label id="3CC8C9C84935115E0F46B8A7254F67F8">Figure 4.</label>
</paragraph>
<paragraph id="E52B1DD002559EE69A865D46D400BCAE">
<taxonomicName id="DAF31B5F43AA8724E7319110B17B3677" authorityName="Jimi &amp; Hookabe &amp; Imura &amp; Diez" authorityYear="2024" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="quadricaudata" status="sp. nov.">
<emphasis id="876FC934C1106DB90BA8A1FA6AE9BAC2" italics="true">Proschizorhynchella quadricaudata</emphasis>
</taxonomicName>
<taxonomicNameLabel id="340A25E2E3EDF8C558DC074F67D5AAB0" rank="species">sp. nov.</taxonomicNameLabel>
, drawing based on a reference specimen (
<specimenCode id="977DBA4CFC2E93A17A0014E562120B55">
<named-content id="D95C041366080D2BD1753A467885D3B0" content-type="dwc:institutional_code" xlink_href="http://grbio.org/institution/national-science-museum-natural-history" xlink_title="National Museum of Nature and Science, Tsukuba">NSMT</named-content>
-Pl 6478
</specimenCode>
).
<emphasis id="4141ACBEC90C6B3C934094DE88CCF753" bold="true">A.</emphasis>
Whole body;
<emphasis id="54590EF553FC01368BD9FFD930E26358" bold="true">B.</emphasis>
Male copulatory organ with stylet. Scale bars: 300 μm (
<emphasis id="EEC24A77EADA68992404327FDFC6464B" bold="true">A</emphasis>
); 100 μm (
<emphasis id="B194C588AB702E6C915BE83BDE91B575" bold="true">B</emphasis>
). Abbreviations: b, bursa; c, cirrus; ca, common atrium; e, eye; g, glands; gb, globular papillae; mgd, male genital duct; oss, orange spherical structure; ov, ovary; ph, pharynx; pr, proboscis; pv, prostate vesicle; sd, seminal duct; st, stylet; sv, seminal vesicle; t, testis; v, vitellarium; w, whisker.
</paragraph>
</caption>
<paragraph id="71755846088CAD7F9070973C7DE8FDCA">
One adhesive girdle located at the level of the pharynx, composed of six adhesive papillae arranged at regular intervals (Fig.
<figureCitation id="A4FCA697782F7FADB818284CDF535A44" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Proschizorhynchella quadricaudata sp. nov., live specimen, (A F) reference specimen (NSMT - Pl 6478), (G, H) holotype (NSMT - Pl 6475). A. Anterior end; B. Proboscis with glands row; C. DIC view of proboscis with glands row (indicated by arrow); D. Midbody area; adhesive papillae are indicated by dashed lines (indicated by arrow); E. Overview of reproductive organs; F. Copulatory organ and common atrium; G. Pharynx; H. Tail with four finger-like projections. Scale bars: 200 μm (A); 100 μm (B); 200 μm (C E); 100 μm (F H). Abbreviations: br, bristles; ca, common atrium; g, glands; gp, globular papillae; mc, muscles; mgd, male genital duct; ov, ovary; ph, pharynx; pv, prostate vesicle; s, stylet; sv, seminal vesicle; t, testis." figureDoi="10.3897/zse.100.125042.figure3" httpUri="https://binary.pensoft.net/fig/1175310">3 D</figureCitation>
: indicated by black arrows). Tail with four finger-like projections presents at the posterior end (Figs
<figureCitation id="B0CBE8C7D66288092FCA0510A2C965C6" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Proschizorhynchella quadricaudata sp. nov., live specimen, (A F) reference specimen (NSMT - Pl 6478), (G, H) holotype (NSMT - Pl 6475). A. Anterior end; B. Proboscis with glands row; C. DIC view of proboscis with glands row (indicated by arrow); D. Midbody area; adhesive papillae are indicated by dashed lines (indicated by arrow); E. Overview of reproductive organs; F. Copulatory organ and common atrium; G. Pharynx; H. Tail with four finger-like projections. Scale bars: 200 μm (A); 100 μm (B); 200 μm (C E); 100 μm (F H). Abbreviations: br, bristles; ca, common atrium; g, glands; gp, globular papillae; mc, muscles; mgd, male genital duct; ov, ovary; ph, pharynx; pv, prostate vesicle; s, stylet; sv, seminal vesicle; t, testis." figureDoi="10.3897/zse.100.125042.figure3" httpUri="https://binary.pensoft.net/fig/1175310">3 H</figureCitation>
,
<figureCitation id="B2B3A07A7E93B467688D60095CE46AAF" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Proschizorhynchella quadricaudata sp. nov., drawing based on a reference specimen (NSMT - Pl 6478). A. Whole body; B. Male copulatory organ with stylet. Scale bars: 300 μm (A); 100 μm (B). Abbreviations: b, bursa; c, cirrus; ca, common atrium; e, eye; g, glands; gb, globular papillae; mgd, male genital duct; oss, orange spherical structure; ov, ovary; ph, pharynx; pr, proboscis; pv, prostate vesicle; sd, seminal duct; st, stylet; sv, seminal vesicle; t, testis; v, vitellarium; w, whisker." figureDoi="10.3897/zse.100.125042.figure4" httpUri="https://binary.pensoft.net/fig/1175311">4 B</figureCitation>
: fp), each projection similar in size, 4050 μm in length and 2030 μm in width in the four studied specimens, muscles strongly developed at their middle part (Fig.
<figureCitation id="AB58DC2E2952D3F4D6B296BC636964E4" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Proschizorhynchella quadricaudata sp. nov., live specimen, (A F) reference specimen (NSMT - Pl 6478), (G, H) holotype (NSMT - Pl 6475). A. Anterior end; B. Proboscis with glands row; C. DIC view of proboscis with glands row (indicated by arrow); D. Midbody area; adhesive papillae are indicated by dashed lines (indicated by arrow); E. Overview of reproductive organs; F. Copulatory organ and common atrium; G. Pharynx; H. Tail with four finger-like projections. Scale bars: 200 μm (A); 100 μm (B); 200 μm (C E); 100 μm (F H). Abbreviations: br, bristles; ca, common atrium; g, glands; gp, globular papillae; mc, muscles; mgd, male genital duct; ov, ovary; ph, pharynx; pv, prostate vesicle; s, stylet; sv, seminal vesicle; t, testis." figureDoi="10.3897/zse.100.125042.figure3" httpUri="https://binary.pensoft.net/fig/1175310">3 H</figureCitation>
: mc).
</paragraph>
<paragraph id="E96D581D69F26EE54EFD8815E8493C74">
Pair of testes, each 180 μm in diameter (Figs
<figureCitation id="3BBF644B3315E453A365EF22DAE2EFA5" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Proschizorhynchella quadricaudata sp. nov., live specimen. A. Holotype (NSMT - Pl 6475); B. Reference specimen (NSMT - Pl 6478). A. Whole specimen, dorsal view, pharynx discharged; B. Whole specimen, latero-dorsal view. Scale bars: 1 mm (A); 0.3 mm (B). Abbreviations: b, bursa; c, male copulatory organ; ca, common atrium; g, glands; oss, orange spherical structure; mgd, male genital duct; ov, ovary; ph, pharynx; s, stylet; sv, seminal vesicle; t, testis; v, vitellarium." figureDoi="10.3897/zse.100.125042.figure2" httpUri="https://binary.pensoft.net/fig/1175309">2</figureCitation>
,
<figureCitation id="8B29F12B595BE299032FD87E2CABAC3D" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Proschizorhynchella quadricaudata sp. nov., drawing based on a reference specimen (NSMT - Pl 6478). A. Whole body; B. Male copulatory organ with stylet. Scale bars: 300 μm (A); 100 μm (B). Abbreviations: b, bursa; c, cirrus; ca, common atrium; e, eye; g, glands; gb, globular papillae; mgd, male genital duct; oss, orange spherical structure; ov, ovary; ph, pharynx; pr, proboscis; pv, prostate vesicle; sd, seminal duct; st, stylet; sv, seminal vesicle; t, testis; v, vitellarium; w, whisker." figureDoi="10.3897/zse.100.125042.figure4" httpUri="https://binary.pensoft.net/fig/1175311">4 A</figureCitation>
), located anterior to the pharynx. Seminal ducts widen and form a pair of seminal vesicles posterior to the pharynx (Figs
<figureCitation id="093054E006C9B5DFB491E1B5E149EE72" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Proschizorhynchella quadricaudata sp. nov., live specimen, (A F) reference specimen (NSMT - Pl 6478), (G, H) holotype (NSMT - Pl 6475). A. Anterior end; B. Proboscis with glands row; C. DIC view of proboscis with glands row (indicated by arrow); D. Midbody area; adhesive papillae are indicated by dashed lines (indicated by arrow); E. Overview of reproductive organs; F. Copulatory organ and common atrium; G. Pharynx; H. Tail with four finger-like projections. Scale bars: 200 μm (A); 100 μm (B); 200 μm (C E); 100 μm (F H). Abbreviations: br, bristles; ca, common atrium; g, glands; gp, globular papillae; mc, muscles; mgd, male genital duct; ov, ovary; ph, pharynx; pv, prostate vesicle; s, stylet; sv, seminal vesicle; t, testis." figureDoi="10.3897/zse.100.125042.figure3" httpUri="https://binary.pensoft.net/fig/1175310">3 E</figureCitation>
,
<figureCitation id="CEA7D78F8B68397AB9FB6EBF24152168" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Proschizorhynchella quadricaudata sp. nov., drawing based on a reference specimen (NSMT - Pl 6478). A. Whole body; B. Male copulatory organ with stylet. Scale bars: 300 μm (A); 100 μm (B). Abbreviations: b, bursa; c, cirrus; ca, common atrium; e, eye; g, glands; gb, globular papillae; mgd, male genital duct; oss, orange spherical structure; ov, ovary; ph, pharynx; pr, proboscis; pv, prostate vesicle; sd, seminal duct; st, stylet; sv, seminal vesicle; t, testis; v, vitellarium; w, whisker." figureDoi="10.3897/zse.100.125042.figure4" httpUri="https://binary.pensoft.net/fig/1175311">4 A, B</figureCitation>
: sv), each 160 μm in length (150170 μm, n = 4) and 40 μm in width (4060 μm, n = 4). Seminal ducts (Fig.
<figureCitation id="E2DCCE7E271CAC88B4E8746B460ADF7C" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Proschizorhynchella quadricaudata sp. nov., drawing based on a reference specimen (NSMT - Pl 6478). A. Whole body; B. Male copulatory organ with stylet. Scale bars: 300 μm (A); 100 μm (B). Abbreviations: b, bursa; c, cirrus; ca, common atrium; e, eye; g, glands; gb, globular papillae; mgd, male genital duct; oss, orange spherical structure; ov, ovary; ph, pharynx; pr, proboscis; pv, prostate vesicle; sd, seminal duct; st, stylet; sv, seminal vesicle; t, testis; v, vitellarium; w, whisker." figureDoi="10.3897/zse.100.125042.figure4" httpUri="https://binary.pensoft.net/fig/1175311">4 B</figureCitation>
: sd) fuse in a single duct just before entering the male copulatory bulb. Male copulatory organ comprising a proximal prostate vesicle and a distal stylet. Prostate vesicle globular, 80 μm both in length and width (60120 μm, n = 4) (Figs
<figureCitation id="247C59BE0AAB4DC51B4470E8D398C67E" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Proschizorhynchella quadricaudata sp. nov., live specimen, (A F) reference specimen (NSMT - Pl 6478), (G, H) holotype (NSMT - Pl 6475). A. Anterior end; B. Proboscis with glands row; C. DIC view of proboscis with glands row (indicated by arrow); D. Midbody area; adhesive papillae are indicated by dashed lines (indicated by arrow); E. Overview of reproductive organs; F. Copulatory organ and common atrium; G. Pharynx; H. Tail with four finger-like projections. Scale bars: 200 μm (A); 100 μm (B); 200 μm (C E); 100 μm (F H). Abbreviations: br, bristles; ca, common atrium; g, glands; gp, globular papillae; mc, muscles; mgd, male genital duct; ov, ovary; ph, pharynx; pv, prostate vesicle; s, stylet; sv, seminal vesicle; t, testis." figureDoi="10.3897/zse.100.125042.figure3" httpUri="https://binary.pensoft.net/fig/1175310">3 E</figureCitation>
,
<figureCitation id="43AABBC66A4C1D54972912B45C1990E1" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Proschizorhynchella quadricaudata sp. nov., drawing based on a reference specimen (NSMT - Pl 6478). A. Whole body; B. Male copulatory organ with stylet. Scale bars: 300 μm (A); 100 μm (B). Abbreviations: b, bursa; c, cirrus; ca, common atrium; e, eye; g, glands; gb, globular papillae; mgd, male genital duct; oss, orange spherical structure; ov, ovary; ph, pharynx; pr, proboscis; pv, prostate vesicle; sd, seminal duct; st, stylet; sv, seminal vesicle; t, testis; v, vitellarium; w, whisker." figureDoi="10.3897/zse.100.125042.figure4" httpUri="https://binary.pensoft.net/fig/1175311">4 B</figureCitation>
), separated in two packages; necks of the extracapsular prostate glands enter the copulatory bulb proximally. Stylet enclosed by the male genital duct, cone-shaped, 100150 μm in length and 2030 μm in width in the four studied specimens (Fig.
<figureCitation id="1422D7960F44A5639A834B8C2A02133C" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Proschizorhynchella quadricaudata sp. nov., drawing based on a reference specimen (NSMT - Pl 6478). A. Whole body; B. Male copulatory organ with stylet. Scale bars: 300 μm (A); 100 μm (B). Abbreviations: b, bursa; c, cirrus; ca, common atrium; e, eye; g, glands; gb, globular papillae; mgd, male genital duct; oss, orange spherical structure; ov, ovary; ph, pharynx; pr, proboscis; pv, prostate vesicle; sd, seminal duct; st, stylet; sv, seminal vesicle; t, testis; v, vitellarium; w, whisker." figureDoi="10.3897/zse.100.125042.figure4" httpUri="https://binary.pensoft.net/fig/1175311">4 B</figureCitation>
: st, mgd). Male genital duct opens into the common atrium (Fig.
<figureCitation id="16DC1142B47C03AE50B667D7BB2CEB3A" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Proschizorhynchella quadricaudata sp. nov., live specimen, (A F) reference specimen (NSMT - Pl 6478), (G, H) holotype (NSMT - Pl 6475). A. Anterior end; B. Proboscis with glands row; C. DIC view of proboscis with glands row (indicated by arrow); D. Midbody area; adhesive papillae are indicated by dashed lines (indicated by arrow); E. Overview of reproductive organs; F. Copulatory organ and common atrium; G. Pharynx; H. Tail with four finger-like projections. Scale bars: 200 μm (A); 100 μm (B); 200 μm (C E); 100 μm (F H). Abbreviations: br, bristles; ca, common atrium; g, glands; gp, globular papillae; mc, muscles; mgd, male genital duct; ov, ovary; ph, pharynx; pv, prostate vesicle; s, stylet; sv, seminal vesicle; t, testis." figureDoi="10.3897/zse.100.125042.figure3" httpUri="https://binary.pensoft.net/fig/1175310">3 E, F</figureCitation>
: ca), and the latter leads to the exterior through the common genital pore. Common atrium brownish pigmented due to the secretions of atrial glands.
</paragraph>
<paragraph id="528B6ABD7C64963750C6204064EB8445">
Female genital system consisting of a vitellarium (Fig.
<figureCitation id="E239AB6442BA4E1F86A79593EE758679" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Proschizorhynchella quadricaudata sp. nov., live specimen. A. Holotype (NSMT - Pl 6475); B. Reference specimen (NSMT - Pl 6478). A. Whole specimen, dorsal view, pharynx discharged; B. Whole specimen, latero-dorsal view. Scale bars: 1 mm (A); 0.3 mm (B). Abbreviations: b, bursa; c, male copulatory organ; ca, common atrium; g, glands; oss, orange spherical structure; mgd, male genital duct; ov, ovary; ph, pharynx; s, stylet; sv, seminal vesicle; t, testis; v, vitellarium." figureDoi="10.3897/zse.100.125042.figure2" httpUri="https://binary.pensoft.net/fig/1175309">2 A</figureCitation>
: v) extending between the proboscis and the posterior end of the body, a single ovary (Figs
<figureCitation id="26F86FB1F3807727AEE95278CC5AD133" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Proschizorhynchella quadricaudata sp. nov., live specimen, (A F) reference specimen (NSMT - Pl 6478), (G, H) holotype (NSMT - Pl 6475). A. Anterior end; B. Proboscis with glands row; C. DIC view of proboscis with glands row (indicated by arrow); D. Midbody area; adhesive papillae are indicated by dashed lines (indicated by arrow); E. Overview of reproductive organs; F. Copulatory organ and common atrium; G. Pharynx; H. Tail with four finger-like projections. Scale bars: 200 μm (A); 100 μm (B); 200 μm (C E); 100 μm (F H). Abbreviations: br, bristles; ca, common atrium; g, glands; gp, globular papillae; mc, muscles; mgd, male genital duct; ov, ovary; ph, pharynx; pv, prostate vesicle; s, stylet; sv, seminal vesicle; t, testis." figureDoi="10.3897/zse.100.125042.figure3" httpUri="https://binary.pensoft.net/fig/1175310">3 E</figureCitation>
,
<figureCitation id="D5A9445916E388DCBB7DE7960394427F" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Proschizorhynchella quadricaudata sp. nov., drawing based on a reference specimen (NSMT - Pl 6478). A. Whole body; B. Male copulatory organ with stylet. Scale bars: 300 μm (A); 100 μm (B). Abbreviations: b, bursa; c, cirrus; ca, common atrium; e, eye; g, glands; gb, globular papillae; mgd, male genital duct; oss, orange spherical structure; ov, ovary; ph, pharynx; pr, proboscis; pv, prostate vesicle; sd, seminal duct; st, stylet; sv, seminal vesicle; t, testis; v, vitellarium; w, whisker." figureDoi="10.3897/zse.100.125042.figure4" httpUri="https://binary.pensoft.net/fig/1175311">4 B</figureCitation>
: ov), and bursa located behind the common genital atrium.
</paragraph>
</subSubSection>
<subSubSection id="SECID0ER3AG" type="diagnosis">
<paragraph id="ADB467AFB0FE65D0BFFAE00536D8235D">
<heading id="41DF763C4C6E99CF91C8132325429D71" reason="title">Diagnosis.</heading>
</paragraph>
<paragraph id="6479CF9C76198BA4560EDFD8F15A87AC">
Species of
<taxonomicName id="B337B40AA2777E42AB99EECA4576606F" authorityName="Schilke" authorityYear="1970" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="genus">
<emphasis id="0CAA3C215CFFA0CE08F9ECBD65023A2B" italics="true">Proschizorhynchella</emphasis>
</taxonomicName>
with its tail end exhibiting four finger-like projections. Proboscis with a well-developed row of glands on each lip. Cone-shaped stylet ~ 100 μm long.
</paragraph>
</subSubSection>
<subSubSection id="SECID0E53AG" type="etymology">
<paragraph id="CBFB3EAC094425926BC70E5E71F7D2D2">
<heading id="FCE75881B07FE09D6C0D3B138254137E" reason="title">Etymology.</heading>
</paragraph>
<paragraph id="DD425228089B663C3D7A15CA2CB86EEF">
The specific name is derived from a Latin prefix “
<emphasis id="1B52C050487F1CF44739AA7D0577AE9D" italics="true">quadri</emphasis>
” + adjective “
<emphasis id="01064CDD8B61BC5D756CBBB440296487" italics="true">caudata</emphasis>
”, referring to the tail with four finger-like projections of the new species.
</paragraph>
</subSubSection>
<subSubSection id="SECID0EQ4AG" type="distribution">
<paragraph id="443B4EDC72571C7AA707FC7178CBBF5D">
<heading id="CD614AB32F7DF0CE36BB31A27C2B3731" reason="title">Distribution and habitat.</heading>
</paragraph>
<paragraph id="2F6405FAB9FDC15AAFCFE256F054BDF7">
Northern
<collectingCountry id="3D210A3165CC7D85B4D6C7BE2112F374" name="Japan">Japan</collectingCountry>
: Yoichi, on fine-grained sand, lower intertidal.
<collectingRegion id="92ABD439407B2294FDE05729F198E209">Central Japan</collectingRegion>
: Manazuru, on coarse sand with rocks, lower intertidal;
<location id="9AA675F66A5618DBA80BD6F54D6AF4C3" LSID="urn:lsid:plazi:treatment:C39A668E597E5A358BF2799B12B77496:9AA675F66A5618DBA80BD6F54D6AF4C3" country="Japan" name="Imaihama" stateProvince="Central Japan">Imaihama</location>
(type locality),
<collectedFrom id="CB5A6B7F9B9952725356BA3EA55844B4">on fine-grained sand, lower intertidal</collectedFrom>
; Mihama, on fine-grained sand, lower intertidal; and Ishibu, fine-grained sand, lower intertidal.
</paragraph>
</subSubSection>
<subSubSection id="SECID0EV4AG" type="remarks">
<paragraph id="93C8DED42DB6BE24B013A6AB1A978F05">
<heading id="A240F638ABBD5A6532A95FE08291E8FF" reason="title">Remarks.</heading>
</paragraph>
<paragraph id="2D330F1A5E34C5186150BC032D2BDC69">
The studied specimens show characteristics that, provisionally, allow us to include them within
<taxonomicName id="327C79C0FBBAAE80585240D7CE7ECF3C" authorityName="Schilke" authorityYear="1970" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="genus">
<emphasis id="DB3ED5AEC47A7F5A515D740AA17EEAA3" italics="true">Proschizorhynchella</emphasis>
</taxonomicName>
. Species of
<taxonomicName id="C6C408473D0FAE8A2850989790168657" authorityName="Schilke" authorityYear="1970" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="genus">
<emphasis id="F13C91BAA43498EF906C366403DB5EFA" italics="true">Proschizorhynchella</emphasis>
</taxonomicName>
are schizorhynchids characterized by a simple male copulatory bulb forming a spiny cirrus and / or one or two stylets. The stylets are simple funnel structures, spiralized plates, or bear ridges (
<bibRefCitation id="1215EE67F5BB281C5EC92E92F0073D22" DOI="10.1007/BF01630522" author="Schilke" firstAuthor="Schilke" journalOrPublisher="Helgoländer Meeresuntersuchungen" pagination="143-265" refId="B35" refString="Schilke K (1970) Kalyptorhynchia (Turbellaria) aus dem Eulitoral der deustschen Nordseeküste. Helgoländer Meeresuntersuchungen 21: 143265. https://doi.org/10.1007/BF01630522" title="Kalyptorhynchia (Turbellaria) aus dem Eulitoral der deustschen Nordseeküste." volume="21" year="1970">Schilke 1970</bibRefCitation>
;
<bibRefCitation id="8CF804A929EC8874C3CE8D005A7172E4" DOI="10.12782/specdiv.23.1" author="Takeda and Kajihara" firstAuthor="Takeda" journalOrPublisher="Species Diversity" pagination="1-11" refId="B40" refString="Takeda N, Kajihara H (2018) A new genus and five new species of Kalyptorhynchia (Platyhelminthes, Rhabdocoela) discovered in northern Japan. Species Diversity 23: 111. https://doi.org/10.12782/specdiv.23.1" title="A new genus and five new species of Kalyptorhynchia (Platyhelminthes, Rhabdocoela) discovered in northern Japan." volume="23" year="2018">Takeda and Kajihara 2018</bibRefCitation>
). The diagnostic characteristics provided by
<bibRefCitation id="7B0AAE3EF37001D27AC5C2C827EAB3CE" DOI="10.1007/BF01630522" author="Schilke K" firstAuthor="Schilke" journalOrPublisher="Helgoländer Meeresuntersuchungen" pagination="143-265" refId="B35" refString="Schilke K (1970) Kalyptorhynchia (Turbellaria) aus dem Eulitoral der deustschen Nordseeküste. Helgoländer Meeresuntersuchungen 21: 143265. https://doi.org/10.1007/BF01630522" title="Kalyptorhynchia (Turbellaria) aus dem Eulitoral der deustschen Nordseeküste." volume="21" year="1970">Schilke (1970)</bibRefCitation>
are shared by a group of species that likely belong to different genera (
<bibRefCitation id="B88B4632E0F04661AFC637F5E948B451" author="Noldt" firstAuthor="Noldt" journalOrPublisher="Microfauna Marina" pagination="347-370" refId="B27" refString="Noldt U (1985) Typhlorhynchus syltensis n. sp. (Schizorhynchia, Plathelminthes) and the Adelphotaxa-relationship of Typhlorhynchus and Proschizorhynchus. Microfauna Marina 2: 347370." title="Typhlorhynchus syltensis n. sp. (Schizorhynchia, Plathelminthes) and the Adelphotaxa-relationship of Typhlorhynchus and Proschizorhynchus." volume="2" year="1985">Noldt 1985</bibRefCitation>
;
<bibRefCitation id="2D4A2264368714FD438642C41A0500C2" DOI="10.1111/j.1463-6409.1989.tb00120.x" author="Karling" firstAuthor="Karling" issue="1" journalOrPublisher="Zoologica Scripta" pagination="19-32" refId="B22" refString="Karling TG (1989) New taxa of Kalyptorhynchia (Platyhelminthes) from the N. American Pacific coast. Zoologica Scripta 18 (1): 1932. https://doi.org/10.1111/j.1463-6409.1989.tb00120.x" title="New taxa of Kalyptorhynchia (Platyhelminthes) from the N. American Pacific coast." volume="18" year="1989">Karling 1989</bibRefCitation>
). As noted by
<bibRefCitation id="7A291609E4B0545D5E8C5E500CF4FB38" author="Noldt U" firstAuthor="Noldt" journalOrPublisher="Microfauna Marina" pagination="347-370" refId="B27" refString="Noldt U (1985) Typhlorhynchus syltensis n. sp. (Schizorhynchia, Plathelminthes) and the Adelphotaxa-relationship of Typhlorhynchus and Proschizorhynchus. Microfauna Marina 2: 347370." title="Typhlorhynchus syltensis n. sp. (Schizorhynchia, Plathelminthes) and the Adelphotaxa-relationship of Typhlorhynchus and Proschizorhynchus." volume="2" year="1985">Noldt (1985)</bibRefCitation>
, the only character differentiating species of
<taxonomicName id="93986C870490CA491BD35957D0881FC0" authorityName="Schilke" authorityYear="1970" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="genus">
<emphasis id="E08F1208C1955933F36CF7A9D5A03F88" italics="true">Proschizorhynchella</emphasis>
</taxonomicName>
from species of
<taxonomicName id="17CCAB44BC0F6187C2234E5B8D0ABF3E" authority="Meixner, 1928" authorityName="Meixner" authorityYear="1928" family="Schizorhynchidae" genus="Proschizorhynchus" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="genus">
<emphasis id="5D5F8C336F2E2DF177B09471E80DD443" italics="true">Proschizorhynchus</emphasis>
<bibRefCitation id="9329C8705BC58A6F625ADC65268F5BCD" author="Meixner J" journalOrPublisher="Zoologischer Anzeiger" pagination="229-253" refId="B25" refString="Meixner J (1928) Aberrante Kalyptorhynchia (Turbellaria, Rhabdocoela) aus dem Sande der Kieler Bucht. Zoologischer Anzeiger 77: 229 - 253." title="Aberrante Kalyptorhynchia (Turbellaria, Rhabdocoela) aus dem Sande der Kieler Bucht." volume="77" year="1928">Meixner, 1928</bibRefCitation>
</taxonomicName>
, is the lack of the curved stylet in the former. However, the presence of a sclerotized mouthpiece in the bursa of species of
<taxonomicName id="DE3678F587D0D6EDD2D585BC7F9B48B1" authorityName="Meixner" authorityYear="1928" family="Schizorhynchidae" genus="Proschizorhynchus" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="genus">
<emphasis id="84C498846F4B30865C02CB9BFD9EE43A" italics="true">Proschizorhynchus</emphasis>
</taxonomicName>
easily allows their differentiation from species of
<taxonomicName id="157715ED14488310373A3105772E29C8" authority="(Armonies 2023)" baseAuthorityName="Armonies" baseAuthorityYear="2023" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="genus">
<emphasis id="AB49E9861F6A51C1F6E78B5AEED918C1" italics="true">Proschizorhynchella</emphasis>
(
<bibRefCitation id="7DEEB6F131BD4F57E42B01AF71C77B1C" DOI="10.1007/s12526-022-01309-w" author="Armonies" firstAuthor="Armonies" issue="1" journalOrPublisher="Marine Biodiversity" pagination="17" refId="B1" refString="Armonies W (2023) Platyhelminth fauna of the Island of Sylt: a meta-analysis of distributional patterns and description of 19 new species. Marine Biodiversity 53 (1): 17. https://doi.org/10.1007/s12526-022-01309-w" title="Platyhelminth fauna of the Island of Sylt: a meta-analysis of distributional patterns and description of 19 new species." volume="53" year="2023">Armonies 2023</bibRefCitation>
)
</taxonomicName>
.
</paragraph>
<paragraph id="B69228ABF84AB4D32062180A6260CEA7">
<bibRefCitation id="3A06B8CC66716007BFF5929558B3FED4" DOI="10.1111/j.1463-6409.1989.tb00120.x" author="Karling TG" firstAuthor="Karling" issue="1" journalOrPublisher="Zoologica Scripta" pagination="19-32" refId="B22" refString="Karling TG (1989) New taxa of Kalyptorhynchia (Platyhelminthes) from the N. American Pacific coast. Zoologica Scripta 18 (1): 1932. https://doi.org/10.1111/j.1463-6409.1989.tb00120.x" title="New taxa of Kalyptorhynchia (Platyhelminthes) from the N. American Pacific coast." volume="18" year="1989">Karling (1989)</bibRefCitation>
elaborated more on the idea that
<taxonomicName id="154DAB282C750B62C9129F20E3C203F1" baseAuthorityName="Armonies" baseAuthorityYear="2023" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="genus">
<emphasis id="9FE7A11B615C005F09C47F5BE3180274" italics="true">Proschizorhynchella</emphasis>
</taxonomicName>
includes a paraphyletic group of species and questioned the use of the pharynx position and testes number to differentiate among schizorhynchid genera. However, these authors and posterior ones (
<bibRefCitation id="DDDCBAAA6C973ED195AB219D407E9F46" DOI="10.12782/specdiv.23.1" author="Takeda and Kajihara" firstAuthor="Takeda" journalOrPublisher="Species Diversity" pagination="1-11" refId="B40" refString="Takeda N, Kajihara H (2018) A new genus and five new species of Kalyptorhynchia (Platyhelminthes, Rhabdocoela) discovered in northern Japan. Species Diversity 23: 111. https://doi.org/10.12782/specdiv.23.1" title="A new genus and five new species of Kalyptorhynchia (Platyhelminthes, Rhabdocoela) discovered in northern Japan." volume="23" year="2018">Takeda and Kajihara 2018</bibRefCitation>
) did not refine the diagnosis of
<taxonomicName id="4165A152F101975A123DC486188B229A" baseAuthorityName="Armonies" baseAuthorityYear="2023" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="genus">
<emphasis id="35FD7E48707E58F59740DF0B16253C58" italics="true">Proschizorhynchella</emphasis>
</taxonomicName>
or make other taxonomical changes. Unfortunately, the morphological disparities among species of
<taxonomicName id="78FB242A41B1989D0D38C3B5CD63A810" baseAuthorityName="Armonies" baseAuthorityYear="2023" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="genus">
<emphasis id="16AAA2184F3E38BA07F78F0A5AD0E025" italics="true">Proschizorhynchella</emphasis>
</taxonomicName>
have not been tested through molecular phylogenetic analyses, and none of the 18 previously known species of the genus has been molecularly tested (see Discussion). Therefore, we refrain from updating the diagnosis of
<taxonomicName id="C82E4E776C6DA27415D187F649182775" baseAuthorityName="Armonies" baseAuthorityYear="2023" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="genus">
<emphasis id="B2F3C016517F54319BF06106CA80108B" italics="true">Proschizorhynchella</emphasis>
</taxonomicName>
until more molecular and morphological data are available to elaborate a comprehensive reclassification of this taxon.
</paragraph>
<paragraph id="FD637376B5284C766F6C9C2177B236BE">
Among the other 18 known species of
<taxonomicName id="B1CDFD8B7296036A13B1623C372D1516" baseAuthorityName="Armonies" baseAuthorityYear="2023" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="genus">
<emphasis id="ACAFFF6E8D06D1CC98BE67DA5B91A022" italics="true">Proschizorhynchella</emphasis>
</taxonomicName>
,
<taxonomicName id="F6379CA471A30FA3E0D5342FF9A46E2B" authorityName="Jimi &amp; Hookabe &amp; Imura &amp; Diez" authorityYear="2024" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="quadricaudata" status="sp. nov.">
<emphasis id="8792C4BE9620D720F60C3BC5359A6518" italics="true">P. quadricaudata</emphasis>
</taxonomicName>
<taxonomicNameLabel id="62793D8538C9F14C4ECA8209B2270727" rank="species">sp. nov.</taxonomicNameLabel>
can easily be differentiated because of the four finger-like projections of its posterior end, a characteristic not present in its congeners. The row of glands that opens along its proboscis lips is also unique in this species, and this character has only been reported for an undescribed species of
<taxonomicName id="1FAEAE20668480F6DAD1FCD0F8F4AFBF" baseAuthorityName="Armonies" baseAuthorityYear="2023" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="genus">
<emphasis id="971DBC94E22AAA9A8AC6D35A952769C7" italics="true">Proschizorhynchella</emphasis>
</taxonomicName>
(see
<bibRefCitation id="5EEE703841029659C18E1862182DEDDB" DOI="10.1093/icb/icv056" author="Smith III" etAl="et al." firstAuthor="Smith III" journalOrPublisher="Integrative and Comparative Biology" pagination="1-12" refId="B37" refString="Smith III JP, Litvaitis MK, Gobert S, Uyeno T, Artois T (2015) Evolution and functional morphology of the proboscis in Kalyptorhynchia (Platyhelminthes). Integrative and Comparative Biology 55: 112. https://doi.org/10.1093/icb/icv056" title="Evolution and functional morphology of the proboscis in Kalyptorhynchia (Platyhelminthes)." volume="55" year="2015">Smith III et al. 2015</bibRefCitation>
: Fig.
<figureCitation id="CB1EE657D1467F5D65125B124CEAB921" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Proschizorhynchella quadricaudata sp. nov., live specimen, (A F) reference specimen (NSMT - Pl 6478), (G, H) holotype (NSMT - Pl 6475). A. Anterior end; B. Proboscis with glands row; C. DIC view of proboscis with glands row (indicated by arrow); D. Midbody area; adhesive papillae are indicated by dashed lines (indicated by arrow); E. Overview of reproductive organs; F. Copulatory organ and common atrium; G. Pharynx; H. Tail with four finger-like projections. Scale bars: 200 μm (A); 100 μm (B); 200 μm (C E); 100 μm (F H). Abbreviations: br, bristles; ca, common atrium; g, glands; gp, globular papillae; mc, muscles; mgd, male genital duct; ov, ovary; ph, pharynx; pv, prostate vesicle; s, stylet; sv, seminal vesicle; t, testis." figureDoi="10.3897/zse.100.125042.figure3" httpUri="https://binary.pensoft.net/fig/1175310">3 A</figureCitation>
).
</paragraph>
<paragraph id="66A60821D13756676EE82E17386FFE1E">
Other characteristics are very variable among species of
<taxonomicName id="E462716807048BDD6CB183D7E659B449" baseAuthorityName="Armonies" baseAuthorityYear="2023" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="genus">
<emphasis id="1E3F4455B0C64F0D4FD55A850DF7EA7B" italics="true">Proschizorhynchella</emphasis>
</taxonomicName>
(see
<bibRefCitation id="E08D254ECAAFB5446AD4185AE5E4FCDA" DOI="10.12782/specdiv.23.1" author="Takeda and Kajihara" firstAuthor="Takeda" journalOrPublisher="Species Diversity" pagination="1-11" refId="B40" refString="Takeda N, Kajihara H (2018) A new genus and five new species of Kalyptorhynchia (Platyhelminthes, Rhabdocoela) discovered in northern Japan. Species Diversity 23: 111. https://doi.org/10.12782/specdiv.23.1" title="A new genus and five new species of Kalyptorhynchia (Platyhelminthes, Rhabdocoela) discovered in northern Japan." volume="23" year="2018">Takeda and Kajihara 2018</bibRefCitation>
). Most species have two eyes, two testes, and one gonopore. However, the number of adhesive belts varies from 0 to 3.
<taxonomicName id="B385009D58AA78A52BEBC5B0DA574EC6" authorityName="Jimi &amp; Hookabe &amp; Imura &amp; Diez" authorityYear="2024" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="quadricaudata" status="sp. nov.">
<emphasis id="E5B9DFDFDD8D7460F3DFB422F3D725F1" italics="true">Proschizorhynchella quadricaudata</emphasis>
</taxonomicName>
<taxonomicNameLabel id="5958678B968DDD05FD5AEEE3EB319DCD" rank="species">sp. nov.</taxonomicNameLabel>
exhibits a single adhesive belt at the level of the pharynx. Only three other species of
<taxonomicName id="466D52626B362CC856A6D2105F024731" baseAuthorityName="Armonies" baseAuthorityYear="2023" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="genus">
<emphasis id="F6BF5D68005F292818CDC69A69D7954D" italics="true">Proschizorhynchella</emphasis>
</taxonomicName>
present a single belt:
<taxonomicName id="BB57D758072C0C1224004022B80F6870" authority="Schilke, 1970" authorityName="Schilke" authorityYear="1970" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="bivaginata">
<emphasis id="F3B06DDB75A96532DB78875861287AE2" italics="true">P. bivaginata</emphasis>
<bibRefCitation id="F20771D96A20F6095E38695001A79666" DOI="10.1007/BF01630522" author="Schilke K" journalOrPublisher="Helgoländer Meeresuntersuchungen" pagination="143-265" refId="B35" refString="Schilke K (1970) Kalyptorhynchia (Turbellaria) aus dem Eulitoral der deustschen Nordseekuste. Helgolander Meeresuntersuchungen 21: 143 - 265. https: // doi. org / 10.1007 / BF 01630522" title="Kalyptorhynchia (Turbellaria) aus dem Eulitoral der deustschen Nordseeküste." volume="21" year="1970">Schilke, 1970</bibRefCitation>
</taxonomicName>
;
<taxonomicName id="FEEA0D4FB7A9556AA3667036C04CCF88" authority="Noldt, 1989" authorityName="Noldt" authorityYear="1989" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="robusta">
<emphasis id="482EE6A9AE7D82FD2E26D2F8E32ADEC6" italics="true">P. robusta</emphasis>
<bibRefCitation id="AA2F177C24598793BF04140F0B7FF862" author="Noldt U" journalOrPublisher="Microfauna Marina" pagination="7-85" refId="B29" refString="Noldt U (1989) Kalyptorhynchia (Platyhelminthes) from sublittoral coastal areas near the island of Sylt (North Sea). I. Schizorhynchia. Microfauna Marina 5: 7 - 85." title="Kalyptorhynchia (Platyhelminthes) from sublittoral coastal areas near the island of Sylt (North Sea). I. Schizorhynchia." volume="5" year="1989">Noldt, 1989</bibRefCitation>
</taxonomicName>
; and
<taxonomicName id="84E33E2236A350B15F938BC0FA2C66AE" authority="Karling, 1989" authorityName="Karling" authorityYear="1989" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="schilkei">
<emphasis id="3BB4EB7F38334D05D3033BFF6EE58AD0" italics="true">P. schilkei</emphasis>
<bibRefCitation id="A2682C1759B17C2452E924C736D314A5" DOI="10.1111/j.1463-6409.1989.tb00120.x" author="Karling TG" issue="1" journalOrPublisher="Zoologica Scripta" pagination="19-32" refId="B22" refString="Karling TG (1989) New taxa of Kalyptorhynchia (Platyhelminthes) from the N. American Pacific coast. Zoologica Scripta 18 (1): 19 - 32. https: // doi. org / 10.1111 / j. 1463 - 6409.1989. tb 00120. x" title="New taxa of Kalyptorhynchia (Platyhelminthes) from the N. American Pacific coast." volume="18" year="1989">Karling, 1989</bibRefCitation>
</taxonomicName>
.
<taxonomicName id="E4CFA8C2642286BBF0CF51746CE46456" authorityName="Schilke" authorityYear="1970" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="bivaginata">
<emphasis id="AAB065DCB8CF9919774BF52FA8178075" italics="true">Proschizorhynchella bivaginata</emphasis>
</taxonomicName>
is unique among these species because it has a cirrus in the copulatory bulb, whereas the other species have a stylet.
<taxonomicName id="272357BD3D867912AFF9C2D896F752FE" authorityName="Karling" authorityYear="1989" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="schilkei">
<emphasis id="E3AAE9FF85BD3170D02BA2615ED35ADD" italics="true">Proschizorhynchella schilkei</emphasis>
</taxonomicName>
has two pairs of testes, and its stylet is a curved, comma-shaped hook, while
<taxonomicName id="61FAC7FEC806B22A3026E7EDF8164F3C" authorityName="Noldt" authorityYear="1989" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="robusta">
<emphasis id="A40F86EEBD4DFE3F29F219EF951FA20B" italics="true">P. robusta</emphasis>
</taxonomicName>
has a spiralized stylet (
<bibRefCitation id="216C1643625373EEEE49BF5BFDF6D498" DOI="10.1111/j.1463-6409.1989.tb00120.x" author="Karling" firstAuthor="Karling" issue="1" journalOrPublisher="Zoologica Scripta" pagination="19-32" refId="B22" refString="Karling TG (1989) New taxa of Kalyptorhynchia (Platyhelminthes) from the N. American Pacific coast. Zoologica Scripta 18 (1): 1932. https://doi.org/10.1111/j.1463-6409.1989.tb00120.x" title="New taxa of Kalyptorhynchia (Platyhelminthes) from the N. American Pacific coast." volume="18" year="1989">Karling 1989</bibRefCitation>
;
<bibRefCitation id="EB349A88BC31ED3914A8F8F24D47915C" author="Noldt" firstAuthor="Noldt" journalOrPublisher="Microfauna Marina" pagination="7-85" refId="B29" refString="Noldt U (1989) Kalyptorhynchia (Platyhelminthes) from sublittoral coastal areas near the island of Sylt (North Sea). I. Schizorhynchia. Microfauna Marina 5: 785." title="Kalyptorhynchia (Platyhelminthes) from sublittoral coastal areas near the island of Sylt (North Sea). I. Schizorhynchia." volume="5" year="1989">Noldt 1989</bibRefCitation>
). In contrast, the stylet of
<taxonomicName id="9C4BB7921FCF8A95002EBA28659F4322" authorityName="Jimi &amp; Hookabe &amp; Imura &amp; Diez" authorityYear="2024" family="Schizorhynchidae" genus="Proschizorhynchella" kingdom="Animalia" order="Rhabdocoela" phylum="Platyhelminthes" rank="species" species="quadricaudata" status="sp. nov.">
<emphasis id="C4FFED8848874CABBD764AC1A302E84F" italics="true">P. quadricaudata</emphasis>
</taxonomicName>
<taxonomicNameLabel id="6F08CA607F6C6DCD0E52D597EDB32F1E" rank="species">sp. nov.</taxonomicNameLabel>
is a simple and more or less straight tube.
</paragraph>
</subSubSection>
</treatment>
</document>