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<document id="9210E9E50240826FB7739DA316F03DFF" ID-DOI="10.11646/zootaxa.2324.1.1" ID-ISSN="1175­5334" ID-Zenodo-Dep="5313036" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1629658541690" checkinUser="felipe" docAuthor="Karanovic, Tomislav &amp; Hancock, Peter" docDate="2009" docId="4C338790FF81FFD561FDFF0F6B294D2D" docLanguage="en" docName="zt02324p085.pdf" docOrigin="Zootaxa 2324 (1)" docSource="https://biotaxa.org/Zootaxa/article/view/zootaxa.2324.1.1" docStyle="DocumentStyle:D239614CE4198176A422035174489AB1.4:Zootaxa.2009-2012.monograph" docStyleId="D239614CE4198176A422035174489AB1" docStyleName="Zootaxa.2009-2012.monograph" docStyleVersion="4" docTitle="Megastygonitocrella dec Karanovic &amp; Hancock 2009, sp. nov." docType="treatment" docVersion="5" lastPageNumber="55" masterDocId="B00AFFE8FFB0FFE3616AFF986E37497F" masterDocTitle="On the diagnostic characters of the genus Stygonitocrella (Copepoda, Harpacticoida), with descriptions of seven new species from Australian subterranean waters 2324" masterLastPageNumber="85" masterPageNumber="1" pageNumber="50" updateTime="1699090780369" updateUser="plazi" zenodo-license-document="CLOSED">
<mods:mods id="B6C3E700DBF0F9C5843011F6302DADB7" xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:title id="56355D97B111FF7A8EEBAE38C4F2EB24">On the diagnostic characters of the genus Stygonitocrella (Copepoda, Harpacticoida), with descriptions of seven new species from Australian subterranean waters 2324</mods:title>
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<mods:namePart id="5A88E12790F844F2B65098E455A50A2F">Karanovic, Tomislav</mods:namePart>
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<mods:namePart id="E1D00FDB7D79EF80C485F1F183F0FB3F">Hancock, Peter</mods:namePart>
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<mods:title id="D51E8D80F8C11382BE8E5118B8B9414F">Zootaxa</mods:title>
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<mods:date id="7E4185512D5AA0A4483386EF55391CF6">2009</mods:date>
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<mods:number id="00EC26625A28ACA846E1C8D8F12DED9F">2009-12-22</mods:number>
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<mods:number id="025E1EC7200F38BF57FF9CC3E1F0D73F">2324</mods:number>
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<mods:classification id="B074DA156F94FE09AD7EAB05020D44E6">journal article</mods:classification>
<mods:identifier id="E640BBF6745A84DB25D0B61B1760FD7A" type="DOI">10.11646/zootaxa.2324.1.1</mods:identifier>
<mods:identifier id="C5F639E8223FABDB41FC063EBCE9DA94" type="ISSN">1175­5334</mods:identifier>
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<treatment id="4C338790FF81FFD561FDFF0F6B294D2D" ID-DOI="http://doi.org/10.5281/zenodo.5321236" ID-Zenodo-Dep="5321236" LSID="urn:lsid:plazi:treatment:4C338790FF81FFD561FDFF0F6B294D2D" httpUri="http://treatment.plazi.org/id/4C338790FF81FFD561FDFF0F6B294D2D" lastPageId="54" lastPageNumber="55" pageId="49" pageNumber="50">
<subSubSection id="8C80650DFF81FFD261FDFF0F6C1649CE" box="[151,545,151,177]" pageId="49" pageNumber="50" type="nomenclature">
<paragraph id="C4253686FF81FFD261FDFF0F6C1649CE" blockId="49.[151,545,151,212]" box="[151,545,151,177]" pageId="49" pageNumber="50">
<heading id="9F6D81EAFF81FFD261FDFF0F6C1649CE" bold="true" box="[151,545,151,177]" fontSize="11" level="1" pageId="49" pageNumber="50" reason="1">
<emphasis id="F6EEEA94FF81FFD261FDFF0F6C1649CE" bold="true" box="[151,545,151,177]" pageId="49" pageNumber="50">
<taxonomicName id="039A4D05FF81FFD261FDFF0F6F8A49CE" authority="Karanovic &amp; Hancock, 2009" authorityName="Karanovic &amp; Hancock" authorityYear="2009" box="[151,445,151,177]" class="Hexanauplia" family="Ameiridae" genus="Megastygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="49" pageNumber="50" phylum="Arthropoda" rank="species" species="dec" status="sp. nov.">
<emphasis id="F6EEEA94FF81FFD261FDFF0F6F8A49CE" bold="true" box="[151,445,151,177]" italics="true" pageId="49" pageNumber="50">Megastygonitocrella dec</emphasis>
</taxonomicName>
<taxonomicNameLabel id="EDDD57EFFF81FFD260AEFF0F6C1649CE" box="[452,545,151,177]" pageId="49" pageNumber="50" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="8C80650DFF81FFD261FDFF226F1A49AB" box="[151,301,186,212]" pageId="49" pageNumber="50" type="description">
<paragraph id="C4253686FF81FFD261FDFF226F1A49AB" blockId="49.[151,545,151,212]" box="[151,301,186,212]" pageId="49" pageNumber="50">
(
<figureCitation id="5CA12A03FF81FFD261F5FF226F1349AB" box="[159,292,186,212]" captionStart-0="FIGURE 10" captionStart-1="FIGURE 11" captionStartId-0="50.[151,255,1956,1980]" captionStartId-1="51.[151,257,1836,1860]" captionTargetBox-0="[205,1385,217,1884]" captionTargetBox-1="[234,1376,203,1798]" captionTargetId-0="figure-48@50.[151,1436,194,1968]" captionTargetId-1="figure-103@51.[180,1414,170,1873]" captionTargetPageId-0="50" captionTargetPageId-1="51" captionText-0="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." captionText-1="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi-0="http://doi.org/10.5281/zenodo.5313064" figureDoi-1="http://doi.org/10.5281/zenodo.5313068" httpUri-0="https://zenodo.org/record/5313064/files/figure.png" httpUri-1="https://zenodo.org/record/5313068/files/figure.png" pageId="49" pageNumber="50">Figs 10–11</figureCitation>
)
</paragraph>
</subSubSection>
<subSubSection id="8C80650DFF81FFD261FDFE9F6F0F48C3" pageId="49" pageNumber="50" type="materials_examined">
<paragraph id="C4253686FF81FFD261FDFE9F6F0F48C3" blockId="49.[151,1437,263,2030]" pageId="49" pageNumber="50">
<emphasis id="F6EEEA94FF81FFD261FDFE9F6F7A485E" bold="true" box="[151,333,263,289]" pageId="49" pageNumber="50">Type material.</emphasis>
<materialsCitation id="74F23CDBFF81FFD2603EFE906F0F48C3" accessionNumber="C37348, C37349, C37350, C37351" collectingDate="2003-11-18" collectionCode="WAM" collectorName="J. Cocking &amp; M. Scanlon" country="Australia" latitude="-21.60389" location="Yule River" longLatPrecision="21" longitude="118.81694" municipality="Pilbara region" pageId="49" pageNumber="50" specimenCount="3" specimenCount-female="2" specimenCount-male="1" stateProvince="Western Australia" typeStatus="holotype">
<typeStatus id="1B218824FF81FFD2603EFE906FF3485D" box="[340,452,264,290]" pageId="49" pageNumber="50" type="holotype">Holotype</typeStatus>
, adult female dissected on one slide (
<collectionCode id="A28BAE43FF81FFD26213FE906DF4485D" box="[889,963,264,290]" country="Australia" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34981" lsid="urn:lsid:biocol.org:col:34981" name="Western Australian Museum" pageId="49" pageNumber="50" type="Museum">WAM</collectionCode>
C37348);
<typeStatus id="1B218824FF81FFD2652AFE906A96485D" box="[1088,1185,264,290]" pageId="49" pageNumber="50" type="allotype">allotype</typeStatus>
, adult male dissected on one slide (
<collectionCode id="A28BAE43FF81FFD2605BFEB66F4C4837" box="[305,379,302,328]" country="Australia" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34981" lsid="urn:lsid:biocol.org:col:34981" name="Western Australian Museum" pageId="49" pageNumber="50" type="Museum">WAM</collectionCode>
C37349);
<typeStatus id="1B218824FF81FFD2609DFEB66C5B4837" box="[503,620,302,328]" pageId="49" pageNumber="50" type="paratype">paratypes</typeStatus>
:
<specimenCount id="D29CFD0FFF81FFD2631CFEB66CC04837" box="[630,759,302,328]" pageId="49" pageNumber="50" type="female">one female</specimenCount>
dissected on one slide (
<collectionCode id="A28BAE43FF81FFD26563FEB66A644837" box="[1033,1107,302,328]" country="Australia" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34981" lsid="urn:lsid:biocol.org:col:34981" name="Western Australian Museum" pageId="49" pageNumber="50" type="Museum">WAM</collectionCode>
C37350) and
<specimenCount id="D29CFD0FFF81FFD26592FEB66B524837" box="[1272,1381,302,328]" pageId="49" pageNumber="50" type="male">one male</specimenCount>
,
<specimenCount id="D29CFD0FFF81FFD2641AFEB66EC44810" pageId="49" pageNumber="50" type="female">two females</specimenCount>
and 11 copepodids preserved in 70% ethanol (
<collectionCode id="A28BAE43FF81FFD26275FECD6D5E4810" box="[799,873,341,367]" country="Australia" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34981" lsid="urn:lsid:biocol.org:col:34981" name="Western Australian Museum" pageId="49" pageNumber="50" type="Museum">WAM</collectionCode>
C37351);
<collectingCountry id="BC8D7616FF81FFD26283FECD6A6F4810" box="[1001,1112,341,367]" name="Australia" pageId="49" pageNumber="50">Australia</collectingCountry>
,
<collectingRegion id="065EF864FF81FFD2650FFECD6B0B4810" box="[1125,1340,341,367]" country="Australia" name="Western Australia" pageId="49" pageNumber="50">Western Australia</collectingRegion>
,
<collectingMunicipality id="2441ACFCFF81FFD26422FECD6ED148E9" pageId="49" pageNumber="50">Pilbara region</collectingMunicipality>
,
<location id="C145605DFF81FFD2619EFEE46F4048E9" LSID="urn:lsid:plazi:treatment:4C338790FF81FFD561FDFF0F6B294D2D:C145605DFF81FFD2619EFEE46F4048E9" box="[244,375,380,406]" country="Australia" latitude="-21.60389" longLatPrecision="21" longitude="118.81694" municipality="Pilbara region" name="Yule River" pageId="49" pageNumber="50" stateProvince="Western Australia">Yule River</location>
, bore GNHSLK1448B,
<date id="B0241046FF81FFD263F6FEE46DBF48E9" box="[668,904,380,406]" pageId="49" pageNumber="50" value="2003-11-18">
<collectingDate id="A060E9AEFF81FFD263F6FEE46DBF48E9" box="[668,904,380,406]" pageId="49" pageNumber="50" value="2003-11-18">18 November 2003</collectingDate>
</date>
, leg.
<collectorName id="696F5350FF81FFD262A0FEE46A7D48E9" box="[970,1098,380,406]" pageId="49" pageNumber="50">J. Cocking</collectorName>
&amp;
<collectorName id="696F5350FF81FFD26519FEE46B3648E9" box="[1139,1281,380,406]" pageId="49" pageNumber="50">M. Scanlon</collectorName>
,
<geoCoordinate id="A1AE5041FF81FFD26464FEE46BAB48E9" box="[1294,1436,379,406]" degrees="21" direction="south" minutes="36" orientation="latitude" pageId="49" pageNumber="50" precision="15" seconds="14" value="-21.60389">21°36’14”S</geoCoordinate>
<geoCoordinate id="A1AE5041FF81FFD261FDFE3A6F0348C3" box="[151,308,418,444]" degrees="118" direction="east" minutes="49" orientation="longitude" pageId="49" pageNumber="50" precision="15" seconds="01" value="118.81694">118°49’01”E</geoCoordinate>
.
</materialsCitation>
</paragraph>
</subSubSection>
<subSubSection id="8C80650DFF81FFD561AFFE506D044833" lastPageId="54" lastPageNumber="55" pageId="49" pageNumber="50" type="description">
<paragraph id="C4253686FF81FFD261AFFE506B684A67" blockId="49.[151,1437,263,2030]" pageId="49" pageNumber="50">
<emphasis id="F6EEEA94FF81FFD261AFFE506F6A489D" bold="true" box="[197,349,456,482]" pageId="49" pageNumber="50">Description.</emphasis>
FEMALE (
<typeStatus id="1B218824FF81FFD26080FE516CBA489C" box="[490,653,457,483]" pageId="49" pageNumber="50" type="holotype">HOLOTYPE</typeStatus>
). Body length, excluding appendages and caudal setae,
<quantity id="03629B63FF81FFD26477FE516BAF489C" box="[1309,1432,457,483]" metricMagnitude="-4" metricUnit="m" metricValue="4.97" pageId="49" pageNumber="50" unit="mm" value="0.497">0.497 mm</quantity>
. Preserved specimen colourless. Nauplius eye absent. Prosome (
<figureCitation id="5CA12A03FF81FFD26214FE686DDF4B75" box="[894,1000,496,522]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="49" pageNumber="50">Fig. 10A</figureCitation>
) comprising cephalothorax and three free pedigerous somites, while urosome comprising fifth pedigerous somite, completely distinct genital somite and four abdominal somites. First two urosomites (
<figureCitation id="5CA12A03FF81FFD26224FDA56D8E4B28" box="[846,953,573,599]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="49" pageNumber="50">Fig. 10B</figureCitation>
) narrower than previous and subsequent somites, which makes for unusually constricted habitus in dorsal view and distinct demarcation between prosome and urosome; prosome/urosome ratio 0.9 and greatest width at second pedigerous (first free) prosomite. Body length/width ratio about 5.1. Free pedigerous somites without pronounced lateral or dorsal expansions. Integument weakly chitinized and without cuticular windows. Rostrum (
<figureCitation id="5CA12A03FF81FFD265C9FD406B264B8D" box="[1187,1297,728,754]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="49" pageNumber="50">Fig. 10A</figureCitation>
) extremely small, membranous, not demarcated at base and ornamented with two dorsal sensilla on anterior margin.
</paragraph>
<paragraph id="C4253686FF81FFD261AFFCBD6F1A4D58" blockId="49.[151,1437,263,2030]" pageId="49" pageNumber="50">
Cephalothorax (
<figureCitation id="5CA12A03FF81FFD260E3FCBD6FC04A40" box="[393,503,805,831]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="49" pageNumber="50">Fig. 10A</figureCitation>
) with completely incorporated first pedigerous somite, quadriform in dorsal view, about as long as wide; represents 19% of total body length. Surface of cephalic shield and tergites of three free pedigerous somites ornamented only with several large sensilla. Hyaline fringe of all prosomites narrow and smooth. Fifth pedigerous (first urosomal) somite ornamented with two large dorsal sensilla and two smaller lateral sensilla on each side; hyaline fringe smooth both dorsally and laterally (
<figureCitation id="5CA12A03FF81FFD265BEFC586B754AA5" box="[1236,1346,960,986]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="49" pageNumber="50">Fig. 10A</figureCitation>
). Large sclerotized joint (
<figureCitation id="5CA12A03FF81FFD26008FC7E6FC44D7F" box="[354,499,998,1024]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="49" pageNumber="50">Figs 10A–B</figureCitation>
) present between fifth pedigerous and genital somites and visible both ventrally and dorsally.
</paragraph>
<paragraph id="C4253686FF81FFD261AFFBAC6C2A4FED" blockId="49.[151,1437,263,2030]" pageId="49" pageNumber="50">
Genital somite (
<figureCitation id="5CA12A03FF81FFD26015FBAC6FDF4D31" box="[383,488,1076,1102]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="49" pageNumber="50">Fig. 10B</figureCitation>
) approximately three times as wide as long (ventral view); ornamented only with four posterior dorsal sensilla. Hyaline fringe smooth and very narrow both ventrally and dorsally. Genital field with single small copulatory pore at about midlength, extremely short copulatory duct and two ovoid seminal receptacles, posterior part of which reaches well beyond copulatory pore, to about 2/3 of somite length. Relatively large genital aperture covered by fused reduced sixth legs, represents 46% of somite width. Third urosomite (
<figureCitation id="5CA12A03FF81FFD26075FB6D6F834C70" box="[287,436,1269,1295]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="49" pageNumber="50">Figs 10A–B</figureCitation>
) ornamented with 10 large posterior sensilla (two dorsal, four lateral (two on each side) and four ventral), two large anterior lateral sensilla (one on each side) and two lateral cuticular pores (also one on each side) at midlength; posterior margin of this somite represents widest part of urosome in ventral view; hyaline fringe smooth. Fourth urosomite with 10 large posterior sensilla (two dorsal, four lateral and four ventral), two lateral pores (one on each side) and two slightly arched, short ventrolateral rows of spinules at midlength. Preanal somite about as long as previous one, but narrower, 1.8 times as wide as long, ornamented only with two short rows of spinules similar to previous somite, but shorter and closer to each other. Anal somite (
<figureCitation id="5CA12A03FF81FFD260E0F99C6C174F61" box="[394,544,1540,1566]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="49" pageNumber="50">Figs 10A–B</figureCitation>
) ornamented with pair of large dorsal sensilla, two short ventral rows of spinules in anterior half and posterior row of spinules interrupted between caudal rami. Anal operculum unornamented, convex, not reaching to posterior end of anal somite, represents 50% of somite's width. Anal sinus smooth and widely opened.
</paragraph>
<paragraph id="C4253686FF81FFD261AFF9066DED4E91" blockId="49.[151,1437,263,2030]" pageId="49" pageNumber="50">
Caudal rami (
<figureCitation id="5CA12A03FF81FFD26001F9066C354FC7" box="[363,514,1694,1720]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="49" pageNumber="50">Figs 10A–B</figureCitation>
) short and conical, slightly shorter than their greatest width (ventral view), somewhat divergent, with space between them about one ramus width, with small diagonal chitinous ridge dorsally, armed with seven setae (three lateral, three apical and one dorsal). Ornamentation consists of two spinules each at base of dorsal and distal lateral seta, one ventral cuticular pore and posterior ventral row of seven or eight small spinules. Dorsal seta inserted almost at posterior end and close to inner margin, slender, smooth, 1.5 times as long as caudal ramus, triarticulate at its base. Proximal lateral seta arising somewhat dorsolaterally at 2/5 of ramus length, 0.8 times as long as dorsal one and 1.2 times as long as distal lateral seta, which arises at 4/5 of ramus length. Inner apical seta very slender and smooth, slightly shorter than ramus. Both principal setae sparsely pinnate at distal end, with breaking plane.
</paragraph>
<caption id="90E5660EFF82FFD161FDF83C6B1E4EA1" ID-DOI="http://doi.org/10.5281/zenodo.5313064" ID-Zenodo-Dep="5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="50" pageNumber="51" startId="50.[151,255,1956,1980]" targetBox="[205,1385,217,1884]" targetPageId="50">
<paragraph id="C4253686FF82FFD161FDF83C6B1E4EA1" blockId="50.[151,1436,1956,2014]" pageId="50" pageNumber="51">
<emphasis id="F6EEEA94FF82FFD161FDF83C6F114EC3" bold="true" box="[151,294,1956,1980]" pageId="50" pageNumber="51">FIGURE 10.</emphasis>
<taxonomicName id="039A4D05FF82FFD16047F83D6C034EC3" authority="Karanovic &amp; Hancock, 2009" authorityName="Karanovic &amp; Hancock" authorityYear="2009" box="[301,564,1957,1980]" class="Hexanauplia" family="Ameiridae" genus="Megastygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="50" pageNumber="51" phylum="Arthropoda" rank="species" species="dec" status="gen. et sp. nov.">
<emphasis id="F6EEEA94FF82FFD16047F83D6C034EC3" box="[301,564,1957,1980]" italics="true" pageId="50" pageNumber="51">Megastygonitocrella dec</emphasis>
</taxonomicName>
<emphasis id="F6EEEA94FF82FFD16351F83C6CD64EC3" bold="true" box="[571,737,1956,1980]" pageId="50" pageNumber="51">
<taxonomicNameLabel id="EDDD57EFFF82FFD16351F83C6CD64EC3" box="[571,737,1956,1980]" pageId="50" pageNumber="51" rank="species">gen. et sp. nov.</taxonomicNameLabel>
</emphasis>
, holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm.
</paragraph>
</caption>
<caption id="90E5660EFF83FFD061FDF8B46F674E8E" ID-DOI="http://doi.org/10.5281/zenodo.5313068" ID-Zenodo-Dep="5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="51" pageNumber="52" startId="51.[151,257,1836,1860]" targetBox="[234,1376,203,1798]" targetPageId="51">
<paragraph id="C4253686FF83FFD061FDF8B46F674E8E" blockId="51.[151,1436,1836,2033]" pageId="51" pageNumber="52">
<emphasis id="F6EEEA94FF83FFD061FDF8B46F1E4E3B" bold="true" box="[151,297,1836,1860]" pageId="51" pageNumber="52">FIGURE 11.</emphasis>
<taxonomicName id="039A4D05FF83FFD06058F8B56C734E3B" authority="Karanovic &amp; Hancock, 2009" authorityName="Karanovic &amp; Hancock" authorityYear="2009" box="[306,580,1837,1860]" class="Hexanauplia" family="Ameiridae" genus="Megastygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="51" pageNumber="52" phylum="Arthropoda" rank="species" species="dec" status="gen. et sp. nov.">
<emphasis id="F6EEEA94FF83FFD06058F8B56C734E3B" box="[306,580,1837,1860]" italics="true" pageId="51" pageNumber="52">Megastygonitocrella dec</emphasis>
</taxonomicName>
<emphasis id="F6EEEA94FF83FFD06326F8B46CCD4E3B" bold="true" box="[588,762,1836,1860]" pageId="51" pageNumber="52">
<taxonomicNameLabel id="EDDD57EFFF83FFD06326F8B46CCD4E3B" box="[588,762,1836,1860]" pageId="51" pageNumber="52" rank="species">gen. et sp. nov.</taxonomicNameLabel>
</emphasis>
, A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm.
</paragraph>
</caption>
<paragraph id="C4253686FF84FFD761AFFF006C2548E5" blockId="52.[151,1436,152,1830]" pageId="52" pageNumber="53">
Antennula (
<figureCitation id="5CA12A03FF84FFD76034FF006FE549CD" box="[350,466,152,178]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="52" pageNumber="53">Fig. 10C</figureCitation>
) eight-segmented, unornamented, slender, approximately twice as long as cephalothorax. Very long slender aesthetasc on fourth segment reaches beyond tip of appendage for more than length of last five segments combined and fused basally with large subapical seta; much smaller and even more slender apical aesthetasc on eighth segment fused basally to two apical setae. Setal formula: 1.8.6.3.2.2.4.7. All setae smooth and without breaking plane; only three setae on eighth segment biarticulating on basal part. Length ratio of antennular segments, from proximal to distal end and along caudal margin, 1: 1.2: 1: 0.9: 0.6: 0.7: 0.4: 0.5.
</paragraph>
<paragraph id="C4253686FF84FFD761AFFE3E6C664B89" blockId="52.[151,1436,152,1830]" pageId="52" pageNumber="53">
Antenna (
<figureCitation id="5CA12A03FF84FFD76053FE3E6F9448BF" box="[313,419,422,448]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="52" pageNumber="53">Fig. 10D</figureCitation>
) composed of coxa, basis, two-segmented endopod and one-segmented exopod. Coxa very short, unornamented. Basis about 1.4 times as long as wide, unornamented and unarmed. First endopodal segment 1.4 times as long as basis, 1.8 times as long as wide, unornamented and unarmed. Second endopodal segment longest, 1.4 times as long as first and 3.3 times as long as wide, armed laterally with two bipinnate spines flanking thin seta; apical armature consisting of five geniculate setae, longest one fused basally to additional smaller, slender and smooth seta; ornamentation consists of few spinules along anterior distal surface and two fringes on posterior surface. Exopod one-segmented, 0.6 times as long as basis and 2.3 times as long as wide, unornamented but armed with two setae; inner apical seta bipinnate, slender and 4.6 times as long as outer curved and smooth seta.
</paragraph>
<paragraph id="C4253686FF84FFD761AFFC9A6EC44AEF" blockId="52.[151,1436,152,1830]" pageId="52" pageNumber="53">
Labrum (
<figureCitation id="5CA12A03FF84FFD76059FC9A6FAC4A63" box="[307,411,770,796]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="52" pageNumber="53">Fig. 10E</figureCitation>
) not very large when compared to cephalothorax, trapezoidal, rigidly sclerotized, with relatively narrow and convex cutting edge, ornamented with one apical row of small spinules in between two subapical rows of strong spinules. Two ellipsoid fields of gustatory papillae visible on dorsal (posterior) surface.
</paragraph>
<paragraph id="C4253686FF84FFD761AFFC056D9A4AC8" blockId="52.[151,1436,152,1830]" box="[197,941,925,951]" pageId="52" pageNumber="53">Paragnaths not mounted properly to allow detailed observation.</paragraph>
<paragraph id="C4253686FF84FFD761AFFC5C6C504D07" blockId="52.[151,1436,152,1830]" pageId="52" pageNumber="53">
Mandibula (
<figureCitation id="5CA12A03FF84FFD7603FFC5C6F8C4AA1" box="[341,443,964,990]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="52" pageNumber="53">Fig. 10F</figureCitation>
) very small, with wide cutting edge on elongated coxa, armed with numerous small teeth in between three ventral coarse teeth and one dorsal unipinnate seta. Palp uniramous, comprising basis and one-segmented endopod. Basis very elongated, unarmed and unornamented, 2.8 times as long as wide and 2.5 times as long as endopod. Endopod small and unornamented, about 1.9 times as long as wide; armed apically with five slender smooth setae.
</paragraph>
<paragraph id="C4253686FF84FFD761AFFB1D6A4A4DE0" blockId="52.[151,1436,152,1830]" box="[197,1149,1157,1183]" pageId="52" pageNumber="53">
Maxillula very similar to that of
<taxonomicName id="039A4D05FF84FFD76329FB1D6D604DE1" authority="Karanovic &amp; Hancock, 2009" authorityName="Karanovic &amp; Hancock" authorityYear="2009" box="[579,855,1157,1182]" class="Hexanauplia" family="Ameiridae" genus="Gordanitocrella" kingdom="Animalia" order="Harpacticoida" pageId="52" pageNumber="53" phylum="Arthropoda" rank="species" species="trajani" status="gen. et sp.nov.">
<emphasis id="F6EEEA94FF84FFD76329FB1D6D604DE1" box="[579,855,1157,1182]" italics="true" pageId="52" pageNumber="53">Gordanitocrella trajani</emphasis>
</taxonomicName>
<emphasis id="F6EEEA94FF84FFD76234FB1D6A3A4DE0" bold="true" box="[862,1037,1157,1183]" pageId="52" pageNumber="53">
<taxonomicNameLabel id="EDDD57EFFF84FFD76234FB1D6A3A4DE0" box="[862,1037,1157,1183]" pageId="52" pageNumber="53" rank="species">gen. et sp.nov.</taxonomicNameLabel>
</emphasis>
(
<figureCitation id="5CA12A03FF84FFD76577FB1D6A474DE0" box="[1053,1136,1157,1183]" captionStart="FIGURE 5" captionStartId="23.[151,257,1934,1958]" captionTargetBox="[205,1388,197,1863]" captionTargetId="figure-53@23.[151,1436,166,1940]" captionTargetPageId="23" captionText="FIGURE 5. Gordanitocrella trajani gen. et sp. nov., holotype female: A—habitus, dorsal view; B—habitus, lateral view; C—urosome, ventral view; D—antenna; E—labrum; F—paragnaths; G—cutting edge of mandibula; H— mandibular palp; I—maxillula; J—maxilla; K—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313050" httpUri="https://zenodo.org/record/5313050/files/figure.png" pageId="52" pageNumber="53">Fig. 5I</figureCitation>
).
</paragraph>
<paragraph id="C4253686FF84FFD761AFFB346FCC4C45" blockId="52.[151,1436,152,1830]" pageId="52" pageNumber="53">
Maxilla (
<figureCitation id="5CA12A03FF84FFD7605CFB346F924DB9" box="[310,421,1196,1222]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="52" pageNumber="53">Fig. 10G</figureCitation>
) small, unornamented, with proximal endite on syncoxa absent; distal endite well developed, highly mobile, armed with one pinnate spine and two smooth subequal setae. Basis drawn out into long claw, with shorter spiniform seta at its base. Endopod represented by minute segment, armed with two smooth, subequal apical setae.
</paragraph>
<paragraph id="C4253686FF84FFD761AFFADE6CDD4CAA" blockId="52.[151,1436,152,1830]" pageId="52" pageNumber="53">
Maxilliped (
<figureCitation id="5CA12A03FF84FFD76036FADE6FFC4C1F" box="[348,459,1350,1376]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="52" pageNumber="53">Fig. 10H</figureCitation>
) with short syncoxa ornamented with few large spinules and armed with single smooth seta near inner distal corner, 1.4 times as long as wide. Basis 2.4 times as long as wide and 1.7 times as long as syncoxa, unarmed. Endopod represented by long curved claw, ornamented distally with row of spinules along concave side; with thin seta at base.
</paragraph>
<paragraph id="C4253686FF84FFD761AFFA796D624F37" blockId="52.[151,1436,152,1830]" pageId="52" pageNumber="53">
All swimming legs with three-segmented exopod; endopod of first leg three-segmented (
<figureCitation id="5CA12A03FF84FFD76476FA796BBB4C84" box="[1308,1420,1505,1531]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="52" pageNumber="53">Fig. 11B</figureCitation>
), endopod of other swimming legs one-segmented (
<figureCitation id="5CA12A03FF84FFD7626FF9906DAB4F5D" box="[773,924,1544,1570]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="52" pageNumber="53">Figs 11C–F</figureCitation>
). Armature formula of swimming legs as follows (inner/outer element; inner/terminal/outer element):
</paragraph>
<paragraph id="C4253686FF84FFD76037F9CF6DF74F11" blockId="52.[151,1436,152,1830]" box="[349,960,1623,1646]" pageId="52" pageNumber="53">Exopod Endopod</paragraph>
<paragraph id="C4253686FF84FFD761FDF9E46A684FEC" blockId="52.[151,1436,152,1830]" box="[151,1119,1660,1683]" pageId="52" pageNumber="53">Segments 1 2 3 1 2 3</paragraph>
<paragraph id="C4253686FF84FFD761FDF9066ABE4FCA" blockId="52.[151,1436,152,1830]" box="[151,1161,1694,1717]" pageId="52" pageNumber="53">First leg 0/1 0/1 0/2/2 1/0 0/0 1/1/1</paragraph>
<paragraph id="C4253686FF84FFD761FDF95B6A6C4FA5" blockId="52.[151,1436,152,1830]" box="[151,1115,1729,1755]" pageId="52" pageNumber="53">Second leg 0/1 1/1 0/2/2 0/1/0 - -</paragraph>
<paragraph id="C4253686FF84FFD761FDF9706A6C4F80" blockId="52.[151,1436,152,1830]" box="[151,1115,1766,1792]" pageId="52" pageNumber="53">Third leg 0/1 1/1 0/2/2 1/1/0 - -</paragraph>
<paragraph id="C4253686FF84FFD761FDF8956A6C4E5B" blockId="52.[151,1436,152,1830]" box="[151,1115,1804,1830]" pageId="52" pageNumber="53">Fourth leg 0/1 1/1 0(1)/2/2 0/1/0 - -</paragraph>
<paragraph id="C4253686FF84FFD661AFF8CC6D354B24" blockId="52.[151,1436,1876,2018]" lastBlockId="53.[151,1436,152,2034]" lastPageId="53" lastPageNumber="54" pageId="52" pageNumber="53">
Intercoxal sclerite of all swimming legs small, with concave distal margin and without surface ornamentation. Praecoxae and coxae of all legs unarmed and unornamented. Basis of each leg unornamented; armed with small outer spine on first and second swimming legs and smooth outer seta on third and fourth legs; first leg with stout spine on inner margin at about 3/5 of segment length. All exopodal and endopodal segments ornamented with spinules along outer margin and on outer distal corner; endopod and some exopodal segments with spinules along inner margin as well; inner distal corner of first and second exopodal segments of most legs with frilled membrane. All exopodal segments of about same length. First endopodal segment of first swimming leg (
<figureCitation id="5CA12A03FF85FFD66371FE946CB14859" box="[539,646,268,294]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="53" pageNumber="54">Fig. 11B</figureCitation>
) about three times as long as wide and reaching to 2/3 of second exopodal segment; endopod significantly longer than exopod. Endopod of second and third swimming legs about as long as first exopodal segment; that of fourth leg somewhat shorter. Apical armature element(s) on first leg geniculate, pinnate on outer (concave) side and smooth on inner side. Third exopodal segment of other legs with plumose inner apical seta and heterogeneously ornamented outer apical seta (plumose on inner margin, pinnate on outer; transitional stage between seta and spine). Apical endopodal element of second, third and fourth leg spiniform, but longer than segment; inner seta on endopod of third leg slender, plumose and about twice as long as apical element. Inner element on second exopodal segment short and spiniform, while all outer exopodal spines strong and bipinnate.
</paragraph>
<paragraph id="C4253686FF85FFD661AFFDF06F444A3C" blockId="53.[151,1436,152,2034]" pageId="53" pageNumber="54">
Fifth legs (
<figureCitation id="5CA12A03FF85FFD6602DFDF06F8F4BFD" box="[327,440,616,642]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="53" pageNumber="54">Figs 10B</figureCitation>
,
<figureCitation id="5CA12A03FF85FFD660AFFDF06FCF4BFD" box="[453,504,616,642]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="53" pageNumber="54">11G</figureCitation>
) biramous but baseoendopods fused together medially, although distinct from somite. Endopodal lobe not recognizable, forming straight smooth hyaline fringe and without armature or ornamentation. Basal outer seta slender and smooth, on long setophore. Exopod a distinct segment, ovoid, small, about as long as its maximum width, unornamented but armed with four smooth setae; length ratio of exopodal setae from inner to outer side 1: 0.36: 0.18: 0.5. Longest exopodal seta strongest, 0.7 times as long as outer basal seta.
</paragraph>
<paragraph id="C4253686FF85FFD661AFFCC86C7C4AEF" blockId="53.[151,1436,152,2034]" pageId="53" pageNumber="54">
Sixth legs (
<figureCitation id="5CA12A03FF85FFD66025FCC86F8C4A15" box="[335,443,848,874]" captionStart="FIGURE 10" captionStartId="50.[151,255,1956,1980]" captionTargetBox="[205,1385,217,1884]" captionTargetId="figure-48@50.[151,1436,194,1968]" captionTargetPageId="50" captionText="FIGURE 10. Megastygonitocrella dec gen. et sp. nov., holotype female: A—habitus, lateral view; B—urosome, ventral view; C—antennula; D—antenna; E—labrum; F—mandibula; G—maxilla; H—maxilliped. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313064" httpUri="https://zenodo.org/record/5313064/files/figure.png" pageId="53" pageNumber="54">Fig. 10B</figureCitation>
) completely fused together, forming simple operculum covering single gonopore, each armed with minute smooth seta.
</paragraph>
<paragraph id="C4253686FF85FFD661AFFC056FC04D54" blockId="53.[151,1436,152,2034]" pageId="53" pageNumber="54">
MALE (
<typeStatus id="1B218824FF85FFD66058FC056FD54AC8" box="[306,482,925,951]" pageId="53" pageNumber="54" type="allotype">ALLOTYPE</typeStatus>
). Body length, excluding caudal setae,
<quantity id="03629B63FF85FFD66290FC056AB34AC8" box="[1018,1156,925,951]" metricMagnitude="-4" metricUnit="m" metricValue="4.42" pageId="53" pageNumber="54" unit="mm" value="0.442">0.442 mm</quantity>
. Habitus (
<figureCitation id="5CA12A03FF85FFD6647AFC056BBB4AC8" box="[1296,1420,925,951]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="53" pageNumber="54">Fig. 11H</figureCitation>
), ornamentation of prosomites, rostrum, colour and nauplius eye similar to female. Hyaline fringe of all somites smooth. Body constricted at middle as in female, with fifth pedigerous somite narrower than fourth pedigerous or genital somites.
</paragraph>
<paragraph id="C4253686FF85FFD661AFFBA06C534DB9" blockId="53.[151,1436,152,2034]" pageId="53" pageNumber="54">
Genital somite twice as wide as long. Single large spermatophore (
<figureCitation id="5CA12A03FF85FFD662B0FBA06A734D2D" box="[986,1092,1080,1106]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="53" pageNumber="54">Fig. 11H</figureCitation>
) longitudinally placed inside fifth pedigerous and genital somites. Third and fourth urosomites with spinules and sensilla pattern same as in female; preanal somite without dorsal surface ornamentation as in female. Anal operculum (
<figureCitation id="5CA12A03FF85FFD66580FB1D6B614DE0" box="[1258,1366,1157,1183]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="53" pageNumber="54">Fig. 11H</figureCitation>
) with posterior row of many minute spinules.
</paragraph>
<paragraph id="C4253686FF85FFD661AFFB4B6ED94C6C" blockId="53.[151,1436,152,2034]" pageId="53" pageNumber="54">
Caudal rami (
<figureCitation id="5CA12A03FF85FFD6600FFB4B6FF94D92" box="[357,462,1235,1261]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="53" pageNumber="54">Fig. 11H</figureCitation>
) slightly shorter and not divergent, but armature and ornamentation very similar to female.
</paragraph>
<paragraph id="C4253686FF85FFD661AFFAB86CA44F5D" blockId="53.[151,1436,152,2034]" pageId="53" pageNumber="54">
Antennula (
<figureCitation id="5CA12A03FF85FFD66032FAB86F8B4C45" box="[344,444,1312,1338]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="53" pageNumber="54">Fig. 11I</figureCitation>
) unornamented, long and slender, ten-segmented, not strongly geniculate, with geniculation between seventh and eighth segments. Long aesthetasc on apical acrothek of fifth segment homologous to aesthetasc on fourth segment in female. Smaller aesthetasc on tenth segment fused basally to two apical setae. Armature of first, ninth and tenth segments similar to female. Setal formula: 1.10.6.1.7.1.2.1.4.7. Majority of setae smooth and slender; two setae on fifth segment, one on sixth and one on seventh very short, spiniform and unipinnate. Outer (caudal) setae on ninth and tenth segments biarticulating on basal part; no setae with breaking plane.
</paragraph>
<paragraph id="C4253686FF85FFD661AFF9B66D214F10" blockId="53.[151,1436,152,2034]" pageId="53" pageNumber="54">
Antenna (
<figureCitation id="5CA12A03FF85FFD66050F9B66FAB4F37" box="[314,412,1582,1608]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="53" pageNumber="54">Fig. 11J</figureCitation>
), labrum, mandibula, maxillula, maxilla, maxilliped, second swimming leg (
<figureCitation id="5CA12A03FF85FFD66441F9B66BA44F37" box="[1323,1427,1582,1608]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="53" pageNumber="54">Fig. 11L</figureCitation>
) and fourth swimming leg (
<figureCitation id="5CA12A03FF85FFD660A4F9CD6C0F4F10" box="[462,568,1621,1647]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="53" pageNumber="54">Fig. 11N</figureCitation>
) similar to female.
</paragraph>
<paragraph id="C4253686FF85FFD661AFF9E46ACD4FC2" blockId="53.[151,1436,152,2034]" pageId="53" pageNumber="54">
Basis of first swimming leg (
<figureCitation id="5CA12A03FF85FFD66354F9E46C864FE9" box="[574,689,1660,1686]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="53" pageNumber="54">Fig. 11K</figureCitation>
) with inner spine modified, smooth, inflated and apically transformed into a complex tridimensional structure, similar to twisted but widely open pincers.
</paragraph>
<paragraph id="C4253686FF85FFD661AFF9516ED94E75" blockId="53.[151,1436,152,2034]" pageId="53" pageNumber="54">
Endopod of third swimming leg (
<figureCitation id="5CA12A03FF85FFD6633DF9516CFF4F9C" box="[599,712,1737,1763]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="53" pageNumber="54">Fig. 11M</figureCitation>
) with inner seta unipinnate and significantly shorter than in female.
</paragraph>
<paragraph id="C4253686FF85FFD661AFF88E6C554E01" blockId="53.[151,1436,152,2034]" pageId="53" pageNumber="54">
Fifth legs (
<figureCitation id="5CA12A03FF85FFD66023F88E6FEC4E4F" box="[329,475,1814,1840]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="53" pageNumber="54">Figs 11O–P</figureCitation>
) similar to female, except exopod additionally armed with innermost bipinnate seta; second innermost seta (homologous to innermost seta on female exopod) also proportionally shorter. Outer basal seta shorter than in female.
</paragraph>
<paragraph id="C4253686FF85FFD661AFF8136D414EB4" blockId="53.[151,1436,152,2034]" pageId="53" pageNumber="54">
Sixth legs (
<figureCitation id="5CA12A03FF85FFD66024F8136F8C4EDA" box="[334,443,1931,1957]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="53" pageNumber="54">Fig. 11Q</figureCitation>
) narrowly fused basally together and indistinct from somite, each armed with two slender smooth setae; outer seta 1.8 times as long as inner one.
</paragraph>
<paragraph id="C4253686FF85FFD561AFF84F6D044833" blockId="53.[151,1436,152,2034]" lastBlockId="54.[151,1436,152,1106]" lastPageId="54" lastPageNumber="55" pageId="53" pageNumber="54">
<emphasis id="F6EEEA94FF85FFD661AFF84F6F664E8E" bold="true" box="[197,337,2007,2033]" pageId="53" pageNumber="54">Variability.</emphasis>
Body length of females ranges from
<quantity id="03629B63FF85FFD6626AF8406D414E8D" box="[768,886,2008,2034]" metricMagnitude="-4" metricUnit="m" metricValue="4.87" pageId="53" pageNumber="54" unit="mm" value="0.487">0.487 mm</quantity>
to
<quantity id="03629B63FF85FFD662F1F8406A274E8D" box="[923,1040,2008,2034]" metricMagnitude="-4" metricUnit="m" metricValue="4.97" pageId="53" pageNumber="54" unit="mm" value="0.497">0.497 mm</quantity>
(
<quantity id="03629B63FF85FFD6654AF8406AA04E8D" box="[1056,1175,2008,2034]" metricMagnitude="-4" metricUnit="m" metricValue="4.92" pageId="53" pageNumber="54" unit="mm" value="0.492">0.492 mm</quantity>
average; n = 4), while only
<specimenCount id="D29CFD0FFF86FFD561B9FF006F7D49CD" box="[211,330,152,178]" pageId="54" pageNumber="55" type="male">two males</specimenCount>
were collected and studied (0. 442 and
<quantity id="03629B63FF86FFD56275FF006DA149CD" box="[799,918,152,178]" metricMagnitude="-4" metricUnit="m" metricValue="4.45" pageId="54" pageNumber="55" unit="mm" value="0.445">0.445 mm</quantity>
long). Both males exhibit asymmetry in the length of the innermost spiniform seta on the fifth leg exopod (
<figureCitation id="5CA12A03FF86FFD562E8FF266A2449A7" box="[898,1043,190,216]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="54" pageNumber="55">Figs 11O–P</figureCitation>
). All males and females have the third exopodal segment of the fourth swimming leg with an inner seta present on one leg but absent on the opposite one (
<figureCitation id="5CA12A03FF86FFD5602DFE946FD54859" box="[327,482,268,294]" captionStart="FIGURE 11" captionStartId="51.[151,257,1836,1860]" captionTargetBox="[234,1376,203,1798]" captionTargetId="figure-103@51.[180,1414,170,1873]" captionTargetPageId="51" captionText="FIGURE 11. Megastygonitocrella dec gen. et sp. nov., A–G, holotype female; H–Q, allotype male: A—left caudal ramus, lateral view; B—first swimming leg; C—endopod of second swimming leg; D—third swimming leg; E—third exopodal segment of right fourth leg; F—left fourth swimming leg; G—right fifth leg; H—habitus, dorsal view; I— antennula; J—exopod of antenna; K—basis of first swimming leg; L—endopod of second swimming leg; M—endopod of third swimming leg; N—endopod of fourth swimming leg; O—right fifth leg; P—left fifth leg; Q—left sixth leg. Scales = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5313068" httpUri="https://zenodo.org/record/5313068/files/figure.png" pageId="54" pageNumber="55">Figs 11D–E</figureCitation>
). It is interesting that all females have a smooth anal operculum, while both examined males have a posterior row of minute spinules.
</paragraph>
</subSubSection>
<subSubSection id="8C80650DFF86FFD561AFFEC06C474898" pageId="54" pageNumber="55" type="etymology">
<paragraph id="C4253686FF86FFD561AFFEC06C474898" blockId="54.[151,1436,152,1106]" pageId="54" pageNumber="55">
<emphasis id="F6EEEA94FF86FFD561AFFEC06F6E480D" bold="true" box="[197,345,344,370]" pageId="54" pageNumber="55">Etymology.</emphasis>
The specific name is dedicated to the Western Australian Government Department of Environment and Conservation (DEC), who collected the material and partly funded the preparation of this paper. It comprises an arbitrary combination of letters that can be treated as a Latin word and that should be conceived as a noun of feminine gender.
</paragraph>
</subSubSection>
<subSubSection id="8C80650DFF86FFD561AFFE6B6B294D2D" pageId="54" pageNumber="55" type="discussion">
<paragraph id="C4253686FF86FFD561AFFE6B6B294D2D" blockId="54.[151,1436,152,1106]" pageId="54" pageNumber="55">
<emphasis id="F6EEEA94FF86FFD561AFFE6B6F754B72" bold="true" box="[197,322,499,525]" pageId="54" pageNumber="55">Remarks.</emphasis>
The one-segmented endopod of the second to fourth swimming legs, armed only with the ancestral outer subapical spine on the second and fourth legs and additionally with an outer apical seta on the third (formula 1.2.1), leave no doubt that this species belongs to the genus
<taxonomicName id="039A4D05FF86FFD5657BFDD96B344B25" authority="Karanovic &amp; Hancock, 2009" authorityName="Karanovic &amp; Hancock" authorityYear="2009" box="[1041,1283,577,602]" class="Hexanauplia" family="Ameiridae" genus="Megastygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="genus" status="gen. nov.">
<emphasis id="F6EEEA94FF86FFD5657BFDD96B344B25" box="[1041,1283,577,602]" italics="true" pageId="54" pageNumber="55">Megastygonitocrella</emphasis>
</taxonomicName>
<emphasis id="F6EEEA94FF86FFD56466FDD86B4C4B25" bold="true" box="[1292,1403,576,602]" pageId="54" pageNumber="55">
<taxonomicNameLabel id="EDDD57EFFF86FFD56466FDD86B4C4B25" box="[1292,1403,576,602]" pageId="54" pageNumber="55" rank="genus">gen. nov.</taxonomicNameLabel>
</emphasis>
In fact,
<taxonomicName id="039A4D05FF86FFD561B9FDF06F124BFE" authority="Karanovic &amp; Hancock, 2009" authorityName="Karanovic &amp; Hancock" authorityYear="2009" box="[211,293,616,641]" class="Hexanauplia" family="Ameiridae" genus="Megastygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="species" species="dec" status="sp. nov.">
<emphasis id="F6EEEA94FF86FFD561B9FDF06F124BFE" box="[211,293,616,641]" italics="true" pageId="54" pageNumber="55">M. dec</emphasis>
</taxonomicName>
<emphasis id="F6EEEA94FF86FFD56047FDFF6FBB4BFE" bold="true" box="[301,396,615,641]" pageId="54" pageNumber="55">
<taxonomicNameLabel id="EDDD57EFFF86FFD56047FDFF6FBB4BFE" box="[301,396,615,641]" pageId="54" pageNumber="55" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
has the same segmentation and almost the same armature formula (the only difference being the number of inner elements on the third exopodal segment of the fourth leg) as the Caucasian
<taxonomicName id="039A4D05FF86FFD56416FD176FCE4BB0" authority="(Borutzky, 1967)" authorityName="Karanovic &amp; Hancock" authorityYear="2009" baseAuthorityName="Borutzky" baseAuthorityYear="1967" class="Hexanauplia" family="Ameiridae" genus="Nitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="species" species="ljovuschkini" status="comb. nov.">
<emphasis id="F6EEEA94FF86FFD56416FD176F114BB1" italics="true" pageId="54" pageNumber="55">M. ljovuschkini</emphasis>
(
<bibRefCitation id="A00B4B77FF86FFD5605CFD2D6FC64BB0" author="Borutzky, E. V." box="[310,497,693,719]" pageId="54" pageNumber="55" pagination="32 - 39" refId="ref55876" refString="Borutzky, E. V. (1967) Biospeologica Sovietica 32, On the genus Nitocrella Chappuis (Copepoda, Harpacticoida). Byulleten Moskovskogo Obschestva Ispytatelei Prirody (nov. ser.), 72, 32 - 39. [in Russian]" type="journal article" year="1967">Borutzky, 1967</bibRefCitation>
)
</taxonomicName>
<taxonomicNameLabel id="EDDD57EFFF86FFD56368FD2D6CB24BB0" box="[514,645,693,719]" pageId="54" pageNumber="55" rank="species">comb. nov.</taxonomicNameLabel>
and six other Australian representatives:
<taxonomicName id="039A4D05FF86FFD5651CFD2D6B334BB1" authority="Karanovic &amp; Hancock, 2009" authorityName="Karanovic &amp; Hancock" authorityYear="2009" box="[1142,1284,693,718]" class="Hexanauplia" family="Ameiridae" genus="Megastygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="species" species="ecowisei" status="sp. nov.">
<emphasis id="F6EEEA94FF86FFD5651CFD2D6B334BB1" box="[1142,1284,693,718]" italics="true" pageId="54" pageNumber="55">M. ecowisei</emphasis>
</taxonomicName>
<emphasis id="F6EEEA94FF86FFD56467FD2D6B5B4BB0" bold="true" box="[1293,1388,693,719]" pageId="54" pageNumber="55">
<taxonomicNameLabel id="EDDD57EFFF86FFD56467FD2D6B5B4BB0" box="[1293,1388,693,719]" pageId="54" pageNumber="55" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
,
<taxonomicName id="039A4D05FF86FFD56416FD2D6F004B8A" authority="Karanovic &amp; Hancock, 2009" authorityName="Karanovic &amp; Hancock" authorityYear="2009" class="Hexanauplia" family="Ameiridae" genus="Megastygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="species" species="pagusregalis" status="sp. nov.">
<emphasis id="F6EEEA94FF86FFD56416FD2D6F004B8A" italics="true" pageId="54" pageNumber="55">M. pagusregalis</emphasis>
</taxonomicName>
<emphasis id="F6EEEA94FF86FFD5602BFD436F924B8A" bold="true" box="[321,421,731,757]" pageId="54" pageNumber="55">
<taxonomicNameLabel id="EDDD57EFFF86FFD5602BFD436F924B8A" box="[321,421,731,757]" pageId="54" pageNumber="55" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
,
<taxonomicName id="039A4D05FF86FFD560DDFD446C0A4B8A" authority="Karanovic &amp; Hancock, 2009" authorityName="Karanovic &amp; Hancock" authorityYear="2009" box="[439,573,732,757]" class="Hexanauplia" family="Ameiridae" genus="Megastygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="species" species="kryptos" status="sp. nov.">
<emphasis id="F6EEEA94FF86FFD560DDFD446C0A4B8A" box="[439,573,732,757]" italics="true" pageId="54" pageNumber="55">M. kryptos</emphasis>
</taxonomicName>
<emphasis id="F6EEEA94FF86FFD5632DFD436C9C4B8A" bold="true" box="[583,683,731,757]" pageId="54" pageNumber="55">
<taxonomicNameLabel id="EDDD57EFFF86FFD5632DFD436C9C4B8A" box="[583,683,731,757]" pageId="54" pageNumber="55" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
,
<taxonomicName id="039A4D05FF86FFD563D7FD446A634B89" authority="(Karanovic, 2006)" authorityName="Karanovic &amp; Hancock" authorityYear="2009" baseAuthorityName="Karanovic" baseAuthorityYear="2006" box="[701,1108,732,758]" class="Hexanauplia" family="Ameiridae" genus="Stygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="species" species="trispinosa" status="comb. nov.">
<emphasis id="F6EEEA94FF86FFD563D7FD446D524B8A" box="[701,869,732,757]" italics="true" pageId="54" pageNumber="55">M. trispinosa</emphasis>
(
<bibRefCitation id="A00B4B77FF86FFD5621DFD446A7C4B89" author="Karanovic, T." box="[887,1099,732,758]" pageId="54" pageNumber="55" pagination="1 - 239" refId="ref57102" refString="Karanovic, T. (2006) Subterranean copepods (Crustacea, Copepoda) from the Pilbara region in Western Australia. Records of the Western Australian Museum, Supplement 70, 1 - 239." type="journal article" year="2006">Karanovic, 2006</bibRefCitation>
)
</taxonomicName>
<taxonomicNameLabel id="EDDD57EFFF86FFD56534FD446ADC4B89" box="[1118,1259,732,758]" pageId="54" pageNumber="55" rank="species">comb. nov.</taxonomicNameLabel>
,
<taxonomicName id="039A4D05FF86FFD56590FD446F4A4A63" authority="(Karanovic, 2006)" authorityName="Karanovic &amp; Hancock" authorityYear="2009" baseAuthorityName="Karanovic" baseAuthorityYear="2006" class="Hexanauplia" family="Ameiridae" genus="Stygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="species" species="bispinosa" status="comb. nov.">
<emphasis id="F6EEEA94FF86FFD56590FD446BAC4B8A" box="[1274,1435,732,757]" italics="true" pageId="54" pageNumber="55">M. bispinosa</emphasis>
(
<bibRefCitation id="A00B4B77FF86FFD561F5FC9A6F414A63" author="Karanovic, T." box="[159,374,770,796]" pageId="54" pageNumber="55" pagination="1 - 239" refId="ref57102" refString="Karanovic, T. (2006) Subterranean copepods (Crustacea, Copepoda) from the Pilbara region in Western Australia. Records of the Western Australian Museum, Supplement 70, 1 - 239." type="journal article" year="2006">Karanovic, 2006</bibRefCitation>
)
</taxonomicName>
<taxonomicNameLabel id="EDDD57EFFF86FFD560E2FC9A6C244A63" box="[392,531,770,796]" pageId="54" pageNumber="55" rank="species">comb. nov.</taxonomicNameLabel>
and
<taxonomicName id="039A4D05FF86FFD56339FC9A6DC04A63" authority="(Karanovic, 2006)" authorityName="Karanovic &amp; Hancock" authorityYear="2009" baseAuthorityName="Karanovic" baseAuthorityYear="2006" box="[595,1015,770,796]" class="Hexanauplia" family="Ameiridae" genus="Stygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="species" species="unispinosa" status="comb. nov.">
<emphasis id="F6EEEA94FF86FFD56339FC9A6D314A64" box="[595,774,770,795]" italics="true" pageId="54" pageNumber="55">M. unispinosa</emphasis>
(
<bibRefCitation id="A00B4B77FF86FFD56273FC9A6DD84A63" author="Karanovic, T." box="[793,1007,770,796]" pageId="54" pageNumber="55" pagination="1 - 239" refId="ref57102" refString="Karanovic, T. (2006) Subterranean copepods (Crustacea, Copepoda) from the Pilbara region in Western Australia. Records of the Western Australian Museum, Supplement 70, 1 - 239." type="journal article" year="2006">Karanovic, 2006</bibRefCitation>
)
</taxonomicName>
<taxonomicNameLabel id="EDDD57EFFF86FFD5656BFC9A6ABB4A63" box="[1025,1164,770,796]" pageId="54" pageNumber="55" rank="species">comb. nov.</taxonomicNameLabel>
However, it is easily distinguished from all these congeners by a constricted habitus, reduced armature of the antennal exopod, very long mandibular basis, completely free genital somite in the female and the unusually robust inner basal spine on the first swimming leg in the male.
<taxonomicName id="039A4D05FF86FFD563CBFCEF6DF54AEF" authorityName="Karanovic &amp; Hancock" authorityYear="2009" box="[673,962,887,912]" class="Hexanauplia" family="Ameiridae" genus="Megastygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="species" species="dec">
<emphasis id="F6EEEA94FF86FFD563CBFCEF6DF54AEF" box="[673,962,887,912]" italics="true" pageId="54" pageNumber="55">Megastygonitocrella dec</emphasis>
</taxonomicName>
can be easily distinguished further from
<emphasis id="F6EEEA94FF86FFD561FDFC056C444AC9" box="[151,627,925,950]" italics="true" pageId="54" pageNumber="55">
<taxonomicName id="039A4D05FF86FFD561FDFC056F124AC9" authorityName="Karanovic &amp; Hancock" authorityYear="2009" box="[151,293,925,950]" class="Hexanauplia" family="Ameiridae" genus="Megastygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="species" species="ecowisei">M. ecowisei</taxonomicName>
,
<taxonomicName id="039A4D05FF86FFD5605BFC056FE74AC9" authorityName="Karanovic &amp; Hancock" authorityYear="2009" baseAuthorityName="Karanovic" baseAuthorityYear="2006" box="[305,464,925,950]" class="Hexanauplia" family="Ameiridae" genus="Stygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="species" species="trispinosa">M. trispinosa</taxonomicName>
,
<taxonomicName id="039A4D05FF86FFD560B6FC056C444AC9" authorityName="Karanovic &amp; Hancock" authorityYear="2009" baseAuthorityName="Karanovic" baseAuthorityYear="2006" box="[476,627,925,950]" class="Hexanauplia" family="Ameiridae" genus="Stygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="species" species="bispinosa">M. bispinosa</taxonomicName>
</emphasis>
and
<taxonomicName id="039A4D05FF86FFD563C6FC056D644AC9" authorityName="Karanovic &amp; Hancock" authorityYear="2009" baseAuthorityName="Karanovic" baseAuthorityYear="2006" box="[684,851,925,950]" class="Hexanauplia" family="Ameiridae" genus="Stygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="species" species="unispinosa">
<emphasis id="F6EEEA94FF86FFD563C6FC056D644AC9" box="[684,851,925,950]" italics="true" pageId="54" pageNumber="55">M. unispinosa</emphasis>
</taxonomicName>
by its unarmed fifth leg endopodal lobe. It differs additionally from
<taxonomicName id="039A4D05FF86FFD56013FC5C6C744AA2" authorityName="Karanovic &amp; Hancock" authorityYear="2009" box="[377,579,964,989]" class="Hexanauplia" family="Ameiridae" genus="Megastygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="species" species="pagusregalis">
<emphasis id="F6EEEA94FF86FFD56013FC5C6C744AA2" box="[377,579,964,989]" italics="true" pageId="54" pageNumber="55">M. pagusregalis</emphasis>
</taxonomicName>
by having the fifth leg free (completely fused to somite in the latter species), a much more elongated antennula (very short in
<taxonomicName id="039A4D05FF86FFD56256FC726DCE4D7C" authorityName="Karanovic &amp; Hancock" authorityYear="2009" box="[828,1017,1002,1027]" class="Hexanauplia" family="Ameiridae" genus="Megastygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="species" species="pagusregalis">
<emphasis id="F6EEEA94FF86FFD56256FC726DCE4D7C" box="[828,1017,1002,1027]" italics="true" pageId="54" pageNumber="55">M. pagusregalis</emphasis>
</taxonomicName>
) and different ornamentation of the urosomites. Finally,
<taxonomicName id="039A4D05FF86FFD560ECFB896FE14D55" authorityName="Karanovic &amp; Hancock" authorityYear="2009" box="[390,470,1041,1066]" class="Hexanauplia" family="Ameiridae" genus="Megastygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="species" species="dec">
<emphasis id="F6EEEA94FF86FFD560ECFB896FE14D55" box="[390,470,1041,1066]" italics="true" pageId="54" pageNumber="55">M. dec</emphasis>
</taxonomicName>
can be additionally distinguished from
<taxonomicName id="039A4D05FF86FFD562C3FB896A114D55" authorityName="Karanovic &amp; Hancock" authorityYear="2009" box="[937,1062,1041,1066]" class="Hexanauplia" family="Ameiridae" genus="Megastygonitocrella" kingdom="Animalia" order="Harpacticoida" pageId="54" pageNumber="55" phylum="Arthropoda" rank="species" species="kryptos">
<emphasis id="F6EEEA94FF86FFD562C3FB896A114D55" box="[937,1062,1041,1066]" italics="true" pageId="54" pageNumber="55">M. kryptos</emphasis>
</taxonomicName>
by the shape of its caudal rami, ornamentation of the anal operculum and the number of armature elements on the fifth leg exopod.
</paragraph>
</subSubSection>
</treatment>
</document>
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