176 lines
17 KiB
XML
176 lines
17 KiB
XML
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<mods:title id="6D619607258C6BABD125B1D72685E86E">Taxonomy of North European Lumbricillus (Clitellata, Enchytraeidae)</mods:title>
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<mods:namePart id="D6A9974A034FFE4519285538BAE18CC2">Klinth, Marten J.</mods:namePart>
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<mods:namePart id="0151A10ADF970DC532A5C5F41FEC7796">Rota, Emilia</mods:namePart>
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<mods:namePart id="D2CC3CE2574B097F7A4A735FBEE45817">Erseus, Christer</mods:namePart>
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<mods:date id="00570FBFB3F8308577CC78C05A969042">2017</mods:date>
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<mods:number id="B8B7F6166C85615ABFADD5012A0A5E03">703</mods:number>
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<mods:classification id="D7EE8D8CB8F5A5EE7659FDCEA4FDD323">journal article</mods:classification>
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<mods:identifier id="39E35188A36E095A0155B9967FFF9D7D" type="DOI">http://dx.doi.org/10.3897/zookeys.703.13385</mods:identifier>
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<treatment id="FE3BE4E3584FDAA8CF05438CCDE01C73" ID-GBIF-Taxon="134860648" LSID="urn:lsid:plazi:treatment:FE3BE4E3584FDAA8CF05438CCDE01C73" httpUri="http://treatment.plazi.org/id/FE3BE4E3584FDAA8CF05438CCDE01C73" lastPageNumber="30" pageId="15" pageNumber="30">
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<subSubSection id="5FD83A038001ADE92C62F7B91D08828D" pageId="15" pageNumber="30" type="nomenclature">
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<paragraph id="82A04082F3E8F532DBF44EBA75044BF0" pageId="15" pageNumber="30">
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<taxonomicName id="1AAFB06D6330A63068EE5B210D382F94" ID-CoL="7325S" authority="Stephenson, 1932" authorityName="Stephenson" authorityYear="1932" class="Clitellata" family="Enchytraeidae" genus="Lumbricillus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Lumbricillus pumilio" order="Enchytraeida" pageId="15" pageNumber="30" phylum="Annelida" rank="species" species="pumilio">Lumbricillus pumilio Stephenson, 1932</taxonomicName>
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Fig. 11
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</paragraph>
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</subSubSection>
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<subSubSection id="61287F893433E6553CF6513AE2681219" pageId="15" pageNumber="30" type="reference_group">
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<paragraph id="F8071C243B262EFA7E67BE19930A4F1F" pageId="15" pageNumber="30">
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<taxonomicName id="3E2637CBE7AEBA0546D3472F32F9A671" class="Clitellata" family="Enchytraeidae" genus="Lumbricillus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Lumbricillus pumilio" order="Enchytraeida" pageId="15" pageNumber="30" phylum="Annelida" rank="species" species="pumilio">Lumbricillus pumilio</taxonomicName>
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Stephenson, 1932a: pp. 902-904, figs 1-3;
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<bibRefCitation id="CAEA1E316BC311423FF6BA6BEBA5DCA0" pageId="15" pageNumber="30">Nielsen and Christensen 1959</bibRefCitation>
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: p. 96;
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<bibRefCitation id="1CF8570B4DFCF78E75CCFDC158DF7D6F" author="Tynen, MJ" journalOrPublisher="Annales Zoologici Fennici" pageId="49" pageNumber="64" pagination="150 - 155" title="A key to the European littoral Enchytraeidae (Oligochaeta)." volume="6" year="1969">Tynen and Nurminen 1969</bibRefCitation>
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: pp. 151-153;
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<bibRefCitation id="1C89B02A645BE26D75991FE28D63D636" author="Klinth, MJ" journalOrPublisher="Zoologica Scripta" pageId="46" pageNumber="61" pagination="96 - 110" title="Phylogeny and species delimitation of North European Lumbricillus (Clitellata, Enchytraeidae)." url="https://doi.org/10.1111/zsc.12187" volume="46" year="2017">Klinth et al. 2017</bibRefCitation>
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.
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</paragraph>
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<paragraph id="EDF3FCAFD691B26C14DFE49B9D363ABF" pageId="15" pageNumber="30">
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<taxonomicName id="56F8F7EB49B18EBE9C66914469F54FC8" class="Clitellata" family="Enchytraeidae" genus="Lumbricillus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Lumbricillus pumillio" order="Enchytraeida" pageId="15" pageNumber="30" phylum="Annelida" rank="species" species="pumillio">Lumbricillus pumillio</taxonomicName>
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(sic);
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<bibRefCitation id="FECD5AF2B9B31EA30EF94B940B4F8B5C" author="Erseus, C" journalOrPublisher="Zoologica Scripta" pageId="45" pageNumber="60" pagination="5 - 11" title="Littoral Oligochaeta (Annelida) from Eyjafjoerour, North Coast of Iceland." url="https://doi.org/10.1111/j.1463-6409.1976.tb00677.x" volume="5" year="1976">
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<normalizedToken id="2D647C79E21BB273F39A01820988BAB1" originalValue="Erséus">Erseus</normalizedToken>
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1976
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||
</bibRefCitation>
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: p. 9.
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</paragraph>
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</subSubSection>
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<subSubSection id="41997A500A22C584E25377E1CF88EB8A" pageId="15" pageNumber="30" type="type material">
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<paragraph id="A8C86412B998181920C5F49C7833DB6E" pageId="15" pageNumber="30">Type material.</paragraph>
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<paragraph id="D3819F959A96C77B96E8C48F1F8C1C52" pageId="15" pageNumber="30">
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Typus amissus (Nomenclatura Oligochaetologica). Type locality: Wembury Bay, Plymouth, United Kingdom (
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<bibRefCitation id="54221604FA892C5FCACC72C5B842A266" author="Stephenson, J" journalOrPublisher="Proceedings of the Zoological Society of London" pageId="49" pageNumber="64" pagination="899 - 941" title="Oligochaeta from Australia, North Carolina, and other parts of the world." url="https://doi.org/10.1111/j.1096-3642.1932.tb01571.x" volume="1932" year="1932 a">Stephenson 1932a</bibRefCitation>
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). We did not designate a neotype as we do not have material from the type locality.
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</paragraph>
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</subSubSection>
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<subSubSection id="528CD56A6DA16D5D60F6FE13E40CB890" pageId="15" pageNumber="30" type="materials_examined">
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<paragraph id="A5FC00EC86720098E54EF242EA90082D" pageId="15" pageNumber="30">Material examined.</paragraph>
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<paragraph id="4F647F25F25829CA01225FDA698245AE" pageId="15" pageNumber="30">SMNH 152775 (CE3346), SMNH 152776 (CE3347), SMNH 152777 (CE3427), SMNH 152778 (CE3428), SMNH 152779 (CE3430), SMNH 152780 (CE3436) & SMNH 152781 (CE3437), seven mature specimens from the United Kingdom. For information on specimen collection localities and GenBank accession numbers see Appendix 1.</paragraph>
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</subSubSection>
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<subSubSection id="7D4837A4B39755B86722A3999710831D" pageId="15" pageNumber="30" type="description">
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<paragraph id="8222F094724F7405FE642E822F90697F" pageId="15" pageNumber="30">Description.</paragraph>
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<paragraph id="66421D811D20B069156DBFA0676ADA26" pageId="15" pageNumber="30">
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Short and stout worms. Colour unknown. Length (fixed worms) more than 1.7-3.2 mm (amputated specimens), first 15 segments 1.3-2.3 mm long, width at clitellum 0.24-0.38 mm. More than 15-23 segments. Chaetae slightly sigmoid (Fig. 11A). Dorsal bundles with 3-6 chaetae anterior to clitellum, 3-5 chaetae in postclitellar segments. Ventral bundles with 3-6, rarely 2 or 7, chaetae anterior to clitellum, 3-6 chaetae, rarely 2, posteriorly. Each
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<normalizedToken id="0AAD58653844D121F8061C2F446D92EC" originalValue="worm’s">worm's</normalizedToken>
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longest measured chaetae 36-48
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<normalizedToken id="FE57DFBA91F10FE551365DA4E9082A41" originalValue="µm">µm</normalizedToken>
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long and about 2.5
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<normalizedToken id="98984626003293104D56B91283D81764" originalValue="µm">µm</normalizedToken>
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wide. Clitellum extending over
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<normalizedToken id="1C77F9AE119997682EE5AB0A887354D2" originalValue="XII–">XII-</normalizedToken>
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1/2XIII. Head pore not observed. Epidermis with transverse rows of gland cells.
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</paragraph>
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<paragraph id="FE3E304352A82C54A639C05C7A55B8D9" pageId="15" pageNumber="30">
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Coelomocytes difficult to identify as such in this species, but small round, oval or spindle-shaped granulated cells about 5-7
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<normalizedToken id="8D1C36A88AEA42C875F19EDB3E517CA6" originalValue="µm">µm</normalizedToken>
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long were noted in the coelomic cavity. Paired pharyngeal glands present in IV, V and VI; each pair converging dorsally (Fig. 11B). Dorsal vessel originating in XII or XIII. Nephridia observed in IX and
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<normalizedToken id="B3CDC7BDB452FA2073103EAA6576CA93" originalValue="XV–XVIII">XV-XVIII</normalizedToken>
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, about 45-50
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<normalizedToken id="ED1167C850094128FB4501AD1133FC53" originalValue="µm">µm</normalizedToken>
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long. Anteseptale small, consisting of funnel only. Postseptale oval, tapering posteriorly into efferent duct. Brain longer than wide, with a marked posterior incision creating two horn-like structures.
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</paragraph>
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<paragraph id="AEDC3D114CAE99E9F44EB483B0CADFED" pageId="15" pageNumber="30">
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Male genitalia paired (Fig. 11D). Testes originating in XI, extending forwards into X, with testis sacs forming regular club-shaped lobes. Sperm funnels in XI, 115-190
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<normalizedToken id="0107DAC115DAC74D08DA05FC8A5344E2" originalValue="µm">µm</normalizedToken>
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long, 65-140
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<normalizedToken id="A0E0AA4FD883FFD8BB9D97C0DA109FF8" originalValue="µm">µm</normalizedToken>
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wide making them about 1.5-2 times longer than wide, funnels tapering towards vasa deferentia. Most of vasa deferentia irregularly coiled in XII together with ovaries, vasa 5-10
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<normalizedToken id="F09602E0D4A7D22932B414A3C00F6CAF" originalValue="µm">µm</normalizedToken>
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wide. Penial bulbs round, 55-80
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<normalizedToken id="B0CC0B774B392DE58C2AE2EE8F814ED1" originalValue="µm">µm</normalizedToken>
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in diameter. One or two mature eggs present at a time.
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</paragraph>
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<paragraph id="478202B64627D9670DD0EEEDF4C07F39" pageId="15" pageNumber="30">
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Spermathecae (Fig. 11C) in V, spindle-shaped. Ectal duct short, ampulla indistinct, lumen of ampulla usually filled with sperm, ental duct connected to oesophagus. Ampulla usually making a sharp bend caudad towards oesophagus at about half its length. Spermathecae 100-150
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<normalizedToken id="DDEC4952AA396EACA2A3F71B25501B43" originalValue="µm">µm</normalizedToken>
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long, 30-50
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<normalizedToken id="B95E380F66310328397D1AA0B1610B9C" originalValue="µm">µm</normalizedToken>
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wide at widest part of ampulla. Ectal pore surrounded by compact, roundish mass of gland cells; whole glandular body 45-110
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<normalizedToken id="F6372D9C1D55AEEB8D87CDDBFCD0EBF9" originalValue="µm">µm</normalizedToken>
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in diameter at its widest part. One midventral subneural gland in XIV, 60-90
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<normalizedToken id="F8A9D3FA1C1A9E5650B378162EC50928" originalValue="µm">µm</normalizedToken>
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long.
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</paragraph>
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<caption id="9C31A7E594EDF9EFF895FBC44EB266F1" pageId="15" pageNumber="30">
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<paragraph id="C7FABEB6F0453EB594447174E3DDFF67" pageId="15" pageNumber="30">
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Figure 11.
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<taxonomicName id="40FC5F489D24098D7A71193D4ECFEEAB" class="Clitellata" family="Enchytraeidae" genus="Lumbricillus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Lumbricillus pumilio" order="Enchytraeida" pageId="15" pageNumber="30" phylum="Annelida" rank="species" species="pumilio">Lumbricillus pumilio</taxonomicName>
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. A Chaetal bundle B Anterior body C Spermatheca D Other genitalia. Abbreviations under general notes. Scale bars: 100
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<normalizedToken id="A417EE82689FD488AFC3483EA3AC45C3" originalValue="µm">µm</normalizedToken>
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.
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection id="00B3A233932665207FD621FB61F1DF87" pageId="15" pageNumber="30" type="distribution">
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<paragraph id="6D8C1B444E1892E53FB8330565107CD7" pageId="15" pageNumber="30">Geographical distribution.</paragraph>
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<paragraph id="7FDFC6CA6FFC048BB671FF9E39837D2B" pageId="15" pageNumber="30">
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Genetically identified from the United Kingdom. Also reported and briefly described from Iceland (
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<bibRefCitation id="76D3FE0A8296FD76BAA89FD609BC1753" author="Erseus, C" journalOrPublisher="Zoologica Scripta" pageId="45" pageNumber="60" pagination="5 - 11" title="Littoral Oligochaeta (Annelida) from Eyjafjoerour, North Coast of Iceland." url="https://doi.org/10.1111/j.1463-6409.1976.tb00677.x" volume="5" year="1976">
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<normalizedToken id="B675ABFC92C4137666C7C0856247D7C3" originalValue="Erséus">Erseus</normalizedToken>
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1976
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</bibRefCitation>
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).
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</paragraph>
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</subSubSection>
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<subSubSection id="56FAF6A028BBB4953A42A47F74A62044" pageId="15" pageNumber="30" type="remarks">
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<paragraph id="4E75FA3E7CB30E124E9CE0E23C4F43DC" pageId="15" pageNumber="30">Remarks.</paragraph>
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<paragraph id="9B8F4E93156863631FD645102FD43488" pageId="15" pageNumber="30">
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Our measurements of the coelomic corpuscles (5-7
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<normalizedToken id="B862190BFBF92BE9E310904B8D09D454" originalValue="µm">µm</normalizedToken>
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long) contradict the original description where they are described as being 20-28
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<normalizedToken id="BCA775EA34553FBFC7143D7D37401C7A" originalValue="µm">µm</normalizedToken>
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. This could either be due to a high degree of variation in this trait or that we are comparing non-homologous cell types. The smaller subneural gland in XV described by Stephenson could not be distinguished, either because of its small size or because it was absent. Despite a few discrepancies from the original description the small body size of the worms together with the shape of the spermathecae and other reproductive organs supports that the sampled specimens belong to
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<taxonomicName id="9EE61E4DEB52BAC9601639DEA99152CF" lsidName="L. pumilio" pageId="15" pageNumber="30" rank="species" species="pumilio">L. pumilio</taxonomicName>
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.
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</paragraph>
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<paragraph id="FAEC6982CD5CCBA00819855641CEF774" pageId="15" pageNumber="30">
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<taxonomicName id="BFE265E5DF6BB0F7D21147632077A164" class="Clitellata" family="Enchytraeidae" genus="Lumbricillus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Lumbricillus pumilio" order="Enchytraeida" pageId="15" pageNumber="30" phylum="Annelida" rank="species" species="pumilio">Lumbricillus pumilio</taxonomicName>
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is genetically closely related to
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<taxonomicName id="E5038807A6CC3FEC31B8515CC1012DB3" lsidName="L. rubidus" pageId="15" pageNumber="30" rank="species" species="rubidus">L. rubidus</taxonomicName>
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Finogenova & Streltsov, 1978 (Fig. 1), with which it also shares morphological similarities. However,
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<taxonomicName id="29D4EA4239AA5160216A4D080EFCE81A" lsidName="L. pumilio" pageId="15" pageNumber="30" rank="species" species="pumilio">L. pumilio</taxonomicName>
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is generally smaller than
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<taxonomicName id="F6E59FBDA438ABD55E5D4572226781E8" lsidName="L. rubidus" pageId="15" pageNumber="30" rank="species" species="rubidus">L. rubidus</taxonomicName>
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, and it does not have an as distinct muscular covering of the spermathecal ectal duct as that of the latter (compare Figs 11 and 12).
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |