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<document id="5208AFEF1798F018A948AB08DF7994EB" ID-DOI="10.11646/zootaxa.5589.1.8" ID-ISSN="1175-5326" ID-Zenodo-Dep="14897300" ID-ZooBank="67037631-FF92-4807-9AEE-F229AB159A1D" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="felipe" IM.materialsCitations_approvedBy="valdenar" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="felipe" checkinTime="1740006490803" checkinUser="plazi" docAuthor="Dózsa-Farkas, Klára & Makarova, Olga" docDate="2025" docId="03919F59FF82A374FF7015062806FE4D" docLanguage="en" docName="zootaxa.5589.1.8.pdf" docOrigin="Zootaxa 5589 (1)" docSource="https://doi.org/10.11646/zootaxa.5589.1.8" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Mesenchytraeus tschukotensis Dozsa-Farkas 2025, sp. nov." docType="treatment" docVersion="3" lastPageNumber="87" masterDocId="FFA8E721FF81A373FFE71644290AFFC4" masterDocTitle="A new species of the enchytraeid genus Mesenchytraeus Eisen, 1878 (Clitellata, Enchytraeidae) from the eastern Chukot Peninsula, Russian Far East, as further evidence of former trans-Beringian faunal connections" masterLastPageNumber="90" masterPageNumber="80" pageNumber="83" updateTime="1740499508670" updateUser="valdenar" zenodo-license-document="CLOSED">
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<mods:titleInfo id="AFA13C6616EB61F02D4C69B670D2EAD5">
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<mods:title id="C6D184E8A343BCDFFF2CAE041BC2CBC9">A new species of the enchytraeid genus Mesenchytraeus Eisen, 1878 (Clitellata, Enchytraeidae) from the eastern Chukot Peninsula, Russian Far East, as further evidence of former trans-Beringian faunal connections</mods:title>
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<mods:roleTerm id="C13B604C38821C33BBB0148BF369C39C">Author</mods:roleTerm>
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<mods:namePart id="0EBD2F967E32C8CBEF5674B596822317">Dózsa-Farkas, Klára</mods:namePart>
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<mods:affiliation id="2A6325FC6A38755A3AC3D5027178CA39">Dept. of Systematic Zoology and Ecology, Eötvös Lorand University, Budapest 1117, Hungary</mods:affiliation>
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<mods:roleTerm id="36B7ACD8CCA43B4F26DB1325A881CFAB">Author</mods:roleTerm>
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</mods:role>
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<mods:namePart id="24031825B2CBA1E582B3E95040B6D4A6">Makarova, Olga</mods:namePart>
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<mods:affiliation id="ABF6D99E68385C87DF62C683D5DD67B9">Severtsov Institute of Ecology and Evolution, Moscow 119071, Russia</mods:affiliation>
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<mods:title id="CEE989EE6DB1D7930A54C69F8B58BF62">Zootaxa</mods:title>
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<mods:date id="56060C8D2E90F948DA7C8486051A0AD0">2025</mods:date>
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<mods:number id="CF537D9365905C3C2E7F174ECF1E00DA">2025-02-19</mods:number>
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<mods:number id="A96A36A27C9A75B1FA90F22FFD2D2D45">5589</mods:number>
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<mods:number id="397311D44BFFC4127232847E587F156A">1</mods:number>
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<mods:url id="B89C562A1DA651DEE2DA364BF61F2563">https://doi.org/10.11646/zootaxa.5589.1.8</mods:url>
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<mods:classification id="CCB43B8689C02D726753E0602C598072">journal article</mods:classification>
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<mods:identifier id="44F77424C9C38AEE6DF911527A290EDF" type="DOI">10.11646/zootaxa.5589.1.8</mods:identifier>
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<mods:identifier id="6F4E3EE0AD95FAE27A940D810FBFE82C" type="ISSN">1175-5326</mods:identifier>
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<mods:identifier id="537F19DF03A07D7578DACADABE9F870C" type="Zenodo-Dep">14897300</mods:identifier>
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<mods:identifier id="F45A60BCAB4B6CEB728856DA73D0F76C" type="ZooBank">67037631-FF92-4807-9AEE-F229AB159A1D</mods:identifier>
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<treatment id="03919F59FF82A374FF7015062806FE4D" LSID="urn:lsid:plazi:treatment:03919F59FF82A374FF7015062806FE4D" httpUri="http://treatment.plazi.org/id/03919F59FF82A374FF7015062806FE4D" lastPageId="7" lastPageNumber="87" pageId="3" pageNumber="83">
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<subSubSection id="C3227DC4FF82A370FF7015062A2AFC99" box="[151,800,834,861]" pageId="3" pageNumber="83" type="nomenclature">
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<paragraph id="8B872E4FFF82A370FF7015062A2AFC99" blockId="3.[151,800,834,897]" box="[151,800,834,861]" pageId="3" pageNumber="83">
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<heading id="D0CF9923FF82A370FF7015062A2AFC99" bold="true" box="[151,800,834,861]" fontSize="11" level="1" pageId="3" pageNumber="83" reason="1">
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<emphasis id="B94CF25DFF82A370FF7015062A2AFC99" bold="true" box="[151,800,834,861]" pageId="3" pageNumber="83">
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<taxonomicName id="4C3855CCFF82A370FF7015062BB1FC99" authority="Dozsa-Farkas" authorityName="Dozsa-Farkas" authorityYear="2025" box="[151,699,834,861]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="3" pageNumber="83" phylum="Annelida" rank="species" species="tschukotensis" status="sp. nov.">
|
||||
<emphasis id="B94CF25DFF82A370FF7015062B0DFC99" bold="true" box="[151,519,834,861]" italics="true" pageId="3" pageNumber="83">Mesenchytraeus tschukotensis</emphasis>
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||||
Dózsa-Farkas
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||||
</taxonomicName>
|
||||
<taxonomicNameLabel id="A27F4F26FF82A370FD2515072A2AFC99" box="[706,800,835,861]" pageId="3" pageNumber="83" rank="species">sp. nov.</taxonomicNameLabel>
|
||||
</emphasis>
|
||||
</heading>
|
||||
</paragraph>
|
||||
</subSubSection>
|
||||
<subSubSection id="C3227DC4FF82A370FF7015232825FC45" box="[151,303,871,897]" pageId="3" pageNumber="83" type="description">
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<paragraph id="8B872E4FFF82A370FF7015232825FC45" blockId="3.[151,800,834,897]" box="[151,303,871,897]" pageId="3" pageNumber="83">
|
||||
(
|
||||
<figureCitation id="130332CAFF82A370FF7815232806FC45" box="[159,268,871,897]" captionStart="FIGURE 2" captionStartId="4.[152,255,1417,1441]" captionTargetBox="[188,1399,237,1393]" captionTargetId="figure-58@4.[188,1399,237,1393]" captionTargetPageId="4" captionText="FIGURE 2. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Pigmented forepart of the body, dorsal view. B. Clitellar glands, dorsal view. C. Lateral chaetae in IV. D. Larger lateral chaetae in VIII. E. Ventral chaetae in VIII. F. Ventral chaetae in LVI. G. Chloragogen cells (dorsal vessel marked with arrow). H. Parasites (Selenidiidae) in intestine. I. Nephridium. J. Dissected sperm funnel. Scale bars A–H 50 μm, I–J 200 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897304" httpUri="https://zenodo.org/record/14897304/files/figure.png" pageId="3" pageNumber="83">Figures 2</figureCitation>
|
||||
,
|
||||
<figureCitation id="130332CAFF82A370FEFF1523282CFC45" box="[280,294,871,897]" captionStart="FIGURE 3" captionStartId="5.[152,255,1720,1744]" captionTargetBox="[198,1390,181,1696]" captionTargetId="figure-35@5.[198,1390,181,1696]" captionTargetPageId="5" captionText="FIGURE 3. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Sperm duct (the cilia well visible). B–C. Male copulatory organs (a=atrium, atrial glands marked with white arrows and penial glands, marked with black arrows). D. Clitellar glands (bursal slits, marked with arrows) ventral view from outside. E. Sperm bundle. F. Ectal part of a spermatheca with two diverticula (ectal duct marked with white arrow, diverticula marked with black arrows). G. Prepared spermatheca of holotype (ectal duct marked with white arrow, diverticula marked with black arrows, a=ampulla). H. Spermathecal ectal part of holotype with three diverticula (marking is the same as in G). I. Distal part of spermathecal ectal duct (thicker part marked with white arrow. the canal marked with black arrow). J. Proximal part of spermathecal ectal duct only (canal marked with arrow, far wider than in distal part). K. Spermathecae in V–XI. L. Sperm in ampulla. C, G–J from holotype. Scale bars A–F, H–J, L 50 μm, G 200 μm, K 500 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897308" httpUri="https://zenodo.org/record/14897308/files/figure.png" pageId="3" pageNumber="83">3</figureCitation>
|
||||
)
|
||||
</paragraph>
|
||||
</subSubSection>
|
||||
<subSubSection id="C3227DC4FF82A370FF7015EB28CAFB01" pageId="3" pageNumber="83" type="materials_examined">
|
||||
<paragraph id="8B872E4FFF82A370FF7015EB28EAFBD5" blockId="3.[151,1437,942,2013]" pageId="3" pageNumber="83">
|
||||
<materialsCitation id="3B502412FF82A370FF7015EB28D6FBD5" latitude="65.59373" longitude="171.0252" pageId="3" pageNumber="83">
|
||||
<emphasis id="B94CF25DFF82A370FF7015EB2842FC0C" bold="true" box="[151,328,942,969]" pageId="3" pageNumber="83">Type material.</emphasis>
|
||||
<emphasis id="B94CF25DFF82A370FEB415EB28B0FC0D" box="[339,442,943,969]" italics="true" pageId="3" pageNumber="83">
|
||||
<typeStatus id="548390EDFF82A370FEB415EB28B0FC0D" box="[339,442,943,969]" pageId="3" pageNumber="83" type="holotype">Holotype</typeStatus>
|
||||
</emphasis>
|
||||
: M.
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||||
<emphasis id="B94CF25DFF82A370FE1115EB2B0EFC0D" bold="true" box="[502,516,943,969]" pageId="3" pageNumber="83">5</emphasis>
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||||
, slide
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<emphasis id="B94CF25DFF82A370FDB315EB2A00FC0C" bold="true" box="[596,778,942,969]" pageId="3" pageNumber="83">No. 3099a+b+c</emphasis>
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, adult, stained specimen.
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<emphasis id="B94CF25DFF82A370FBDE15EB2DC6FC0D" box="[1081,1228,943,969]" italics="true" pageId="3" pageNumber="83">Type locality</emphasis>
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||||
: North-East Asia, Chukot Peninsula, Lavrentiya vil. vicinity, litter in
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<taxonomicName id="4C3855CCFF82A370FD3D15972ABBFC28" baseAuthorityName="Richardson" baseAuthorityYear="1825" box="[730,945,979,1005]" class="Clitellata" family="Lumbricidae" genus="Urocytellus" kingdom="Animalia" order="Crassiclitellata" pageId="3" pageNumber="83" phylum="Annelida" rank="species" species="parryii">
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<emphasis id="B94CF25DFF82A370FD3D15972ABBFC28" box="[730,945,979,1005]" italics="true" pageId="3" pageNumber="83">Urocytellus parryii</emphasis>
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</taxonomicName>
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colony,
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<geoCoordinate id="EE0C4888FF82A370FBF415962DACFC29" box="[1043,1190,978,1005]" degrees="65.59373" direction="north" orientation="latitude" pageId="3" pageNumber="83" precision="1" value="65.59373">65.59373° N</geoCoordinate>
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,
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<geoCoordinate id="EE0C4888FF82A370FB5415962C5AFC29" box="[1203,1360,978,1005]" degrees="171.02521" direction="east" orientation="longitude" pageId="3" pageNumber="83" precision="1" value="171.0252">171.02521° E</geoCoordinate>
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, 8–
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<date id="FF86088FFF82A370FA9D159729FFFBD5" pageId="3" pageNumber="83" value="2013-07-30">30. 07.2013</date>
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, Olga Makarova leg
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</materialsCitation>
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.
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</paragraph>
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<paragraph id="8B872E4FFF82A370FF20125F2AB3FBB8" blockId="3.[151,1437,942,2013]" pageId="3" pageNumber="83">
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<materialsCitation id="3B502412FF82A370FF20125F2AB8FBB9" pageId="3" pageNumber="83" specimenCount="7" typeStatus="paratype">
|
||||
<emphasis id="B94CF25DFF82A370FF20125F2833FBF0" box="[199,313,1051,1076]" italics="true" pageId="3" pageNumber="83">
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||||
<typeStatus id="548390EDFF82A370FF20125F2833FBF0" box="[199,313,1051,1076]" pageId="3" pageNumber="83" type="paratype">Paratypes</typeStatus>
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</emphasis>
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: In total
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<specimenCount id="9D3EE5C6FF82A370FE41125F2B3DFBF1" box="[422,567,1051,1077]" count="7" pageId="3" pageNumber="83" type="generic">7 specimens</specimenCount>
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||||
:
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<emphasis id="B94CF25DFF82A370FDA3125E2BAAFBF0" bold="true" box="[580,672,1050,1076]" pageId="3" pageNumber="83">P.149.1.</emphasis>
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slide
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<emphasis id="B94CF25DFF82A370FD0F125F2AECFBF0" bold="true" box="[744,998,1050,1077]" pageId="3" pageNumber="83">No. 2813a+b, P.149.2</emphasis>
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slide
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<emphasis id="B94CF25DFF82A370FBCA125F2C21FBF0" bold="true" box="[1069,1323,1050,1077]" pageId="3" pageNumber="83">No. 3096a+b, P.149.3</emphasis>
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slide
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<emphasis id="B94CF25DFF82A370FA94125F2874FB9C" bold="true" pageId="3" pageNumber="83">No. 3097a+b+c, P.149.4</emphasis>
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slide
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<emphasis id="B94CF25DFF82A370FE24127B2BB5FB9C" bold="true" box="[451,703,1086,1113]" pageId="3" pageNumber="83">No. 3098a+b, P.149.5</emphasis>
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slide
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<emphasis id="B94CF25DFF82A370FCE2127B2D17FB9C" bold="true" box="[773,1053,1086,1113]" pageId="3" pageNumber="83">No. 3100a+b+c, P.149.6</emphasis>
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slide
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<emphasis id="B94CF25DFF82A370FB84127B2C55FB9C" bold="true" box="[1123,1375,1086,1113]" pageId="3" pageNumber="83">No. 3101a+b, P.149.7</emphasis>
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slide
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<emphasis id="B94CF25DFF82A370FF7012272843FBB8" bold="true" box="[151,329,1122,1149]" pageId="3" pageNumber="83">No. 3104a+b+c</emphasis>
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— adult, stained specimens, the same data as holotype
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</materialsCitation>
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.
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</paragraph>
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<paragraph id="8B872E4FFF82A370FF2012C328CAFB01" blockId="3.[151,1437,942,2013]" pageId="3" pageNumber="83">
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<emphasis id="B94CF25DFF82A370FF2012C32B13FB64" bold="true" box="[199,537,1158,1185]" pageId="3" pageNumber="83">Further material examined.</emphasis>
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No additional specimens were collected at the given site, although they were singly seen in pitfall traps.
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</paragraph>
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</subSubSection>
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<subSubSection id="C3227DC4FF82A370FF20128B2D53FB2D" box="[199,1113,1231,1257]" pageId="3" pageNumber="83" type="etymology">
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<paragraph id="8B872E4FFF82A370FF20128B2D53FB2D" blockId="3.[151,1437,942,2013]" box="[199,1113,1231,1257]" pageId="3" pageNumber="83">
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<emphasis id="B94CF25DFF82A370FF20128B2844FB2D" bold="true" box="[199,334,1231,1257]" pageId="3" pageNumber="83">Etymology.</emphasis>
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The species is named after the Chukot Peninsula where it was found.
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</paragraph>
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||||
</subSubSection>
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<subSubSection id="C3227DC4FF82A370FF2012B62D01F9B1" pageId="3" pageNumber="83" type="diagnosis">
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<paragraph id="8B872E4FFF82A370FF2012B62D01F9B1" blockId="3.[151,1437,942,2013]" pageId="3" pageNumber="83">
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<emphasis id="B94CF25DFF82A370FF2012B62848FAC8" bold="true" box="[199,322,1266,1292]" pageId="3" pageNumber="83">Diagnosis.</emphasis>
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The new species can be recognized by the following combination of characters: (1) large worms (
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<quantity id="4CC083AAFF82A370FF7813532811FAF5" box="[159,283,1303,1329]" metricMagnitude="-2" metricUnit="m" metricValue="2.6" metricValueMax="3.3" metricValueMin="1.9" pageId="3" pageNumber="83" unit="mm" value="26.0" valueMax="33.0" valueMin="19.0">19–33 mm</quantity>
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||||
long and about
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||||
<quantity id="4CC083AAFF82A370FE3113522B40FAF5" box="[470,586,1302,1329]" metricMagnitude="-3" metricUnit="m" metricValue="1.75" metricValueMax="2.0" metricValueMin="1.5" pageId="3" pageNumber="83" unit="mm" value="1.75" valueMax="2.0" valueMin="1.5">1.5–2 mm</quantity>
|
||||
at clitellum, segments 65–78), dorsal side red-brown by pigmentation; (2) chaetae sigmoid with nodulus, maximum 8–9 per bundle in the ventral bundles, in V–IX in lateral bundles only 1–3 larger and stronger chaetae; (3) clitellum girdle-shaped; (4) five preclitellar pairs of nephridia; (5) dorsal blood vessel from XV–XX; (6) two pairs of primary and 3–4 pairs of secondary pharyngeal glands, lobed, not connected dorsally; (7) sperm funnel 875–2000 µm long and 4–10 times longer than wide, sperm duct extending backwards into XIV–XIX inside the sperm sacs, diameter 35–50 µm. Atrium 300–475µm long, maximum width 100–150 µm with 8–10 large atrial glands; (8) male copulatory organ (‘penial bulb’) is a spherical structure (diameter 270–330 µm) and consisting of two series of penial glands; (9) spermatheca free, ectal duct 500–900 µm long and the distal part thicker. Ampulla possesses two or three diverticula (300–500 µm long) with sperm in them. The ampulla thin-walled, extending to X–XII, full with sperm and not connected to the intestine.
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</paragraph>
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||||
</subSubSection>
|
||||
<subSubSection id="C3227DC4FF82A375FF20103A28F7FD41" lastPageId="6" lastPageNumber="86" pageId="3" pageNumber="83" type="description">
|
||||
<paragraph id="8B872E4FFF82A377FF20103A2ADAFF11" blockId="3.[151,1437,942,2013]" lastBlockId="4.[151,1437,151,213]" lastPageId="4" lastPageNumber="84" pageId="3" pageNumber="83">
|
||||
<emphasis id="B94CF25DFF82A370FF20103A285BF95C" bold="true" box="[199,337,1662,1688]" pageId="3" pageNumber="83">Description</emphasis>
|
||||
. Large enchytraeid worm. The dorsal side brown and mottled by pigmentation (
|
||||
<figureCitation id="130332CAFF82A370FB2F103B2C2BF95D" box="[1224,1313,1663,1689]" captionStart="FIGURE 2" captionStartId="4.[152,255,1417,1441]" captionTargetBox="[188,1399,237,1393]" captionTargetId="figure-58@4.[188,1399,237,1393]" captionTargetPageId="4" captionText="FIGURE 2. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Pigmented forepart of the body, dorsal view. B. Clitellar glands, dorsal view. C. Lateral chaetae in IV. D. Larger lateral chaetae in VIII. E. Ventral chaetae in VIII. F. Ventral chaetae in LVI. G. Chloragogen cells (dorsal vessel marked with arrow). H. Parasites (Selenidiidae) in intestine. I. Nephridium. J. Dissected sperm funnel. Scale bars A–H 50 μm, I–J 200 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897304" httpUri="https://zenodo.org/record/14897304/files/figure.png" pageId="3" pageNumber="83">Fig. 2A</figureCitation>
|
||||
).
|
||||
<typeStatus id="548390EDFF82A370FAD3103B2C96F95D" box="[1332,1436,1663,1689]" pageId="3" pageNumber="83" type="holotype">Holotype</typeStatus>
|
||||
<quantity id="4CC083AAFF82A370FF7010E729F7F979" box="[151,253,1699,1725]" metricMagnitude="-2" metricUnit="m" metricValue="2.2199999999999998" pageId="3" pageNumber="83" unit="mm" value="22.2">22.2 mm</quantity>
|
||||
long,
|
||||
<quantity id="4CC083AAFF82A370FEA110E62894F979" box="[326,414,1698,1725]" metricMagnitude="-3" metricUnit="m" metricValue="1.5" pageId="3" pageNumber="83" unit="mm" value="1.5">1.5 mm</quantity>
|
||||
wide at clitellum, segment number 65. Body length of
|
||||
<typeStatus id="548390EDFF82A370FBF010E72D88F979" box="[1047,1154,1699,1725]" pageId="3" pageNumber="83" type="paratype">paratypes</typeStatus>
|
||||
<quantity id="4CC083AAFF82A370FB6C10E72C02F979" box="[1163,1288,1699,1725]" metricMagnitude="-2" metricUnit="m" metricValue="2.6" metricValueMax="3.3" metricValueMin="1.9" pageId="3" pageNumber="83" unit="mm" value="26.0" valueMax="33.0" valueMin="19.0">19–33 mm</quantity>
|
||||
, width
|
||||
<quantity id="4CC083AAFF82A370FABA10E629FAF925" metricMagnitude="-3" metricUnit="m" metricValue="1.1749999999999998" metricValueMax="1.4" metricValueMin="0.95" pageId="3" pageNumber="83" unit="mm" value="1.1749999999999998" valueMax="1.4" valueMin="0.95">0.95– 1.4 mm</quantity>
|
||||
at VIII and 1.4–2.0 mm at clitellum. Segments 66–78. Chaetae sigmoid with nodulus. Chaetal formula: 1,(0),2,3,4–4,5,6,(3,2): (4,5),6–9–5–8,(4,3). Chaetae unequal in size within a bundle, increasing gradually in length towards the lateral midline; size difference most pronounced in ventral and also lateral bundles of segments behind the clitellum. In II–IV mostly 3–4 chaetae per bundle laterally (about 75–100×8–10 µm) (
|
||||
<figureCitation id="130332CAFF82A370FB9B11772DD9F889" box="[1148,1235,1843,1869]" captionStart="FIGURE 2" captionStartId="4.[152,255,1417,1441]" captionTargetBox="[188,1399,237,1393]" captionTargetId="figure-58@4.[188,1399,237,1393]" captionTargetPageId="4" captionText="FIGURE 2. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Pigmented forepart of the body, dorsal view. B. Clitellar glands, dorsal view. C. Lateral chaetae in IV. D. Larger lateral chaetae in VIII. E. Ventral chaetae in VIII. F. Ventral chaetae in LVI. G. Chloragogen cells (dorsal vessel marked with arrow). H. Parasites (Selenidiidae) in intestine. I. Nephridium. J. Dissected sperm funnel. Scale bars A–H 50 μm, I–J 200 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897304" httpUri="https://zenodo.org/record/14897304/files/figure.png" pageId="3" pageNumber="83">Fig. 2C</figureCitation>
|
||||
), in V–IX chaetae fewer in number (1–3) and enlarged (140–205×13–15 µm) (
|
||||
<figureCitation id="130332CAFF82A370FCAD11132AAFF8B5" box="[842,933,1879,1905]" captionStart="FIGURE 2" captionStartId="4.[152,255,1417,1441]" captionTargetBox="[188,1399,237,1393]" captionTargetId="figure-58@4.[188,1399,237,1393]" captionTargetPageId="4" captionText="FIGURE 2. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Pigmented forepart of the body, dorsal view. B. Clitellar glands, dorsal view. C. Lateral chaetae in IV. D. Larger lateral chaetae in VIII. E. Ventral chaetae in VIII. F. Ventral chaetae in LVI. G. Chloragogen cells (dorsal vessel marked with arrow). H. Parasites (Selenidiidae) in intestine. I. Nephridium. J. Dissected sperm funnel. Scale bars A–H 50 μm, I–J 200 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897304" httpUri="https://zenodo.org/record/14897304/files/figure.png" pageId="3" pageNumber="83">Fig. 2D</figureCitation>
|
||||
), in X–XI the length of the chaetae slightly smaller (100–170×9–12 µm). In the ventral bundles 6–9 chaetae (80–200×9–15 µm) (
|
||||
<figureCitation id="130332CAFF82A370FBAC113F2DABF851" box="[1099,1185,1915,1941]" captionStart="FIGURE 2" captionStartId="4.[152,255,1417,1441]" captionTargetBox="[188,1399,237,1393]" captionTargetId="figure-58@4.[188,1399,237,1393]" captionTargetPageId="4" captionText="FIGURE 2. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Pigmented forepart of the body, dorsal view. B. Clitellar glands, dorsal view. C. Lateral chaetae in IV. D. Larger lateral chaetae in VIII. E. Ventral chaetae in VIII. F. Ventral chaetae in LVI. G. Chloragogen cells (dorsal vessel marked with arrow). H. Parasites (Selenidiidae) in intestine. I. Nephridium. J. Dissected sperm funnel. Scale bars A–H 50 μm, I–J 200 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897304" httpUri="https://zenodo.org/record/14897304/files/figure.png" pageId="3" pageNumber="83">Fig. 2E</figureCitation>
|
||||
). Behind the clitellum, chaetae slightly smaller and thinner (105–120×10 µm). In caudal segments, the longest chaetae measuring 125–140 x10 µm (
|
||||
<figureCitation id="130332CAFF82A370FF1A11872858F819" box="[253,338,1987,2013]" captionStart="FIGURE 2" captionStartId="4.[152,255,1417,1441]" captionTargetBox="[188,1399,237,1393]" captionTargetId="figure-58@4.[188,1399,237,1393]" captionTargetPageId="4" captionText="FIGURE 2. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Pigmented forepart of the body, dorsal view. B. Clitellar glands, dorsal view. C. Lateral chaetae in IV. D. Larger lateral chaetae in VIII. E. Ventral chaetae in VIII. F. Ventral chaetae in LVI. G. Chloragogen cells (dorsal vessel marked with arrow). H. Parasites (Selenidiidae) in intestine. I. Nephridium. J. Dissected sperm funnel. Scale bars A–H 50 μm, I–J 200 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897304" httpUri="https://zenodo.org/record/14897304/files/figure.png" pageId="3" pageNumber="83">Fig. 2F</figureCitation>
|
||||
). Chaetae in XII absent. Head pore a large triangular pit at one-third the distance from the anterior tip of head to 0/1. Clitellum girdle–shaped in 1/2XI–XIII, gland cells small, in reticulate pattern (
|
||||
<figureCitation id="130332CAFF85A377FB2916D32C2FFF75" box="[1230,1317,151,177]" captionStart="FIGURE 2" captionStartId="4.[152,255,1417,1441]" captionTargetBox="[188,1399,237,1393]" captionTargetId="figure-58@4.[188,1399,237,1393]" captionTargetPageId="4" captionText="FIGURE 2. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Pigmented forepart of the body, dorsal view. B. Clitellar glands, dorsal view. C. Lateral chaetae in IV. D. Larger lateral chaetae in VIII. E. Ventral chaetae in VIII. F. Ventral chaetae in LVI. G. Chloragogen cells (dorsal vessel marked with arrow). H. Parasites (Selenidiidae) in intestine. I. Nephridium. J. Dissected sperm funnel. Scale bars A–H 50 μm, I–J 200 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897304" httpUri="https://zenodo.org/record/14897304/files/figure.png" pageId="4" pageNumber="84">Fig. 2B</figureCitation>
|
||||
), ventrally also (
|
||||
<figureCitation id="130332CAFF85A377FF3316FF2824FF11" box="[212,302,187,213]" captionStart="FIGURE 3" captionStartId="5.[152,255,1720,1744]" captionTargetBox="[198,1390,181,1696]" captionTargetId="figure-35@5.[198,1390,181,1696]" captionTargetPageId="5" captionText="FIGURE 3. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Sperm duct (the cilia well visible). B–C. Male copulatory organs (a=atrium, atrial glands marked with white arrows and penial glands, marked with black arrows). D. Clitellar glands (bursal slits, marked with arrows) ventral view from outside. E. Sperm bundle. F. Ectal part of a spermatheca with two diverticula (ectal duct marked with white arrow, diverticula marked with black arrows). G. Prepared spermatheca of holotype (ectal duct marked with white arrow, diverticula marked with black arrows, a=ampulla). H. Spermathecal ectal part of holotype with three diverticula (marking is the same as in G). I. Distal part of spermathecal ectal duct (thicker part marked with white arrow. the canal marked with black arrow). J. Proximal part of spermathecal ectal duct only (canal marked with arrow, far wider than in distal part). K. Spermathecae in V–XI. L. Sperm in ampulla. C, G–J from holotype. Scale bars A–F, H–J, L 50 μm, G 200 μm, K 500 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897308" httpUri="https://zenodo.org/record/14897308/files/figure.png" pageId="4" pageNumber="84">Fig. 3D</figureCitation>
|
||||
). Thickness of body wall about 30–50 µm, cuticlea 2–5 µm.
|
||||
</paragraph>
|
||||
<caption id="DF477EC7FF85A377FF7F13CD284FF9F6" ID-DOI="http://doi.org/10.5281/zenodo.14897304" ID-Zenodo-Dep="14897304" httpUri="https://zenodo.org/record/14897304/files/figure.png" pageId="4" pageNumber="84" startId="4.[152,255,1417,1441]" targetBox="[188,1399,237,1393]" targetPageId="4" targetType="figure">
|
||||
<paragraph id="8B872E4FFF85A377FF7F13CD284FF9F6" blockId="4.[151,1436,1417,1586]" pageId="4" pageNumber="84">
|
||||
<emphasis id="B94CF25DFF85A377FF7F13CD2818FA65" bold="true" box="[152,274,1417,1441]" pageId="4" pageNumber="84">FIGURE 2</emphasis>
|
||||
. Micrograph of
|
||||
<taxonomicName id="4C3855CCFF85A377FE5013CE2BE3FA66" authorityName="Dózsa-Farkas & Makarova" authorityYear="2025" box="[439,745,1418,1442]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="4" pageNumber="84" phylum="Annelida" rank="species" species="tschukotensis" status="sp. nov.">
|
||||
<emphasis id="B94CF25DFF85A377FE5013CE2BE3FA66" box="[439,745,1418,1442]" italics="true" pageId="4" pageNumber="84">Mesenchytraeus tschukotensis</emphasis>
|
||||
</taxonomicName>
|
||||
<emphasis id="B94CF25DFF85A377FD0813CE2A55FA65" bold="true" box="[751,863,1417,1442]" pageId="4" pageNumber="84">
|
||||
<taxonomicNameLabel id="A27F4F26FF85A377FD0813CE2A4AFA66" box="[751,832,1418,1442]" pageId="4" pageNumber="84" rank="species">sp. nov.</taxonomicNameLabel>
|
||||
A.
|
||||
</emphasis>
|
||||
Pigmented forepart of the body, dorsal view.
|
||||
<emphasis id="B94CF25DFF85A377FACB13CE2C49FA66" bold="true" box="[1324,1347,1418,1442]" pageId="4" pageNumber="84">B.</emphasis>
|
||||
Clitellar glands, dorsal view.
|
||||
<emphasis id="B94CF25DFF85A377FE8C13E9288EFA01" bold="true" box="[363,388,1453,1477]" pageId="4" pageNumber="84">C.</emphasis>
|
||||
Lateral chaetae in IV.
|
||||
<emphasis id="B94CF25DFF85A377FD9713EA2B83FA02" bold="true" box="[624,649,1454,1478]" pageId="4" pageNumber="84">D.</emphasis>
|
||||
Larger lateral chaetae in VIII.
|
||||
<emphasis id="B94CF25DFF85A377FC2B13EA2AE9FA02" bold="true" box="[972,995,1454,1478]" pageId="4" pageNumber="84">E.</emphasis>
|
||||
Ventral chaetae in VIII.
|
||||
<emphasis id="B94CF25DFF85A377FB0313EA2DFDFA02" bold="true" box="[1252,1271,1454,1478]" pageId="4" pageNumber="84">F.</emphasis>
|
||||
Ventral chaetae in LVI.
|
||||
<emphasis id="B94CF25DFF85A377FF0C1395280FFA2E" bold="true" box="[235,261,1489,1514]" pageId="4" pageNumber="84">G.</emphasis>
|
||||
Chloragogen cells (dorsal vessel marked with arrow).
|
||||
<emphasis id="B94CF25DFF85A377FCA013962A6BFA2E" bold="true" box="[839,865,1490,1514]" pageId="4" pageNumber="84">H.</emphasis>
|
||||
Parasites (
|
||||
<taxonomicName id="4C3855CCFF85A377FC3313962D5EFA2E" authorityName="Brasil" authorityYear="1907" box="[980,1108,1490,1514]" family="Selenidiidae" kingdom="Chromista" order="Eugregarinida" pageId="4" pageNumber="84" phylum="Miozoa" rank="family">Selenidiidae</taxonomicName>
|
||||
) in intestine.
|
||||
<emphasis id="B94CF25DFF85A377FB0113962DFCFA2E" bold="true" box="[1254,1270,1490,1514]" pageId="4" pageNumber="84">I.</emphasis>
|
||||
Nephridium.
|
||||
<emphasis id="B94CF25DFF85A377FA6E13962C96FA2E" bold="true" box="[1417,1436,1490,1514]" pageId="4" pageNumber="84">J.</emphasis>
|
||||
Dissected sperm funnel. Scale bars A–H 50 μm, I–J 200 μm. The micrographs were taken from the opened worms or the dissected organs.
|
||||
</paragraph>
|
||||
</caption>
|
||||
<paragraph id="8B872E4FFF85A375FF2010C028F7FD41" blockId="4.[151,1437,1668,2018]" lastBlockId="6.[151,1437,150,2013]" lastPageId="6" lastPageNumber="86" pageId="4" pageNumber="84">
|
||||
Brain incised anteriorly and truncated posteriorly, as long as wide or slightly wider than long (length about 150– 160 µm). Two pairs of primary pharyngeal glands (in 4/5–5/6), not united dorsally, and three or four pairs of secondary pharyngeal glands in V–VII or VIII; the glands lobed. Chloragocytes from IV, about 10–13 µm long. Parasites (probably
|
||||
<taxonomicName id="4C3855CCFF85A377FF7010B42829F8CE" authorityName="Brasil" authorityYear="1907" box="[151,291,1776,1802]" family="Selenidiidae" kingdom="Chromista" order="Eugregarinida" pageId="4" pageNumber="84" phylum="Miozoa" rank="family">Selenidiidae</taxonomicName>
|
||||
?) are often found in the intestine (
|
||||
<figureCitation id="130332CAFF85A377FD4F10B42BF5F8CE" box="[680,767,1776,1802]" captionStart="FIGURE 2" captionStartId="4.[152,255,1417,1441]" captionTargetBox="[188,1399,237,1393]" captionTargetId="figure-58@4.[188,1399,237,1393]" captionTargetPageId="4" captionText="FIGURE 2. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Pigmented forepart of the body, dorsal view. B. Clitellar glands, dorsal view. C. Lateral chaetae in IV. D. Larger lateral chaetae in VIII. E. Ventral chaetae in VIII. F. Ventral chaetae in LVI. G. Chloragogen cells (dorsal vessel marked with arrow). H. Parasites (Selenidiidae) in intestine. I. Nephridium. J. Dissected sperm funnel. Scale bars A–H 50 μm, I–J 200 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897304" httpUri="https://zenodo.org/record/14897304/files/figure.png" pageId="4" pageNumber="84">Fig. 2H</figureCitation>
|
||||
). Dorsal blood vessel from XV–XX, anterior bifurcation in I. Five pairs of preclitellar nephridia from 6/7 to 10/11, anteseptale funnel only, postseptale lobed with folded canal, no interstitial tissue, efferent duct arising between the lobes (
|
||||
<figureCitation id="130332CAFF85A377FCAE117C2A96F896" box="[841,924,1848,1874]" captionStart="FIGURE 2" captionStartId="4.[152,255,1417,1441]" captionTargetBox="[188,1399,237,1393]" captionTargetId="figure-58@4.[188,1399,237,1393]" captionTargetPageId="4" captionText="FIGURE 2. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Pigmented forepart of the body, dorsal view. B. Clitellar glands, dorsal view. C. Lateral chaetae in IV. D. Larger lateral chaetae in VIII. E. Ventral chaetae in VIII. F. Ventral chaetae in LVI. G. Chloragogen cells (dorsal vessel marked with arrow). H. Parasites (Selenidiidae) in intestine. I. Nephridium. J. Dissected sperm funnel. Scale bars A–H 50 μm, I–J 200 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897304" httpUri="https://zenodo.org/record/14897304/files/figure.png" pageId="4" pageNumber="84">Fig. 2I</figureCitation>
|
||||
). Oesophageal and intestinal appendages or diverticula absent. Coelomocytes small, roundish, with well-staining nucleus, about 10 µm. Sperm sac extending backwards to XXIV–XX, egg sac to XIX–XXIV. Sperm bundles 125–250 µm long, the heads clumped only at one end and 35–45 µm long (
|
||||
<figureCitation id="130332CAFF85A377FE0611E02B32F87A" box="[481,568,1956,1982]" captionStart="FIGURE 3" captionStartId="5.[152,255,1720,1744]" captionTargetBox="[198,1390,181,1696]" captionTargetId="figure-35@5.[198,1390,181,1696]" captionTargetPageId="5" captionText="FIGURE 3. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Sperm duct (the cilia well visible). B–C. Male copulatory organs (a=atrium, atrial glands marked with white arrows and penial glands, marked with black arrows). D. Clitellar glands (bursal slits, marked with arrows) ventral view from outside. E. Sperm bundle. F. Ectal part of a spermatheca with two diverticula (ectal duct marked with white arrow, diverticula marked with black arrows). G. Prepared spermatheca of holotype (ectal duct marked with white arrow, diverticula marked with black arrows, a=ampulla). H. Spermathecal ectal part of holotype with three diverticula (marking is the same as in G). I. Distal part of spermathecal ectal duct (thicker part marked with white arrow. the canal marked with black arrow). J. Proximal part of spermathecal ectal duct only (canal marked with arrow, far wider than in distal part). K. Spermathecae in V–XI. L. Sperm in ampulla. C, G–J from holotype. Scale bars A–F, H–J, L 50 μm, G 200 μm, K 500 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897308" httpUri="https://zenodo.org/record/14897308/files/figure.png" pageId="4" pageNumber="84">Fig. 3E</figureCitation>
|
||||
). Sperm funnel long (
|
||||
<figureCitation id="130332CAFF85A377FCCA11E02A74F87A" box="[813,894,1956,1982]" captionStart="FIGURE 2" captionStartId="4.[152,255,1417,1441]" captionTargetBox="[188,1399,237,1393]" captionTargetId="figure-58@4.[188,1399,237,1393]" captionTargetPageId="4" captionText="FIGURE 2. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Pigmented forepart of the body, dorsal view. B. Clitellar glands, dorsal view. C. Lateral chaetae in IV. D. Larger lateral chaetae in VIII. E. Ventral chaetae in VIII. F. Ventral chaetae in LVI. G. Chloragogen cells (dorsal vessel marked with arrow). H. Parasites (Selenidiidae) in intestine. I. Nephridium. J. Dissected sperm funnel. Scale bars A–H 50 μm, I–J 200 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897304" httpUri="https://zenodo.org/record/14897304/files/figure.png" pageId="4" pageNumber="84">Fig. 2J</figureCitation>
|
||||
), 875–2000 µm in length and 4–10 times longer than wide. Sperm duct long, ciliated (
|
||||
<figureCitation id="130332CAFF85A377FDAA118C2BA0F826" box="[589,682,1992,2018]" captionStart="FIGURE 3" captionStartId="5.[152,255,1720,1744]" captionTargetBox="[198,1390,181,1696]" captionTargetId="figure-35@5.[198,1390,181,1696]" captionTargetPageId="5" captionText="FIGURE 3. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Sperm duct (the cilia well visible). B–C. Male copulatory organs (a=atrium, atrial glands marked with white arrows and penial glands, marked with black arrows). D. Clitellar glands (bursal slits, marked with arrows) ventral view from outside. E. Sperm bundle. F. Ectal part of a spermatheca with two diverticula (ectal duct marked with white arrow, diverticula marked with black arrows). G. Prepared spermatheca of holotype (ectal duct marked with white arrow, diverticula marked with black arrows, a=ampulla). H. Spermathecal ectal part of holotype with three diverticula (marking is the same as in G). I. Distal part of spermathecal ectal duct (thicker part marked with white arrow. the canal marked with black arrow). J. Proximal part of spermathecal ectal duct only (canal marked with arrow, far wider than in distal part). K. Spermathecae in V–XI. L. Sperm in ampulla. C, G–J from holotype. Scale bars A–F, H–J, L 50 μm, G 200 μm, K 500 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897308" httpUri="https://zenodo.org/record/14897308/files/figure.png" pageId="4" pageNumber="84">Fig. 3A</figureCitation>
|
||||
), loosely coiled, extending backwards into XIV–XIX inside the sperm sac, diameter 35–50 µm. Atrium (
|
||||
<figureCitation id="130332CAFF87A375FDBA16D32BD2FF75" box="[605,728,151,177]" captionStart="FIGURE 3" captionStartId="5.[152,255,1720,1744]" captionTargetBox="[198,1390,181,1696]" captionTargetId="figure-35@5.[198,1390,181,1696]" captionTargetPageId="5" captionText="FIGURE 3. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Sperm duct (the cilia well visible). B–C. Male copulatory organs (a=atrium, atrial glands marked with white arrows and penial glands, marked with black arrows). D. Clitellar glands (bursal slits, marked with arrows) ventral view from outside. E. Sperm bundle. F. Ectal part of a spermatheca with two diverticula (ectal duct marked with white arrow, diverticula marked with black arrows). G. Prepared spermatheca of holotype (ectal duct marked with white arrow, diverticula marked with black arrows, a=ampulla). H. Spermathecal ectal part of holotype with three diverticula (marking is the same as in G). I. Distal part of spermathecal ectal duct (thicker part marked with white arrow. the canal marked with black arrow). J. Proximal part of spermathecal ectal duct only (canal marked with arrow, far wider than in distal part). K. Spermathecae in V–XI. L. Sperm in ampulla. C, G–J from holotype. Scale bars A–F, H–J, L 50 μm, G 200 μm, K 500 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897308" httpUri="https://zenodo.org/record/14897308/files/figure.png" pageId="6" pageNumber="86">Figs 3B, C</figureCitation>
|
||||
) 300–475 µm long, maximum width 100–150 µm, here, where the atrium is widest around the middle, joined by 8–10 large atrial glands (prostate glands), usually 200–300 µm long (
|
||||
<figureCitation id="130332CAFF87A375FF3E169B2852FF3D" box="[217,344,223,249]" captionStart="FIGURE 3" captionStartId="5.[152,255,1720,1744]" captionTargetBox="[198,1390,181,1696]" captionTargetId="figure-35@5.[198,1390,181,1696]" captionTargetPageId="5" captionText="FIGURE 3. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Sperm duct (the cilia well visible). B–C. Male copulatory organs (a=atrium, atrial glands marked with white arrows and penial glands, marked with black arrows). D. Clitellar glands (bursal slits, marked with arrows) ventral view from outside. E. Sperm bundle. F. Ectal part of a spermatheca with two diverticula (ectal duct marked with white arrow, diverticula marked with black arrows). G. Prepared spermatheca of holotype (ectal duct marked with white arrow, diverticula marked with black arrows, a=ampulla). H. Spermathecal ectal part of holotype with three diverticula (marking is the same as in G). I. Distal part of spermathecal ectal duct (thicker part marked with white arrow. the canal marked with black arrow). J. Proximal part of spermathecal ectal duct only (canal marked with arrow, far wider than in distal part). K. Spermathecae in V–XI. L. Sperm in ampulla. C, G–J from holotype. Scale bars A–F, H–J, L 50 μm, G 200 μm, K 500 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897308" httpUri="https://zenodo.org/record/14897308/files/figure.png" pageId="6" pageNumber="86">Figs 3B, C</figureCitation>
|
||||
). The atrium connects through a short ectal duct (60–100 µm long) to the male copulatory organ (‘penial bulb’) which is a spherical structure (diameter 270–330 µm) and consists of two series of closely packed individual penial glands (
|
||||
<figureCitation id="130332CAFF87A375FE5617632B26FE85" box="[433,556,295,321]" captionStart="FIGURE 3" captionStartId="5.[152,255,1720,1744]" captionTargetBox="[198,1390,181,1696]" captionTargetId="figure-35@5.[198,1390,181,1696]" captionTargetPageId="5" captionText="FIGURE 3. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Sperm duct (the cilia well visible). B–C. Male copulatory organs (a=atrium, atrial glands marked with white arrows and penial glands, marked with black arrows). D. Clitellar glands (bursal slits, marked with arrows) ventral view from outside. E. Sperm bundle. F. Ectal part of a spermatheca with two diverticula (ectal duct marked with white arrow, diverticula marked with black arrows). G. Prepared spermatheca of holotype (ectal duct marked with white arrow, diverticula marked with black arrows, a=ampulla). H. Spermathecal ectal part of holotype with three diverticula (marking is the same as in G). I. Distal part of spermathecal ectal duct (thicker part marked with white arrow. the canal marked with black arrow). J. Proximal part of spermathecal ectal duct only (canal marked with arrow, far wider than in distal part). K. Spermathecae in V–XI. L. Sperm in ampulla. C, G–J from holotype. Scale bars A–F, H–J, L 50 μm, G 200 μm, K 500 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897308" httpUri="https://zenodo.org/record/14897308/files/figure.png" pageId="6" pageNumber="86">Figs 3B, C</figureCitation>
|
||||
). Accessory copulatory glands and subneural glands absent. Spermatheca (
|
||||
<figureCitation id="130332CAFF87A375FA8D176329DEFEA1" captionStart="FIGURE 3" captionStartId="5.[152,255,1720,1744]" captionTargetBox="[198,1390,181,1696]" captionTargetId="figure-35@5.[198,1390,181,1696]" captionTargetPageId="5" captionText="FIGURE 3. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Sperm duct (the cilia well visible). B–C. Male copulatory organs (a=atrium, atrial glands marked with white arrows and penial glands, marked with black arrows). D. Clitellar glands (bursal slits, marked with arrows) ventral view from outside. E. Sperm bundle. F. Ectal part of a spermatheca with two diverticula (ectal duct marked with white arrow, diverticula marked with black arrows). G. Prepared spermatheca of holotype (ectal duct marked with white arrow, diverticula marked with black arrows, a=ampulla). H. Spermathecal ectal part of holotype with three diverticula (marking is the same as in G). I. Distal part of spermathecal ectal duct (thicker part marked with white arrow. the canal marked with black arrow). J. Proximal part of spermathecal ectal duct only (canal marked with arrow, far wider than in distal part). K. Spermathecae in V–XI. L. Sperm in ampulla. C, G–J from holotype. Scale bars A–F, H–J, L 50 μm, G 200 μm, K 500 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897308" httpUri="https://zenodo.org/record/14897308/files/figure.png" pageId="6" pageNumber="86">Figs 3F–L</figureCitation>
|
||||
) free, the ectal duct 500–900 µm long. The distal part of duct 140–200 µm long and 75–100 µm wide, later only 60–80 µm wide and slightly tapering, at the entrance to the ampulla 45–65 µm wide only. On the contrary, the width of canal of ectal duct widens from 8 µm to 12 µm from the distal end in the direction of the ampulla (
|
||||
<figureCitation id="130332CAFF87A375FA8D17D729C3FE15" captionStart="FIGURE 3" captionStartId="5.[152,255,1720,1744]" captionTargetBox="[198,1390,181,1696]" captionTargetId="figure-35@5.[198,1390,181,1696]" captionTargetPageId="5" captionText="FIGURE 3. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Sperm duct (the cilia well visible). B–C. Male copulatory organs (a=atrium, atrial glands marked with white arrows and penial glands, marked with black arrows). D. Clitellar glands (bursal slits, marked with arrows) ventral view from outside. E. Sperm bundle. F. Ectal part of a spermatheca with two diverticula (ectal duct marked with white arrow, diverticula marked with black arrows). G. Prepared spermatheca of holotype (ectal duct marked with white arrow, diverticula marked with black arrows, a=ampulla). H. Spermathecal ectal part of holotype with three diverticula (marking is the same as in G). I. Distal part of spermathecal ectal duct (thicker part marked with white arrow. the canal marked with black arrow). J. Proximal part of spermathecal ectal duct only (canal marked with arrow, far wider than in distal part). K. Spermathecae in V–XI. L. Sperm in ampulla. C, G–J from holotype. Scale bars A–F, H–J, L 50 μm, G 200 μm, K 500 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897308" httpUri="https://zenodo.org/record/14897308/files/figure.png" pageId="6" pageNumber="86">Figs 3I, J</figureCitation>
|
||||
). Ampulla with two or three diverticula (300–500 µm long and 80–110 µm wide) with sperm in them and each have separate insertions (
|
||||
<figureCitation id="130332CAFF87A375FE51179F2B3AFE31" box="[438,560,475,501]" captionStart="FIGURE 3" captionStartId="5.[152,255,1720,1744]" captionTargetBox="[198,1390,181,1696]" captionTargetId="figure-35@5.[198,1390,181,1696]" captionTargetPageId="5" captionText="FIGURE 3. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Sperm duct (the cilia well visible). B–C. Male copulatory organs (a=atrium, atrial glands marked with white arrows and penial glands, marked with black arrows). D. Clitellar glands (bursal slits, marked with arrows) ventral view from outside. E. Sperm bundle. F. Ectal part of a spermatheca with two diverticula (ectal duct marked with white arrow, diverticula marked with black arrows). G. Prepared spermatheca of holotype (ectal duct marked with white arrow, diverticula marked with black arrows, a=ampulla). H. Spermathecal ectal part of holotype with three diverticula (marking is the same as in G). I. Distal part of spermathecal ectal duct (thicker part marked with white arrow. the canal marked with black arrow). J. Proximal part of spermathecal ectal duct only (canal marked with arrow, far wider than in distal part). K. Spermathecae in V–XI. L. Sperm in ampulla. C, G–J from holotype. Scale bars A–F, H–J, L 50 μm, G 200 μm, K 500 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897308" httpUri="https://zenodo.org/record/14897308/files/figure.png" pageId="6" pageNumber="86">Figs 3F–H</figureCitation>
|
||||
). The ampulla thin-walled, extending to X–XII (
|
||||
<figureCitation id="130332CAFF87A375FBBA179F2DEBFE31" box="[1117,1249,475,501]" captionStart="FIGURE 3" captionStartId="5.[152,255,1720,1744]" captionTargetBox="[198,1390,181,1696]" captionTargetId="figure-35@5.[198,1390,181,1696]" captionTargetPageId="5" captionText="FIGURE 3. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Sperm duct (the cilia well visible). B–C. Male copulatory organs (a=atrium, atrial glands marked with white arrows and penial glands, marked with black arrows). D. Clitellar glands (bursal slits, marked with arrows) ventral view from outside. E. Sperm bundle. F. Ectal part of a spermatheca with two diverticula (ectal duct marked with white arrow, diverticula marked with black arrows). G. Prepared spermatheca of holotype (ectal duct marked with white arrow, diverticula marked with black arrows, a=ampulla). H. Spermathecal ectal part of holotype with three diverticula (marking is the same as in G). I. Distal part of spermathecal ectal duct (thicker part marked with white arrow. the canal marked with black arrow). J. Proximal part of spermathecal ectal duct only (canal marked with arrow, far wider than in distal part). K. Spermathecae in V–XI. L. Sperm in ampulla. C, G–J from holotype. Scale bars A–F, H–J, L 50 μm, G 200 μm, K 500 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897308" httpUri="https://zenodo.org/record/14897308/files/figure.png" pageId="6" pageNumber="86">Figs 3G, K</figureCitation>
|
||||
). In each somite there is a bulging out of ampulla, each such sac-like part being separated from the one in the adjoining segment by the constriction caused by septum (the widest sac about 400–900 µm wide). No connection with intestine. In
|
||||
<specimenCount id="9D3EE5C6FF87A375FA951467280FFDA5" count="2" pageId="6" pageNumber="86" type="generic" typeStatus="paratype">two paratypes</specimenCount>
|
||||
, they cross each other before they extend backwards. The ampulla also full with sperm (
|
||||
<figureCitation id="130332CAFF87A375FB0614032C3EFDA5" box="[1249,1332,583,609]" captionStart="FIGURE 3" captionStartId="5.[152,255,1720,1744]" captionTargetBox="[198,1390,181,1696]" captionTargetId="figure-35@5.[198,1390,181,1696]" captionTargetPageId="5" captionText="FIGURE 3. Micrograph of Mesenchytraeus tschukotensis sp. nov. A. Sperm duct (the cilia well visible). B–C. Male copulatory organs (a=atrium, atrial glands marked with white arrows and penial glands, marked with black arrows). D. Clitellar glands (bursal slits, marked with arrows) ventral view from outside. E. Sperm bundle. F. Ectal part of a spermatheca with two diverticula (ectal duct marked with white arrow, diverticula marked with black arrows). G. Prepared spermatheca of holotype (ectal duct marked with white arrow, diverticula marked with black arrows, a=ampulla). H. Spermathecal ectal part of holotype with three diverticula (marking is the same as in G). I. Distal part of spermathecal ectal duct (thicker part marked with white arrow. the canal marked with black arrow). J. Proximal part of spermathecal ectal duct only (canal marked with arrow, far wider than in distal part). K. Spermathecae in V–XI. L. Sperm in ampulla. C, G–J from holotype. Scale bars A–F, H–J, L 50 μm, G 200 μm, K 500 μm. The micrographs were taken from the opened worms or the dissected organs." figureDoi="http://doi.org/10.5281/zenodo.14897308" httpUri="https://zenodo.org/record/14897308/files/figure.png" pageId="6" pageNumber="86">Fig. 3L</figureCitation>
|
||||
). Mature egg was not seen in the egg sac.
|
||||
</paragraph>
|
||||
</subSubSection>
|
||||
<caption id="DF477EC7FF84A376FF7F10FC2D1DF835" ID-DOI="http://doi.org/10.5281/zenodo.14897308" ID-Zenodo-Dep="14897308" httpUri="https://zenodo.org/record/14897308/files/figure.png" pageId="5" pageNumber="85" startId="5.[152,255,1720,1744]" targetBox="[198,1390,181,1696]" targetPageId="5" targetType="figure">
|
||||
<paragraph id="8B872E4FFF84A376FF7F10FC2D1DF835" blockId="5.[151,1437,1720,2033]" pageId="5" pageNumber="85">
|
||||
<emphasis id="B94CF25DFF84A376FF7F10FC281DF914" bold="true" box="[152,279,1720,1744]" pageId="5" pageNumber="85">FIGURE 3.</emphasis>
|
||||
Micrograph of
|
||||
<taxonomicName id="4C3855CCFF84A376FE5310FC2BEFF914" authorityName="Dózsa-Farkas & Makarova" authorityYear="2025" box="[436,741,1720,1744]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="5" pageNumber="85" phylum="Annelida" rank="species" species="tschukotensis" status="sp. nov.">
|
||||
<emphasis id="B94CF25DFF84A376FE5310FC2BEFF914" box="[436,741,1720,1744]" italics="true" pageId="5" pageNumber="85">Mesenchytraeus tschukotensis</emphasis>
|
||||
</taxonomicName>
|
||||
<emphasis id="B94CF25DFF84A376FD0D10FC2A52F914" bold="true" box="[746,856,1720,1744]" pageId="5" pageNumber="85">
|
||||
<taxonomicNameLabel id="A27F4F26FF84A376FD0D10FC2A33F914" box="[746,825,1720,1744]" pageId="5" pageNumber="85" rank="species">sp. nov.</taxonomicNameLabel>
|
||||
A.
|
||||
</emphasis>
|
||||
Sperm duct (the cilia well visible).
|
||||
<emphasis id="B94CF25DFF84A376FB5C10FC2DF8F914" bold="true" box="[1211,1266,1720,1744]" pageId="5" pageNumber="85">B–C.</emphasis>
|
||||
Male copulatory organs (a=atrium, atrial glands marked with white arrows and penial glands, marked with black arrows).
|
||||
<emphasis id="B94CF25DFF84A376FB3910982DFCF930" bold="true" box="[1246,1270,1756,1780]" pageId="5" pageNumber="85">D.</emphasis>
|
||||
Clitellar glands (bursal slits, marked with arrows) ventral view from outside.
|
||||
<emphasis id="B94CF25DFF84A376FD1111442A07F8DC" bold="true" box="[758,781,1792,1816]" pageId="5" pageNumber="85">E.</emphasis>
|
||||
Sperm bundle.
|
||||
<emphasis id="B94CF25DFF84A376FC4E11442AB6F8DC" bold="true" box="[937,956,1792,1816]" pageId="5" pageNumber="85">F.</emphasis>
|
||||
Ectal part of a spermatheca with two diverticula (ectal duct marked with white arrow, diverticula marked with black arrows).
|
||||
<emphasis id="B94CF25DFF84A376FC4B11602ACCF8F8" bold="true" box="[940,966,1828,1852]" pageId="5" pageNumber="85">G.</emphasis>
|
||||
Prepared spermatheca of holotype (ectal duct marked with white arrow, diverticula marked with black arrows, a=ampulla).
|
||||
<emphasis id="B94CF25DFF84A376FC4F110C2AC8F8A4" bold="true" box="[936,962,1864,1888]" pageId="5" pageNumber="85">H.</emphasis>
|
||||
Spermathecal ectal part of holotype with three diverticula (marking is the same as in G).
|
||||
<emphasis id="B94CF25DFF84A376FDAD11282B50F840" bold="true" box="[586,602,1900,1924]" pageId="5" pageNumber="85">I.</emphasis>
|
||||
Distal part of spermathecal ectal duct (thicker part marked with white arrow. the canal marked with black arrow).
|
||||
<emphasis id="B94CF25DFF84A376FE0D11D428F7F86C" bold="true" box="[490,509,1936,1960]" pageId="5" pageNumber="85">J.</emphasis>
|
||||
Proximal part of spermathecal ectal duct only (canal marked with arrow, far wider than in distal part).
|
||||
<emphasis id="B94CF25DFF84A376FEF611F02826F808" bold="true" box="[273,300,1972,1996]" pageId="5" pageNumber="85">K.</emphasis>
|
||||
Spermathecae in V–XI.
|
||||
<emphasis id="B94CF25DFF84A376FDC011F02B34F808" bold="true" box="[551,574,1972,1996]" pageId="5" pageNumber="85">L.</emphasis>
|
||||
Sperm in ampulla. C, G–J from holotype. Scale bars A–F, H–J, L 50 μm, G 200 μm, K 500 μm. The micrographs were taken from the opened worms or the dissected organs.
|
||||
</paragraph>
|
||||
</caption>
|
||||
<subSubSection id="C3227DC4FF87A374FF2014CA2D4CFE85" lastPageId="7" lastPageNumber="87" pageId="6" pageNumber="86" type="diagnosis">
|
||||
<paragraph id="8B872E4FFF87A374FF2014CA2D4CFE85" blockId="6.[151,1437,150,2013]" lastBlockId="7.[151,1437,150,393]" lastPageId="7" lastPageNumber="87" pageId="6" pageNumber="86">
|
||||
<emphasis id="B94CF25DFF87A375FF2014CA28C5FD6C" bold="true" box="[199,463,654,680]" pageId="6" pageNumber="86">Differential diagnosis.</emphasis>
|
||||
Among the previously described species of
|
||||
<emphasis id="B94CF25DFF87A375FC2214CB2D88FD6D" box="[965,1154,655,681]" italics="true" pageId="6" pageNumber="86">
|
||||
<taxonomicName id="4C3855CCFF87A375FC2214CB2D74FD6D" authorityName="Eisen" authorityYear="1878" box="[965,1150,655,681]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="genus">Mesenchytraeus</taxonomicName>
|
||||
,
|
||||
</emphasis>
|
||||
eleven species have free spermathecae and two diverticula (
|
||||
<taxonomicName id="4C3855CCFF87A375FDC014F72A59FD09" authority="Eisen, 1904" authorityName="Eisen" authorityYear="1904" box="[551,851,691,717]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="harrimani">
|
||||
<emphasis id="B94CF25DFF87A375FDC014F72BCBFD09" box="[551,705,691,717]" italics="true" pageId="6" pageNumber="86">M. harrimani</emphasis>
|
||||
<bibRefCitation id="EFA953BEFF87A375FD2E14F72A59FD09" author="Eisen, G." box="[713,851,691,717]" pageId="6" pageNumber="86" pagination="1 - 166" refId="ref7238" refString="Eisen, G. (1904) Enchytraeidae of the West Coast of North America, 12. Harriman Alaska Expedition. New York, pp. 1-166. https://doi.org/10.5962/bhl.title.11673" type="book chapter" year="1904">Eisen, 1904</bibRefCitation>
|
||||
</taxonomicName>
|
||||
;
|
||||
<taxonomicName id="4C3855CCFF87A375FC8714F72D7DFD09" authority="Welch, 1919" authorityName="Welch" authorityYear="1919" box="[864,1143,691,717]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="hydrius">
|
||||
<emphasis id="B94CF25DFF87A375FC8714F72AD6FD09" box="[864,988,691,717]" italics="true" pageId="6" pageNumber="86">M. hydrius</emphasis>
|
||||
<bibRefCitation id="EFA953BEFF87A375FC0214F72D7DFD09" author="Welch, P. S." box="[997,1143,691,717]" pageId="6" pageNumber="86" pagination="175 - 188" refId="ref8689" refString="Welch, P. S. (1919) Further studies on North American Mesenchytraeids (Oligochaeta). Transactions of the American Microscopical Society, 38, 175-188. https://doi.org/10.2307/3221532" type="journal article" year="1919">Welch, 1919</bibRefCitation>
|
||||
</taxonomicName>
|
||||
;
|
||||
<taxonomicName id="4C3855CCFF87A375FB6214F72C9DFD09" authority="Welch, 1916" authorityName="Welch" authorityYear="1916" box="[1157,1431,691,717]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="gelidus">
|
||||
<emphasis id="B94CF25DFF87A375FB6214F72DF7FD09" box="[1157,1277,691,717]" italics="true" pageId="6" pageNumber="86">M. gelidus</emphasis>
|
||||
<bibRefCitation id="EFA953BEFF87A375FAE114F72C9DFD09" author="Welch, P. S." box="[1286,1431,691,717]" pageId="6" pageNumber="86" pagination="85 - 124" refId="ref8646" refString="Welch, P. S. (1916) Snow-field and glacier Oligochaeta from Mt. Rainier, Washington. Transactions of the American Microscopical Society, 35, 85-124. https://doi.org/10.2307/3221561" type="journal article" year="1916">Welch, 1916</bibRefCitation>
|
||||
</taxonomicName>
|
||||
;
|
||||
<taxonomicName id="4C3855CCFF87A375FF70149328CFFD35" authority="Eisen, 1904" authorityName="Eisen" authorityYear="1904" box="[151,453,727,753]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="maculatus">
|
||||
<emphasis id="B94CF25DFF87A375FF7014932838FD35" box="[151,306,727,753]" italics="true" pageId="6" pageNumber="86">M. maculatus</emphasis>
|
||||
<bibRefCitation id="EFA953BEFF87A375FEDC149328CFFD35" author="Eisen, G." box="[315,453,727,753]" pageId="6" pageNumber="86" pagination="1 - 166" refId="ref7238" refString="Eisen, G. (1904) Enchytraeidae of the West Coast of North America, 12. Harriman Alaska Expedition. New York, pp. 1-166. https://doi.org/10.5962/bhl.title.11673" type="book chapter" year="1904">Eisen, 1904</bibRefCitation>
|
||||
</taxonomicName>
|
||||
;
|
||||
<taxonomicName id="4C3855CCFF87A375FE3414932A4EFD35" authority="Altman, 1936" authorityName="Altman" authorityYear="1936" box="[467,836,727,753]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="chromophorus">
|
||||
<emphasis id="B94CF25DFF87A375FE3414932B97FD35" box="[467,669,727,753]" italics="true" pageId="6" pageNumber="86">M. chromophorus</emphasis>
|
||||
<bibRefCitation id="EFA953BEFF87A375FD4214932A4EFD35" author="Altman, L. C." box="[677,836,727,753]" pageId="6" pageNumber="86" pagination="1 - 137" refId="ref6383" refString="Altman, L. C. (1936) Oligochaeta of Washington. University of Washington Publications in Biology, 4, 1-137." type="journal article" year="1936">Altman, 1936</bibRefCitation>
|
||||
</taxonomicName>
|
||||
;
|
||||
<taxonomicName id="4C3855CCFF87A375FCB514932D60FD35" authority="Eisen, 1904" authorityName="Eisen" authorityYear="1904" box="[850,1130,727,753]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="setchelli">
|
||||
<emphasis id="B94CF25DFF87A375FCB514932ADDFD35" box="[850,983,727,753]" italics="true" pageId="6" pageNumber="86">M. setchelli</emphasis>
|
||||
<bibRefCitation id="EFA953BEFF87A375FC0714932D60FD35" author="Eisen, G." box="[992,1130,727,753]" pageId="6" pageNumber="86" pagination="1 - 166" refId="ref7238" refString="Eisen, G. (1904) Enchytraeidae of the West Coast of North America, 12. Harriman Alaska Expedition. New York, pp. 1-166. https://doi.org/10.5962/bhl.title.11673" type="book chapter" year="1904">Eisen, 1904</bibRefCitation>
|
||||
</taxonomicName>
|
||||
;
|
||||
<taxonomicName id="4C3855CCFF87A375FB9F14932C9DFD35" authority="Eisen, 1904" authorityName="Eisen" authorityYear="1904" box="[1144,1431,727,753]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="obscurus">
|
||||
<emphasis id="B94CF25DFF87A375FB9F14932C0EFD35" box="[1144,1284,727,753]" italics="true" pageId="6" pageNumber="86">M. obscurus</emphasis>
|
||||
<bibRefCitation id="EFA953BEFF87A375FAE914932C9DFD35" author="Eisen, G." box="[1294,1431,727,753]" pageId="6" pageNumber="86" pagination="1 - 166" refId="ref7238" refString="Eisen, G. (1904) Enchytraeidae of the West Coast of North America, 12. Harriman Alaska Expedition. New York, pp. 1-166. https://doi.org/10.5962/bhl.title.11673" type="book chapter" year="1904">Eisen, 1904</bibRefCitation>
|
||||
</taxonomicName>
|
||||
;
|
||||
<taxonomicName id="4C3855CCFF87A375FF7014BF28E8FCD1" authority="Eisen, 1904" authorityName="Eisen" authorityYear="1904" box="[151,482,763,789]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="franciscanus">
|
||||
<emphasis id="B94CF25DFF87A375FF7014BF2844FCD1" box="[151,334,763,789]" italics="true" pageId="6" pageNumber="86">M. franciscanus</emphasis>
|
||||
<bibRefCitation id="EFA953BEFF87A375FEBF14BF28E8FCD1" author="Eisen, G." box="[344,482,763,789]" pageId="6" pageNumber="86" pagination="1 - 166" refId="ref7238" refString="Eisen, G. (1904) Enchytraeidae of the West Coast of North America, 12. Harriman Alaska Expedition. New York, pp. 1-166. https://doi.org/10.5962/bhl.title.11673" type="book chapter" year="1904">Eisen, 1904</bibRefCitation>
|
||||
</taxonomicName>
|
||||
;
|
||||
<taxonomicName id="4C3855CCFF87A375FE1614BF2A96FCD1" authority="Rota & Brinkhurst, 2000" authorityName="Rota & Brinkhurst" authorityYear="2000" box="[497,924,763,789]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="antaeus">
|
||||
<emphasis id="B94CF25DFF87A375FE1614BF2B7AFCD0" box="[497,624,763,788]" italics="true" pageId="6" pageNumber="86">M. antaeus</emphasis>
|
||||
<bibRefCitation id="EFA953BEFF87A375FD9D14BF2A96FCD1" author="Rota, E. & Brinkhurst, R. O." box="[634,924,763,789]" pageId="6" pageNumber="86" pagination="27 - 40" refId="ref8028" refString="Rota, E. & Brinkhurst, R. O. (2000) Mesenchytraeus antaeus, a new giant enchytraeid (Annelida, Clitellata) from the temperate rainforest of British Columbia, Canada, with a revised diagnosis of the genus Mesenchytraeus. The Journal of Zoology, 252, 27-40. https://doi.org/10.1111/j.1469-7998.2000.tb00817.x" type="journal article" year="2000">Rota & Brinkhurst, 2000</bibRefCitation>
|
||||
</taxonomicName>
|
||||
;
|
||||
<taxonomicName id="4C3855CCFF87A375FC4D14BF2DBAFCD1" authority="Bell, 1962" authorityName="Bell" authorityYear="1962" box="[938,1200,763,789]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="arcticus">
|
||||
<emphasis id="B94CF25DFF87A375FC4D14BF2D21FCD0" box="[938,1067,763,788]" italics="true" pageId="6" pageNumber="86">M. arcticus</emphasis>
|
||||
<bibRefCitation id="EFA953BEFF87A375FBD214BF2DBAFCD1" author="Bell, A. W." box="[1077,1200,763,789]" pageId="6" pageNumber="86" pagination="158 - 178" refId="ref6595" refString="Bell, A. W. (1962) Enchytraeids (Oligochaeta) from various parts of the world. Transactions of the American Microscopical Society, 81, 158-178. https://doi.org/10.2307/3223675" type="journal article" year="1962">Bell, 1962</bibRefCitation>
|
||||
</taxonomicName>
|
||||
;
|
||||
<taxonomicName id="4C3855CCFF87A375FB5914BF2B2EFCFD" authority="Christensen & Dozsa-Farkas, 1999" authorityName="Christensen & Dozsa-Farkas" authorityYear="1999" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="melanocephalus">
|
||||
<emphasis id="B94CF25DFF87A375FB5914BF2C96FCD1" box="[1214,1436,763,789]" italics="true" pageId="6" pageNumber="86">M. melanocephalus</emphasis>
|
||||
<bibRefCitation id="EFA953BEFF87A375FF70155B2B2EFCFD" author="Christensen, B. & Dozsa-Farkas, K." box="[151,548,799,825]" pageId="6" pageNumber="86" pagination="1 - 37" refId="ref6892" refString="Christensen, B. & Dozsa-Farkas, K. (1999) The enchytraeid fauna of the Palearctic tundra (Oligochaeta, Enchytraeidae). Biologiske Skrifter Dan Vid Selsk, 52, 1-37." type="journal article" year="1999">Christensen & Dózsa-Farkas, 1999</bibRefCitation>
|
||||
</taxonomicName>
|
||||
) (
|
||||
<bibRefCitation id="EFA953BEFF87A375FDDA155B2BCDFCFD" author="Eisen, G." box="[573,711,799,825]" pageId="6" pageNumber="86" pagination="1 - 166" refId="ref7238" refString="Eisen, G. (1904) Enchytraeidae of the West Coast of North America, 12. Harriman Alaska Expedition. New York, pp. 1-166. https://doi.org/10.5962/bhl.title.11673" type="book chapter" year="1904">Eisen, 1904</bibRefCitation>
|
||||
;
|
||||
<bibRefCitation id="EFA953BEFF87A375FD33155B2A6FFCFD" author="Welch, P. S." box="[724,869,799,825]" pageId="6" pageNumber="86" pagination="85 - 124" refId="ref8646" refString="Welch, P. S. (1916) Snow-field and glacier Oligochaeta from Mt. Rainier, Washington. Transactions of the American Microscopical Society, 35, 85-124. https://doi.org/10.2307/3221561" type="journal article" year="1916">Welch, 1916</bibRefCitation>
|
||||
;
|
||||
<bibRefCitation id="EFA953BEFF87A375FC97155B2D05FCFD" author="Altman, L. C." box="[880,1039,799,825]" pageId="6" pageNumber="86" pagination="1 - 137" refId="ref6383" refString="Altman, L. C. (1936) Oligochaeta of Washington. University of Washington Publications in Biology, 4, 1-137." type="journal article" year="1936">Altman, 1936</bibRefCitation>
|
||||
;
|
||||
<bibRefCitation id="EFA953BEFF87A375FBFB155B2D9FFCFD" author="Bell, A. W." box="[1052,1173,799,825]" pageId="6" pageNumber="86" pagination="158 - 178" refId="ref6595" refString="Bell, A. W. (1962) Enchytraeids (Oligochaeta) from various parts of the world. Transactions of the American Microscopical Society, 81, 158-178. https://doi.org/10.2307/3223675" type="journal article" year="1962">Bell, 1962</bibRefCitation>
|
||||
;
|
||||
<bibRefCitation id="EFA953BEFF87A375FB45155B2820FC99" author="Christensen, B. & Dozsa-Farkas, K." pageId="6" pageNumber="86" pagination="1 - 37" refId="ref6892" refString="Christensen, B. & Dozsa-Farkas, K. (1999) The enchytraeid fauna of the Palearctic tundra (Oligochaeta, Enchytraeidae). Biologiske Skrifter Dan Vid Selsk, 52, 1-37." type="journal article" year="1999">Christensen & Dózsa-Farkas, 1999</bibRefCitation>
|
||||
;
|
||||
<bibRefCitation id="EFA953BEFF87A375FED315072B46FC99" author="Rota, E. & Brinkhurst, R. O." box="[308,588,835,861]" pageId="6" pageNumber="86" pagination="27 - 40" refId="ref8028" refString="Rota, E. & Brinkhurst, R. O. (2000) Mesenchytraeus antaeus, a new giant enchytraeid (Annelida, Clitellata) from the temperate rainforest of British Columbia, Canada, with a revised diagnosis of the genus Mesenchytraeus. The Journal of Zoology, 252, 27-40. https://doi.org/10.1111/j.1469-7998.2000.tb00817.x" type="journal article" year="2000">Rota & Brinkhurst, 2000</bibRefCitation>
|
||||
). Most of these species are large or very large worms. From all these species,
|
||||
<taxonomicName id="4C3855CCFF87A375FF70152328E0FC45" authorityName="Dózsa-Farkas & Makarova" authorityYear="2025" box="[151,490,871,897]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="tschukotensis" status="sp. nov.">
|
||||
<emphasis id="B94CF25DFF87A375FF70152328E0FC45" box="[151,490,871,897]" italics="true" pageId="6" pageNumber="86">Mesenchytraeus tschukotensis</emphasis>
|
||||
</taxonomicName>
|
||||
<emphasis id="B94CF25DFF87A375FE1415232B44FC45" bold="true" box="[499,590,871,897]" pageId="6" pageNumber="86">
|
||||
<taxonomicNameLabel id="A27F4F26FF87A375FE1415232B44FC45" box="[499,590,871,897]" pageId="6" pageNumber="86" rank="species">sp. nov.</taxonomicNameLabel>
|
||||
</emphasis>
|
||||
differs by having two or three spermathecal diverticula, whereas the other species have always only two ones.
|
||||
<taxonomicName id="4C3855CCFF87A375FDD815CF2BD0FC61" authorityName="Eisen" authorityYear="1904" box="[575,730,907,933]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="harrimani">
|
||||
<emphasis id="B94CF25DFF87A375FDD815CF2BD0FC61" box="[575,730,907,933]" italics="true" pageId="6" pageNumber="86">M. harrimani</emphasis>
|
||||
</taxonomicName>
|
||||
is also pigmented but can be distinguished by the following features:
|
||||
<taxonomicName id="4C3855CCFF87A375FF1815EB289DFC0D" authorityName="Eisen" authorityYear="1904" box="[255,407,943,969]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="harrimani">
|
||||
<emphasis id="B94CF25DFF87A375FF1815EB289DFC0D" box="[255,407,943,969]" italics="true" pageId="6" pageNumber="86">M. harrimani</emphasis>
|
||||
</taxonomicName>
|
||||
is larger,>
|
||||
<quantity id="4CC083AAFF87A375FDF115EB2B6CFC0D" box="[534,614,943,969]" metricMagnitude="-2" metricUnit="m" metricValue="6.0" pageId="6" pageNumber="86" unit="mm" value="60.0">60 mm</quantity>
|
||||
long, with>100 segments (after
|
||||
<bibRefCitation id="EFA953BEFF87A375FC3C15EB2D6EFC0D" author="Eisen, G." box="[987,1124,943,969]" pageId="6" pageNumber="86" pagination="1 - 166" refId="ref7238" refString="Eisen, G. (1904) Enchytraeidae of the West Coast of North America, 12. Harriman Alaska Expedition. New York, pp. 1-166. https://doi.org/10.5962/bhl.title.11673" type="book chapter" year="1904">Eisen, 1904</bibRefCitation>
|
||||
),
|
||||
<quantity id="4CC083AAFF87A375FB9F15EA2DFBFC0D" box="[1144,1265,942,969]" metricMagnitude="-2" metricUnit="m" metricValue="4.4" metricValueMax="5.0" metricValueMin="3.8" pageId="6" pageNumber="86" unit="mm" value="44.0" valueMax="50.0" valueMin="38.0">38–50 mm</quantity>
|
||||
long, with 90– 113 segments (Dózsa-Farkas, unpublished observations on new material) whereas
|
||||
<taxonomicName id="4C3855CCFF87A375FBD215972DFAFC29" authorityName="Dózsa-Farkas & Makarova" authorityYear="2025" box="[1077,1264,979,1005]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="tschukotensis" status="sp. nov.">
|
||||
<emphasis id="B94CF25DFF87A375FBD215972DFAFC29" box="[1077,1264,979,1005]" italics="true" pageId="6" pageNumber="86">M. tschukotensis</emphasis>
|
||||
</taxonomicName>
|
||||
<emphasis id="B94CF25DFF87A375FB1015972C5BFC29" bold="true" box="[1271,1361,979,1005]" pageId="6" pageNumber="86">
|
||||
<taxonomicNameLabel id="A27F4F26FF87A375FB1015972C5BFC29" box="[1271,1361,979,1005]" pageId="6" pageNumber="86" rank="species">sp. nov.</taxonomicNameLabel>
|
||||
</emphasis>
|
||||
is
|
||||
<quantity id="4CC083AAFF87A375FA95159729ECFBD5" metricMagnitude="-2" metricUnit="m" metricValue="2.6" metricValueMax="3.3" metricValueMin="1.9" pageId="6" pageNumber="86" unit="mm" value="26.0" valueMax="33.0" valueMin="19.0">19– 33 mm</quantity>
|
||||
long, with 65–78 segments. The sperm funnel is much longer, extending backwards to segments XX–XXIII in the sperm sac (
|
||||
<emphasis id="B94CF25DFF87A375FEBC125F2878FBF0" box="[347,370,1051,1076]" italics="true" pageId="6" pageNumber="86">vs</emphasis>
|
||||
located only in segments XI–XII in
|
||||
<taxonomicName id="4C3855CCFF87A375FCEF125F2AC8FBF1" authorityName="Dózsa-Farkas & Makarova" authorityYear="2025" box="[776,962,1051,1077]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="tschukotensis" status="sp. nov.">
|
||||
<emphasis id="B94CF25DFF87A375FCEF125F2AC8FBF1" box="[776,962,1051,1077]" italics="true" pageId="6" pageNumber="86">M. tschukotensis</emphasis>
|
||||
</taxonomicName>
|
||||
<emphasis id="B94CF25DFF87A375FC2E125F2D28FBF1" bold="true" box="[969,1058,1051,1077]" pageId="6" pageNumber="86">
|
||||
<taxonomicNameLabel id="A27F4F26FF87A375FC2E125F2D28FBF1" box="[969,1058,1051,1077]" pageId="6" pageNumber="86" rank="species">sp. nov.</taxonomicNameLabel>
|
||||
</emphasis>
|
||||
). The sperm sac and egg-sac both extend also more backwards, at maximum to segments XLIII–XLVI (
|
||||
<emphasis id="B94CF25DFF87A375FC70127B2AA4FB9C" box="[919,942,1087,1112]" italics="true" pageId="6" pageNumber="86">vs</emphasis>
|
||||
XX–XXIV), the atrium and atrial glands are longer, 500–800 µm and 600–800 µm long, respectively (
|
||||
<emphasis id="B94CF25DFF87A375FCFB12272A39FBB8" box="[796,819,1123,1148]" italics="true" pageId="6" pageNumber="86">vs</emphasis>
|
||||
300–475 µm and 200–300 µm long, respectively). The diameter of the penial bulb is larger (700–900 µm,
|
||||
<emphasis id="B94CF25DFF87A375FD2C12C32BE8FB64" box="[715,738,1159,1184]" italics="true" pageId="6" pageNumber="86">vs</emphasis>
|
||||
270–330 µm) and has a muscle layer around the penial glands, but in
|
||||
<taxonomicName id="4C3855CCFF87A375FF3B12EF289FFB01" authorityName="Dózsa-Farkas & Makarova" authorityYear="2025" box="[220,405,1195,1221]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="tschukotensis" status="sp. nov.">
|
||||
<emphasis id="B94CF25DFF87A375FF3B12EF289FFB01" box="[220,405,1195,1221]" italics="true" pageId="6" pageNumber="86">M. tschukotensis</emphasis>
|
||||
</taxonomicName>
|
||||
<emphasis id="B94CF25DFF87A375FE7B12EF28FEFB01" bold="true" box="[412,500,1195,1221]" pageId="6" pageNumber="86">
|
||||
<taxonomicNameLabel id="A27F4F26FF87A375FE7B12EF28FEFB01" box="[412,500,1195,1221]" pageId="6" pageNumber="86" rank="species">sp. nov.</taxonomicNameLabel>
|
||||
</emphasis>
|
||||
this layer is absent. The spermathecal ectal duct is shorter (250–400 µm,
|
||||
<emphasis id="B94CF25DFF87A375FAFA12EF2C3EFB00" box="[1309,1332,1195,1220]" italics="true" pageId="6" pageNumber="86">vs</emphasis>
|
||||
500–980 µm).Another species with a similar shape of spermatheca,
|
||||
<taxonomicName id="4C3855CCFF87A375FCFA128B2A9EFB2D" authorityName="Welch" authorityYear="1919" box="[797,916,1231,1257]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="hydrius">
|
||||
<emphasis id="B94CF25DFF87A375FCFA128B2A9EFB2D" box="[797,916,1231,1257]" italics="true" pageId="6" pageNumber="86">M. hydrius</emphasis>
|
||||
</taxonomicName>
|
||||
, is not pigmented, in the lateral chaetal bundles there are more chaetae (4–7,
|
||||
<emphasis id="B94CF25DFF87A375FE3A12B728FEFAC8" box="[477,500,1267,1292]" italics="true" pageId="6" pageNumber="86">vs</emphasis>
|
||||
<quantity id="4CC083AAFF87A375FE1B12B72B49FAC9" box="[508,579,1267,1293]" metricMagnitude="-2" metricUnit="m" metricValue="5.08" metricValueMax="7.62" metricValueMin="2.54" pageId="6" pageNumber="86" unit="in" value="2.0" valueMax="3.0" valueMin="1.0">1–3 in</quantity>
|
||||
<taxonomicName id="4C3855CCFF87A375FDAD12B72A0EFAC9" authorityName="Dózsa-Farkas & Makarova" authorityYear="2025" box="[586,772,1267,1293]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="tschukotensis" status="sp. nov.">
|
||||
<emphasis id="B94CF25DFF87A375FDAD12B72A0EFAC9" box="[586,772,1267,1293]" italics="true" pageId="6" pageNumber="86">M. tschukotensis</emphasis>
|
||||
</taxonomicName>
|
||||
<emphasis id="B94CF25DFF87A375FCEB12B72A6CFAC9" bold="true" box="[780,870,1267,1293]" pageId="6" pageNumber="86">
|
||||
<taxonomicNameLabel id="A27F4F26FF87A375FCEB12B72A6CFAC9" box="[780,870,1267,1293]" pageId="6" pageNumber="86" rank="species">sp. nov.</taxonomicNameLabel>
|
||||
</emphasis>
|
||||
), and these are not enlarged.
|
||||
<taxonomicName id="4C3855CCFF87A375FB5712B72C20FAC9" authorityName="Welch" authorityYear="1919" box="[1200,1322,1267,1293]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="hydrius">
|
||||
<emphasis id="B94CF25DFF87A375FB5712B72C20FAC9" box="[1200,1322,1267,1293]" italics="true" pageId="6" pageNumber="86">M. hydrius</emphasis>
|
||||
</taxonomicName>
|
||||
possesses only 5 atrial glands (
|
||||
<emphasis id="B94CF25DFF87A375FE671353289DFAF4" box="[384,407,1303,1328]" italics="true" pageId="6" pageNumber="86">vs</emphasis>
|
||||
8–10), and the spermathecal ectal duct is regularly thin (
|
||||
<emphasis id="B94CF25DFF87A375FBFF13532D25FAF4" box="[1048,1071,1303,1328]" italics="true" pageId="6" pageNumber="86">vs</emphasis>
|
||||
thicker ectally). The body of
|
||||
<taxonomicName id="4C3855CCFF87A375FA99135329E2FA91" authorityName="Welch" authorityYear="1916" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="gelidus">
|
||||
<emphasis id="B94CF25DFF87A375FA99135329E2FA91" italics="true" pageId="6" pageNumber="86">M. gelidus</emphasis>
|
||||
</taxonomicName>
|
||||
is almost of the same size, but more strongly pigmented, dark reddish brown or black; its lateral chaetal bundles have more chaetae (4–5,
|
||||
<emphasis id="B94CF25DFF87A375FDF6131B2B22FABC" box="[529,552,1375,1400]" italics="true" pageId="6" pageNumber="86">vs</emphasis>
|
||||
1–3) and are not enlarged; the sperm funnel is smaller, with a collar and more atrial glands (12,
|
||||
<emphasis id="B94CF25DFF87A375FEBE13C7287AFA58" box="[345,368,1411,1436]" italics="true" pageId="6" pageNumber="86">vs</emphasis>
|
||||
8–10); the spermathecal ectal duct is shorter with unicellular glands at the orifice.
|
||||
<taxonomicName id="4C3855CCFF87A375FAE213C72C96FA59" authorityName="Eisen" authorityYear="1904" box="[1285,1436,1411,1437]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="maculatus">
|
||||
<emphasis id="B94CF25DFF87A375FAE213C72C96FA59" box="[1285,1436,1411,1437]" italics="true" pageId="6" pageNumber="86">M. maculatus</emphasis>
|
||||
</taxonomicName>
|
||||
is larger,
|
||||
<quantity id="4CC083AAFF87A375FF1813E22872FA05" box="[255,376,1446,1473]" metricMagnitude="-2" metricUnit="m" metricValue="5.25" metricValueMax="6.0" metricValueMin="4.5" pageId="6" pageNumber="86" unit="mm" value="52.5" valueMax="60.0" valueMin="45.0">45–60 mm</quantity>
|
||||
long with 93 segments. The sperm duct is coiled in XII, not extending backwards, it has 12 or more atrial glands, and a large white shield around the spermathecal pores; the spermathecal diverticula are thinner and the ampulla extends only to VII–VIII (
|
||||
<emphasis id="B94CF25DFF87A375FD9813AB2B9CF9CC" box="[639,662,1519,1544]" italics="true" pageId="6" pageNumber="86">vs</emphasis>
|
||||
X–XII). An interesting agreement is noted between the new species and both
|
||||
<taxonomicName id="4C3855CCFF87A375FEE4105728C4F9E9" authorityName="Altman" authorityYear="1936" box="[259,462,1555,1581]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="chromophorus">
|
||||
M.
|
||||
<emphasis id="B94CF25DFF87A375FECB105728C4F9E9" box="[300,462,1555,1581]" italics="true" pageId="6" pageNumber="86">chromophorus</emphasis>
|
||||
</taxonomicName>
|
||||
and
|
||||
<taxonomicName id="4C3855CCFF87A375FDEE10572B8DF9E8" authorityName="Rota & Brinkhurst" authorityYear="2000" box="[521,647,1555,1580]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="antaeus">
|
||||
<emphasis id="B94CF25DFF87A375FDEE10572B8DF9E8" box="[521,647,1555,1580]" italics="true" pageId="6" pageNumber="86">M. antaeus</emphasis>
|
||||
</taxonomicName>
|
||||
in that the longest chaetae in the ventral and lateral bundles are also located laterally, in contrast to some of the other species listed above (the character is not described in all species) where in the ventral bundles the largest chaetae are located towards the ventral midline and the largest lateral chaetae in a bundle are found towards the dorsal midline. However, in
|
||||
<taxonomicName id="4C3855CCFF87A375FCA0103B2D07F95D" authorityName="Altman" authorityYear="1936" box="[839,1037,1663,1689]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="chromophorus">
|
||||
<emphasis id="B94CF25DFF87A375FCA0103B2D07F95D" box="[839,1037,1663,1689]" italics="true" pageId="6" pageNumber="86">M. chromophorus</emphasis>
|
||||
</taxonomicName>
|
||||
there are only four atrial glands and the dorsal vessel begins from XIII–XIV (
|
||||
<emphasis id="B94CF25DFF87A375FD8310E72B71F978" box="[612,635,1699,1724]" italics="true" pageId="6" pageNumber="86">vs</emphasis>
|
||||
XV–X in
|
||||
<taxonomicName id="4C3855CCFF87A375FD1710E72AA0F979" authorityName="Dózsa-Farkas & Makarova" authorityYear="2025" box="[752,938,1699,1725]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="tschukotensis" status="sp. nov.">
|
||||
<emphasis id="B94CF25DFF87A375FD1710E72AA0F979" box="[752,938,1699,1725]" italics="true" pageId="6" pageNumber="86">M. tschukotensis</emphasis>
|
||||
</taxonomicName>
|
||||
<emphasis id="B94CF25DFF87A375FC5610E72D06F979" bold="true" box="[945,1036,1699,1725]" pageId="6" pageNumber="86">
|
||||
<taxonomicNameLabel id="A27F4F26FF87A375FC5610E72D06F979" box="[945,1036,1699,1725]" pageId="6" pageNumber="86" rank="species">sp. nov.</taxonomicNameLabel>
|
||||
</emphasis>
|
||||
).
|
||||
<taxonomicName id="4C3855CCFF87A375FBC310E72DAAF978" authorityName="Rota & Brinkhurst" authorityYear="2000" box="[1060,1184,1699,1724]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="antaeus">
|
||||
<emphasis id="B94CF25DFF87A375FBC310E72DAAF978" box="[1060,1184,1699,1724]" italics="true" pageId="6" pageNumber="86">M. antaeus</emphasis>
|
||||
</taxonomicName>
|
||||
is much larger (
|
||||
<quantity id="4CC083AAFF87A375FAB210E729C9F925" metricMagnitude="-2" metricUnit="m" metricValue="4.7" metricValueMax="6.1" metricValueMin="3.3" pageId="6" pageNumber="86" unit="mm" value="47.0" valueMax="61.0" valueMin="33.0">33–61 mm</quantity>
|
||||
with 91–127 segments) and characteristically has two sets of large accessory glands.
|
||||
<taxonomicName id="4C3855CCFF87A375FB6210832C30F925" authorityName="Eisen" authorityYear="1904" box="[1157,1338,1735,1761]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="franciscanus">
|
||||
<emphasis id="B94CF25DFF87A375FB6210832C30F925" box="[1157,1338,1735,1761]" italics="true" pageId="6" pageNumber="86">M. franciscanus</emphasis>
|
||||
</taxonomicName>
|
||||
is also a large species (
|
||||
<quantity id="4CC083AAFF87A375FEDF10AF28BEF8C1" box="[312,436,1771,1797]" metricMagnitude="-2" metricUnit="m" metricValue="2.5" metricValueMax="3.0" metricValueMin="2.0" pageId="6" pageNumber="86" unit="mm" value="25.0" valueMax="30.0" valueMin="20.0">20–30 mm</quantity>
|
||||
with 78 segments), yellowish in colour, without pigment, it possesses a large accessory gland and the spermathecal diverticula are long and narrow. In
|
||||
<emphasis id="B94CF25DFF87A375FC86114B2AF9F8ED" box="[865,1011,1807,1833]" italics="true" pageId="6" pageNumber="86">
|
||||
<taxonomicName id="4C3855CCFF87A375FC86114B2AFAF8ED" authorityName="Eisen" authorityYear="1904" box="[865,1008,1807,1833]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="obscurus">M. obscurus</taxonomicName>
|
||||
,
|
||||
</emphasis>
|
||||
the spermathecal diverticula are long and thin, and the atrium is with 16–20 glands.
|
||||
<taxonomicName id="4C3855CCFF87A375FD7111772A12F889" authorityName="Eisen" authorityYear="1904" box="[662,792,1843,1869]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="setchelli">
|
||||
<emphasis id="B94CF25DFF87A375FD7111772A12F889" box="[662,792,1843,1869]" italics="true" pageId="6" pageNumber="86">M. setchelli</emphasis>
|
||||
</taxonomicName>
|
||||
is slightly smaller (only
|
||||
<quantity id="4CC083AAFF87A375FBCD11772D72F889" box="[1066,1144,1843,1869]" metricMagnitude="-2" metricUnit="m" metricValue="1.2" pageId="6" pageNumber="86" unit="mm" value="12.0">12 mm</quantity>
|
||||
long) and white in colour; the atrium is with 5 glands and the spermathecal diverticula are ovoid with a thick epithelium.
|
||||
<taxonomicName id="4C3855CCFF87A375FB4A11132C21F8B4" authorityName="Bell" authorityYear="1962" box="[1197,1323,1879,1904]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="arcticus">
|
||||
<emphasis id="B94CF25DFF87A375FB4A11132C21F8B4" box="[1197,1323,1879,1904]" italics="true" pageId="6" pageNumber="86">M. arcticus</emphasis>
|
||||
</taxonomicName>
|
||||
is smaller (
|
||||
<quantity id="4CC083AAFF87A375FF78113F29FBF851" box="[159,241,1915,1941]" metricMagnitude="-2" metricUnit="m" metricValue="2.0" pageId="6" pageNumber="86" unit="mm" value="20.0">20 mm</quantity>
|
||||
, with 70 segments); in the lateral chaetal bundles there are more chaetae (3–6, not enlarged); it possesses 7 atrial glands and one „accessory apparatus”; the spermatheca extends backwards only into VII or VIII, its ectal duct and diverticula are shorter (both 200 µm long). Finally,
|
||||
<taxonomicName id="4C3855CCFF87A375FCF711872AE6F819" authorityName="Christensen & Dozsa-Farkas" authorityYear="1999" box="[784,1004,1987,2013]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="6" pageNumber="86" phylum="Annelida" rank="species" species="melanocephalus">
|
||||
<emphasis id="B94CF25DFF87A375FCF711872AE6F819" box="[784,1004,1987,2013]" italics="true" pageId="6" pageNumber="86">M. melanocephalus</emphasis>
|
||||
</taxonomicName>
|
||||
is pigmented, but smaller (
|
||||
<quantity id="4CC083AAFF87A375FAC611872C97F819" box="[1313,1437,1987,2013]" metricMagnitude="-2" metricUnit="m" metricValue="1.8" metricValueMax="2.2" metricValueMin="1.4" pageId="6" pageNumber="86" unit="mm" value="18.0" valueMax="22.0" valueMin="14.0">14–22 mm</quantity>
|
||||
with 44–58 segments); in the lateral bundles of segments VI–VIII it has only one typical enlarged chaeta; the sperm funnel is very short (140–340 µm long), with 5–6 atrial glands and two accessory glands; the spermatheca extends only into V–VI and both ectal duct and ampulla are also shorter (200–240 µm long). It should be noted that all species compared here with
|
||||
<taxonomicName id="4C3855CCFF86A374FE3217472B82FED9" authorityName="Dózsa-Farkas & Makarova" authorityYear="2025" box="[469,648,259,285]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="7" pageNumber="87" phylum="Annelida" rank="species" species="tschukotensis" status="sp. nov.">
|
||||
<emphasis id="B94CF25DFF86A374FE3217472B82FED9" box="[469,648,259,285]" italics="true" pageId="7" pageNumber="87">M tschukotensis</emphasis>
|
||||
</taxonomicName>
|
||||
<emphasis id="B94CF25DFF86A374FD7717472BE3FED9" bold="true" box="[656,745,259,285]" pageId="7" pageNumber="87">
|
||||
<taxonomicNameLabel id="A27F4F26FF86A374FD7717472BE3FED9" box="[656,745,259,285]" pageId="7" pageNumber="87" rank="species">sp. nov.</taxonomicNameLabel>
|
||||
</emphasis>
|
||||
are known morphologically only from the respective original descriptions,
|
||||
<taxonomicName id="4C3855CCFF86A374FECB17632B02FE85" authorityName="Christensen & Dozsa-Farkas" authorityYear="1999" box="[300,520,295,321]" class="Clitellata" family="Enchytraeidae" genus="Mesenchytraeus" kingdom="Animalia" order="Enchytraeida" pageId="7" pageNumber="87" phylum="Annelida" rank="species" species="melanocephalus">
|
||||
<emphasis id="B94CF25DFF86A374FECB17632B02FE85" box="[300,520,295,321]" italics="true" pageId="7" pageNumber="87">M. melanocephalus</emphasis>
|
||||
</taxonomicName>
|
||||
excepted (see
|
||||
<bibRefCitation id="EFA953BEFF86A374FD4A17632D33FE85" author="Christensen, B. & Dozsa-Farkas, K." box="[685,1081,295,321]" pageId="7" pageNumber="87" pagination="1 - 37" refId="ref6892" refString="Christensen, B. & Dozsa-Farkas, K. (1999) The enchytraeid fauna of the Palearctic tundra (Oligochaeta, Enchytraeidae). Biologiske Skrifter Dan Vid Selsk, 52, 1-37." type="journal article" year="1999">Christensen & Dózsa-Farkas, 1999</bibRefCitation>
|
||||
).
|
||||
</paragraph>
|
||||
</subSubSection>
|
||||
<subSubSection id="C3227DC4FF86A374FF20170E2806FE4D" pageId="7" pageNumber="87" type="distribution">
|
||||
<paragraph id="8B872E4FFF86A374FF20170E2806FE4D" blockId="7.[151,1437,150,393]" pageId="7" pageNumber="87">
|
||||
<emphasis id="B94CF25DFF86A374FF20170E286BFEA0" bold="true" box="[199,353,330,356]" pageId="7" pageNumber="87">Distribution.</emphasis>
|
||||
Until now, this species is only known from the
|
||||
<typeStatus id="548390EDFF86A374FC7B170F2AC6FEA1" box="[924,972,331,357]" pageId="7" pageNumber="87">type</typeStatus>
|
||||
locality, in the very east of the Chukot Peninsula.
|
||||
</paragraph>
|
||||
</subSubSection>
|
||||
</treatment>
|
||||
</document>
|
||||
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Reference in a new issue