324 lines
31 KiB
XML
324 lines
31 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/zookeys.944.49361" ID-GBIF-Dataset="32c9c6da-ffc8-4d44-bbb2-6de489ade3da" ID-PMC="PMC7340627" ID-Pensoft-Pub="1313-2970-944-1" ID-Pensoft-UUID="2582F64B32F25E7EA65FEFF8357DA97F" ID-PubMed="32684771" ID-ZooBank="48DC6479DFA3433F98B5D79097B3AA32" ModsDocID="1313-2970-944-1" checkinTime="1593557011427" checkinUser="pensoft" docAuthor="Moon, Seong Yong, Soh, Ho Young & Cho, Dae Hyun" docDate="2020" docId="069DFB130DFC515E8972A1767130E483" docLanguage="en" docName="ZooKeys 944: 1-30" docOrigin="ZooKeys 944" docSource="http://dx.doi.org/10.3897/zookeys.944.49361" docTitle="Stephos concavus Moon & Soh & Cho 2020, sp. nov." docType="treatment" docUuid="812ECEFE-53ED-4675-90C9-D631F3D40F0C" docUuidSource="ZooBank" docVersion="4" id="2582F64B32F25E7EA65FEFF8357DA97F" lastPageNumber="1" masterDocId="2582F64B32F25E7EA65FEFF8357DA97F" masterDocTitle="Three new species of the genus Stephos Scott, 1892 (Crustacea, Copepoda, Calanoida, Stephidae) from Jeju Island, Korea" masterLastPageNumber="30" masterPageNumber="1" pageNumber="1" updateTime="1668169026865" updateUser="ExternalLinkService">
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<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:titleInfo>
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<mods:title>Three new species of the genus Stephos Scott, 1892 (Crustacea, Copepoda, Calanoida, Stephidae) from Jeju Island, Korea</mods:title>
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</mods:titleInfo>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Moon, Seong Yong</mods:namePart>
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<mods:affiliation>South Sea Fisheries Research Institute, National Institute of Fisheries Science, Yeosu 59780, South Korea</mods:affiliation>
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<mods:nameIdentifier type="email">msy7744@korea.kr</mods:nameIdentifier>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Soh, Ho Young</mods:namePart>
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<mods:affiliation>Department of Environmental Oceanography, Chonnam National University, Yeosu 596166, South Korea</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Cho, Dae Hyun</mods:namePart>
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<mods:affiliation>Department of Oceanography, Chonnam National University, Gwangju 61186, South Korea</mods:affiliation>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:relatedItem type="host">
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<mods:titleInfo>
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<mods:title>ZooKeys</mods:title>
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</mods:titleInfo>
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<mods:part>
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<mods:date>2020</mods:date>
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<mods:detail type="volume">
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<mods:number>944</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>1</mods:start>
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<mods:end>30</mods:end>
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</mods:extent>
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</mods:part>
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</mods:relatedItem>
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<mods:location>
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<mods:url>http://dx.doi.org/10.3897/zookeys.944.49361</mods:url>
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</mods:location>
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<mods:classification>journal article</mods:classification>
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<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.944.49361</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-944-1</mods:identifier>
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<mods:identifier type="ZooBank">48DC6479DFA3433F98B5D79097B3AA32</mods:identifier>
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<mods:identifier type="Pensoft-UUID">2582F64B32F25E7EA65FEFF8357DA97F</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="164844908" LSID="urn:lsid:zoobank.org:act:812ECEFE-53ED-4675-90C9-D631F3D40F0C" httpUri="http://treatment.plazi.org/id/069DFB130DFC515E8972A1767130E483" lastPageNumber="1" pageId="0" pageNumber="1">
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<subSubSection pageId="0" pageNumber="1" type="nomenclature">
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<paragraph pageId="0" pageNumber="1">
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<taxonomicName LSID="069DFB13-0DFC-515E-8972-A1767130E483" authority="Moon & Soh & Cho, 2020" authorityName="Moon & Soh & Cho" authorityYear="2020" class="Hexanauplia" family="Stephidae" genus="Stephos" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stephos concavus" order="Calanoida" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="concavus" status="sp. nov.">Stephos concavus</taxonomicName>
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<taxonomicNameLabel pageId="0" pageNumber="1">sp. nov.</taxonomicNameLabel>
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<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Stephos concavus sp. nov. Female holotype A habitus, dorsal view B habitus, lateral view C urosome, dorsal view D urosome, lateral view E genital double-somite, ventral F leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure6" httpUri="https://binary.pensoft.net/fig/426097" pageId="0" pageNumber="1">Figures 6</figureCitation>
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<figureCitation captionStart="Figure 7" captionStartId="F7" captionText="Figure 7. Stephos concavus sp. nov. Female holotype A antennule B antenna C mandible. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure7" httpUri="https://binary.pensoft.net/fig/426098" pageId="0" pageNumber="1">, 7</figureCitation>
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<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Stephos concavus sp. nov. Female holotype A maxillule B maxilla C maxilliped D leg 1 E leg 2 F leg 3 G leg 4. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure8" httpUri="https://binary.pensoft.net/fig/426099" pageId="0" pageNumber="1">, 8</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="materials_examined">
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<paragraph pageId="0" pageNumber="1">Material examined.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Holotype</emphasis>
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♀ (NIBRIV0000293109) dissected on two glass slides collected by D. H. Cho, 9 May 2012.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="type locality">
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<paragraph pageId="0" pageNumber="1">Type locality.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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Near the bottom (ca. 4 m depth), Wimi port, Jeju Island (approximately
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<geoCoordinate degrees="33" direction="north" minutes="16" orientation="latitude" precision="15" seconds="13" value="33.27028">33°16'13"N</geoCoordinate>
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,
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<geoCoordinate degrees="126" direction="east" minutes="39" orientation="longitude" precision="15" seconds="43" value="126.66195">126°39'43"E</geoCoordinate>
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), Korea.
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</paragraph>
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<caption doi="10.3897/zookeys.944.49361.figure6" httpUri="https://binary.pensoft.net/fig/426097" pageId="0" pageNumber="1" start="Figure 6" startId="F6">
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" pageId="0" pageNumber="1">Figure 6.</emphasis>
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<taxonomicName authorityName="Moon & Soh & Cho" authorityYear="2020" class="Hexanauplia" family="Stephidae" genus="Stephos" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stephos concavus" order="Calanoida" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="concavus">
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<emphasis italics="true" pageId="0" pageNumber="1">Stephos concavus</emphasis>
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</taxonomicName>
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sp. nov. Female holotype
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<emphasis bold="true" pageId="0" pageNumber="1">A</emphasis>
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habitus, dorsal view
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<emphasis bold="true" pageId="0" pageNumber="1">B</emphasis>
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habitus, lateral view
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<emphasis bold="true" pageId="0" pageNumber="1">C</emphasis>
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urosome, dorsal view
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<emphasis bold="true" pageId="0" pageNumber="1">D</emphasis>
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urosome, lateral view
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<emphasis bold="true" pageId="0" pageNumber="1">E</emphasis>
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genital double-somite, ventral
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<emphasis bold="true" pageId="0" pageNumber="1">F</emphasis>
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leg 5. Scale bars in
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<normalizedToken originalValue="µm">µm</normalizedToken>
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.
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="description">
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<paragraph pageId="0" pageNumber="1">Description of female.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Body</emphasis>
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(Fig.
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<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Stephos concavus sp. nov. Female holotype A habitus, dorsal view B habitus, lateral view C urosome, dorsal view D urosome, lateral view E genital double-somite, ventral F leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure6" httpUri="https://binary.pensoft.net/fig/426097" pageId="0" pageNumber="1">6A, B</figureCitation>
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) robust, length 0.93 mm. Prosome 5-segmented; cephalosome and first pedigerous somites completely separated; fourth and fifth pedigerous somites incompletely fused (Fig.
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<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Stephos concavus sp. nov. Female holotype A habitus, dorsal view B habitus, lateral view C urosome, dorsal view D urosome, lateral view E genital double-somite, ventral F leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure6" httpUri="https://binary.pensoft.net/fig/426097" pageId="0" pageNumber="1">6A</figureCitation>
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), posterior corners of prosome slightly asymmetric. Rostrum represented by a rounded knob. Prosome-urosome ratio 2.25:1. Urosome 4-segmented, comprising genital double-somite, two free abdominal somites, and anal somite; length ratio of genital double-somite, first free abdominal somite, second free abdominal somite, and anal somite as 43.0: 18.9:18.1:9.4:10.7 = 100. Genital double-somite (Fig.
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<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Stephos concavus sp. nov. Female holotype A habitus, dorsal view B habitus, lateral view C urosome, dorsal view D urosome, lateral view E genital double-somite, ventral F leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure6" httpUri="https://binary.pensoft.net/fig/426097" pageId="0" pageNumber="1">6C-E</figureCitation>
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) slightly asymmetric, with protruding lobe on the anterior to medial part of both sides and with a row of spinules in lateral view (Fig.
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<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Stephos concavus sp. nov. Female holotype A habitus, dorsal view B habitus, lateral view C urosome, dorsal view D urosome, lateral view E genital double-somite, ventral F leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure6" httpUri="https://binary.pensoft.net/fig/426097" pageId="0" pageNumber="1">6C, D</figureCitation>
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); common operculum located ventromedially slightly round (Fig.
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<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Stephos concavus sp. nov. Female holotype A habitus, dorsal view B habitus, lateral view C urosome, dorsal view D urosome, lateral view E genital double-somite, ventral F leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure6" httpUri="https://binary.pensoft.net/fig/426097" pageId="0" pageNumber="1">6E</figureCitation>
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) and with spermatophore and coupler in dorsal view (Fig.
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<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Stephos concavus sp. nov. Female holotype A habitus, dorsal view B habitus, lateral view C urosome, dorsal view D urosome, lateral view E genital double-somite, ventral F leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure6" httpUri="https://binary.pensoft.net/fig/426097" pageId="0" pageNumber="1">6C</figureCitation>
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). First and second abdominal somites (Fig.
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<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Stephos concavus sp. nov. Female holotype A habitus, dorsal view B habitus, lateral view C urosome, dorsal view D urosome, lateral view E genital double-somite, ventral F leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure6" httpUri="https://binary.pensoft.net/fig/426097" pageId="0" pageNumber="1">6C</figureCitation>
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), with transverse hyaline frill dorsally and ventrally. Anal somite shortest. Caudal rami with six setae, symmetric, 1.75 times longer than wide (49
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<normalizedToken originalValue="×">x</normalizedToken>
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28
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<normalizedToken originalValue="μm">μm</normalizedToken>
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); caudal setae II-VII present (seta I lacking); seta II spiniform, seta III ca. half the length of seta V, seta V longer (right longer than left) than seta IV, both plumose; dorsal seta VII short, plumose.
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</paragraph>
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Antennule</emphasis>
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(Fig.
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<figureCitation captionStart="Figure 7" captionStartId="F7" captionText="Figure 7. Stephos concavus sp. nov. Female holotype A antennule B antenna C mandible. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure7" httpUri="https://binary.pensoft.net/fig/426098" pageId="0" pageNumber="1">7A</figureCitation>
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) symmetric, extending beyond distal area of genital double-somite; 24-segmented, apparently ancestral, segments I-II, III-IV, X-XI, and XXVII-XXVIII are fused. Segmentation and setation pattern as follows (ancestral segment number-setae+aesthetasc): I-II-3+2ae, III-IV-4+3ae, V-2+ae, VI-2, VII-2+ae, VIII2+ae, IX-2, X-XI-4+ae, XII-1, XIII-1, XIV-2+ae, XV-1, XVI-2+ae, XVII-1, XVIII-1, XIX-1, XX-1, XXI-2+ae, XXII-1, XXIII-1+ae, XXIV-1+1+ae, XXV-1+1, XXVI-1+1, XXVII-XXVIII-5+ae. Ancestral segments I-XIV and XVI-XXV with row of spinules on posterior surface.
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</paragraph>
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<caption doi="10.3897/zookeys.944.49361.figure7" httpUri="https://binary.pensoft.net/fig/426098" pageId="0" pageNumber="1" start="Figure 7" startId="F7">
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" pageId="0" pageNumber="1">Figure 7.</emphasis>
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<taxonomicName authorityName="Moon & Soh & Cho" authorityYear="2020" class="Hexanauplia" family="Stephidae" genus="Stephos" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stephos concavus" order="Calanoida" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="concavus">
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<emphasis italics="true" pageId="0" pageNumber="1">Stephos concavus</emphasis>
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</taxonomicName>
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sp. nov. Female holotype
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<emphasis bold="true" pageId="0" pageNumber="1">A</emphasis>
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antennule
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<emphasis bold="true" pageId="0" pageNumber="1">B</emphasis>
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antenna
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<emphasis bold="true" pageId="0" pageNumber="1">C</emphasis>
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mandible. Scale bars in
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<normalizedToken originalValue="µm">µm</normalizedToken>
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.
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</paragraph>
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</caption>
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Antenna</emphasis>
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(Fig.
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<figureCitation captionStart="Figure 7" captionStartId="F7" captionText="Figure 7. Stephos concavus sp. nov. Female holotype A antennule B antenna C mandible. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure7" httpUri="https://binary.pensoft.net/fig/426098" pageId="0" pageNumber="1">7B</figureCitation>
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) biramous; coxa and basis separate, coxa with one and basis with two setae; endopod 2-segmented, proximal segment with two setae, compound distal segment bilobed with eight and seven plumose setae subterminally and terminally, respectively, outer margin ornamented with a small serrated process subdistally on medial margin; tiny spinule adjacent to serrated process; exopod 7-segmented, with intersegmental articulation between segments 2 and 3 not completely expressed, with setal formula of 1, 3, 1, 1, 1, 1, 3.
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</paragraph>
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Mandible</emphasis>
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(Fig.
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<figureCitation captionStart="Figure 7" captionStartId="F7" captionText="Figure 7. Stephos concavus sp. nov. Female holotype A antennule B antenna C mandible. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure7" httpUri="https://binary.pensoft.net/fig/426098" pageId="0" pageNumber="1">7C</figureCitation>
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): well-developed coxal gnathobase, with a straight row of moderately incised teeth and patched spinules on the anterior and posterior corners. Mandibular palp biramous; basis with four setae on inner margin. Exopod 5-segmented, with setal formula of 1, 1, 1, 1, 2; endopod 2-segmented, proximal with 4 setae and distal segments with 10 setae.
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</paragraph>
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Maxillule</emphasis>
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(Fig.
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<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Stephos concavus sp. nov. Female holotype A maxillule B maxilla C maxilliped D leg 1 E leg 2 F leg 3 G leg 4. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure8" httpUri="https://binary.pensoft.net/fig/426099" pageId="0" pageNumber="1">8A</figureCitation>
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): praecoxal arthrite bearing nine stout marginal spines and four elements on posterior surface, rows of tiny spinules on the posterior surface. Coxal epipodite with nine setae; coxal endite with three stiff setae. Basis with cluster of denticles on the anterior surface; proximal basal endite with four setae; distal basal endite indistinct, with five setae; no trace of basal exite. Exopod with eleven marginal setae; with row of setules along the distal portion of the medial margin. Endopod not articulated to basis, indistinctly 3-segmented, setal formula 4, 4, 7.
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</paragraph>
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Maxilla</emphasis>
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(Fig.
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<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Stephos concavus sp. nov. Female holotype A maxillule B maxilla C maxilliped D leg 1 E leg 2 F leg 3 G leg 4. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure8" httpUri="https://binary.pensoft.net/fig/426099" pageId="0" pageNumber="1">8B</figureCitation>
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): apparently 6-segmented, comprising coalesced praecoxa and coxa, allobasis, and 3-segmented endopod. Armature of praecoxal and coxal endites 5, 3, 3, 3, respectively. Basal endite with four setae, one stouter than the rest; endopodal endite with one seta on tip. Free endopod setal formula 1, 1, 3, respectively. Integument of praecoxa ornamented with a patch of spinules on the posterior margin. Praecoxal and coxal endites with a cluster of long spinules subdistally on the lateral surface; distal coxal endite with an additional row of spinules proximally on the medial surface.
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</paragraph>
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<caption doi="10.3897/zookeys.944.49361.figure8" httpUri="https://binary.pensoft.net/fig/426099" pageId="0" pageNumber="1" start="Figure 8" startId="F8">
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" pageId="0" pageNumber="1">Figure 8.</emphasis>
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<taxonomicName authorityName="Moon & Soh & Cho" authorityYear="2020" class="Hexanauplia" family="Stephidae" genus="Stephos" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stephos concavus" order="Calanoida" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="concavus">
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<emphasis italics="true" pageId="0" pageNumber="1">Stephos concavus</emphasis>
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</taxonomicName>
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sp. nov. Female holotype
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<emphasis bold="true" pageId="0" pageNumber="1">A</emphasis>
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maxillule
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<emphasis bold="true" pageId="0" pageNumber="1">B</emphasis>
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maxilla
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<emphasis bold="true" pageId="0" pageNumber="1">C</emphasis>
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maxilliped
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<emphasis bold="true" pageId="0" pageNumber="1">D</emphasis>
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leg 1
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<emphasis bold="true" pageId="0" pageNumber="1">E</emphasis>
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leg 2
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<emphasis bold="true" pageId="0" pageNumber="1">F</emphasis>
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leg 3
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<emphasis bold="true" pageId="0" pageNumber="1">G</emphasis>
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leg 4. Scale bars in
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<normalizedToken originalValue="µm">µm</normalizedToken>
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.
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</paragraph>
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</caption>
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Maxilliped</emphasis>
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(Fig.
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<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Stephos concavus sp. nov. Female holotype A maxillule B maxilla C maxilliped D leg 1 E leg 2 F leg 3 G leg 4. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure8" httpUri="https://binary.pensoft.net/fig/426099" pageId="0" pageNumber="1">8C</figureCitation>
|
||
): syncoxa robust, with setal formula 1, 2, 2, 3 and an oblique row of tiny spinules on the anterior distal part; basis with three setae and patched setules on the mediolateral margin; endopod 6-segmented, with setal formula 2, 4, 4, 3, 3+1, 4.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Legs 1-4</emphasis>
|
||
(Fig.
|
||
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Stephos concavus sp. nov. Female holotype A maxillule B maxilla C maxilliped D leg 1 E leg 2 F leg 3 G leg 4. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure8" httpUri="https://binary.pensoft.net/fig/426099" pageId="0" pageNumber="1">8D-G</figureCitation>
|
||
) progressively larger towards the posterior, each comprising coxa, basis, and 3-segmented exopod; endopod of leg 1 (Fig.
|
||
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Stephos concavus sp. nov. Female holotype A maxillule B maxilla C maxilliped D leg 1 E leg 2 F leg 3 G leg 4. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure8" httpUri="https://binary.pensoft.net/fig/426099" pageId="0" pageNumber="1">8D</figureCitation>
|
||
) 1-segmented, that of leg 2 (Fig.
|
||
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Stephos concavus sp. nov. Female holotype A maxillule B maxilla C maxilliped D leg 1 E leg 2 F leg 3 G leg 4. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure8" httpUri="https://binary.pensoft.net/fig/426099" pageId="0" pageNumber="1">8E</figureCitation>
|
||
) 2-segmented; endopods of leg 3 (Fig.
|
||
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Stephos concavus sp. nov. Female holotype A maxillule B maxilla C maxilliped D leg 1 E leg 2 F leg 3 G leg 4. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure8" httpUri="https://binary.pensoft.net/fig/426099" pageId="0" pageNumber="1">8F</figureCitation>
|
||
) and P4 (Fig.
|
||
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Stephos concavus sp. nov. Female holotype A maxillule B maxilla C maxilliped D leg 1 E leg 2 F leg 3 G leg 4. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure8" httpUri="https://binary.pensoft.net/fig/426099" pageId="0" pageNumber="1">8G</figureCitation>
|
||
) 3-segmented. Armature formula of legs 1-4 as follows in
|
||
<taxonomicName lsidName="S. jejuensis" pageId="0" pageNumber="1" rank="species" species="jejuensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. jejuensis</emphasis>
|
||
</taxonomicName>
|
||
sp. nov.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
Leg 1 (Fig.
|
||
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Stephos concavus sp. nov. Female holotype A maxillule B maxilla C maxilliped D leg 1 E leg 2 F leg 3 G leg 4. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure8" httpUri="https://binary.pensoft.net/fig/426099" pageId="0" pageNumber="1">8D</figureCitation>
|
||
) biramous, with long curved inner setae on the basis, and endopod with lobe on the outer margin, bearing a minute spinous process and a row of minute spinules on the dorsal surface.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
Leg 2 (Fig.
|
||
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Stephos concavus sp. nov. Female holotype A maxillule B maxilla C maxilliped D leg 1 E leg 2 F leg 3 G leg 4. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure8" httpUri="https://binary.pensoft.net/fig/426099" pageId="0" pageNumber="1">8E</figureCitation>
|
||
) biramous, endopod 2-segmented; coxa and basis unarmed; second endopodal segments with a row of spinules on medial and distal edges, with pointed process on the distolateral corner; exopod 3-segmented, with a row of spinules on the medio to distal margins of the distal exopodal segment.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
Legs 3 (Fig.
|
||
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Stephos concavus sp. nov. Female holotype A maxillule B maxilla C maxilliped D leg 1 E leg 2 F leg 3 G leg 4. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure8" httpUri="https://binary.pensoft.net/fig/426099" pageId="0" pageNumber="1">8F</figureCitation>
|
||
) and 4 (Fig.
|
||
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Stephos concavus sp. nov. Female holotype A maxillule B maxilla C maxilliped D leg 1 E leg 2 F leg 3 G leg 4. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure8" httpUri="https://binary.pensoft.net/fig/426099" pageId="0" pageNumber="1">8G</figureCitation>
|
||
) biramous, with 3-segmented rami: coxa and basis unarmed; second and distal endopodal segments with a row of spinules on the distal edges, with a pointed process on each distolateral corner; exopod with row of spinules on the medio to distal margins of the distal exopodal segment, except for a row of spinules on the posterior surface of leg 4 basis.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
Leg 5 (Fig.
|
||
<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Stephos concavus sp. nov. Female holotype A habitus, dorsal view B habitus, lateral view C urosome, dorsal view D urosome, lateral view E genital double-somite, ventral F leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure6" httpUri="https://binary.pensoft.net/fig/426097" pageId="0" pageNumber="1">6F</figureCitation>
|
||
) symmetric, uniramous, 3-segmented with a proximal segment fused to intercoxal sclerite; basis separated, 2.53 times longer than wide (38
|
||
<normalizedToken originalValue="×">x</normalizedToken>
|
||
15
|
||
<normalizedToken originalValue="μm">μm</normalizedToken>
|
||
) and unarmed. Distal segment constricted slightly at ca. mid-length with five large spinules and a large seta medially and with two rows of teeth on both lateral each sides as figured.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
<emphasis bold="true" pageId="0" pageNumber="1">Male.</emphasis>
|
||
Not collected.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="0" pageNumber="1" type="remarks">
|
||
<paragraph pageId="0" pageNumber="1">Remarks.</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
The new species
|
||
<taxonomicName authorityName="Moon & Soh & Cho" authorityYear="2020" class="Hexanauplia" family="Stephidae" genus="Stephos" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stephos concavus" order="Calanoida" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="concavus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Stephos concavus</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. is easily recognized by its four diagnostic features in the female: the genital double-somite with a protruding lobe on the anterior to medial part of both lateral sides; the presence of seven large rows of spinules on the left side of the genital double-somite; the basis of leg 5 is separated, 2.53 times longer than wide; and the presence of large spinules mediodistally on distal segment of leg 5.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
The new species closely resembles
|
||
<taxonomicName lsidName="S. cryptospinosus" pageId="0" pageNumber="1" rank="species" species="cryptospinosus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. cryptospinosus</emphasis>
|
||
</taxonomicName>
|
||
(
|
||
<bibRefCitation DOI="https://doi.org/10.1093/plankt/22.1.15" author="Zagami, G" journalOrPublisher="Journal of Plankton Research" pageId="0" pageNumber="1" pagination="15 - 27" refId="B23" refString="Zagami, G, Campolmi, M, Costanzo, G, 2000. A new species of Stephos T. Scott, 1892 (Copepoda: Calanoida) from coastal waters of Sicily, Italy. Journal of Plankton Research 22: 15 - 27, DOI: https://doi.org/10.1093/plankt/22.1.15" title="A new species of Stephos T. Scott, 1892 (Copepoda: Calanoida) from coastal waters of Sicily, Italy." url="https://doi.org/10.1093/plankt/22.1.15" volume="22" year="2000">Zagami et al. 2000</bibRefCitation>
|
||
), but it differs in the following features in the female: the body length is 0.93 mm (vs. 0.86 mm in
|
||
<taxonomicName lsidName="S. cryptospinosus" pageId="0" pageNumber="1" rank="species" species="cryptospinosus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. cryptospinosus</emphasis>
|
||
</taxonomicName>
|
||
); the presence of seven spinules on the left side of the genital double-somite (vs. absence in
|
||
<taxonomicName lsidName="S. cryptospinosus" pageId="0" pageNumber="1" rank="species" species="cryptospinosus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. cryptospinosus</emphasis>
|
||
</taxonomicName>
|
||
); the antennule extends beyond the distal end of the genital double-somite (vs. beyond the posterior margin of the prosome in
|
||
<taxonomicName lsidName="S. cryptospinosus" pageId="0" pageNumber="1" rank="species" species="cryptospinosus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. cryptospinosus</emphasis>
|
||
</taxonomicName>
|
||
); the presence of large spinules on the mediodistal margin of leg 5 distal segment (vs. absence in
|
||
<taxonomicName lsidName="S. cryptospinosus" pageId="0" pageNumber="1" rank="species" species="cryptospinosus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. cryptospinosus</emphasis>
|
||
</taxonomicName>
|
||
); and the terminal segment with teeth on both sides and large spinules mediodistally on both fifth legs (vs. absence in
|
||
<taxonomicName lsidName="S. cryptospinosus" pageId="0" pageNumber="1" rank="species" species="cryptospinosus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. cryptospinosus</emphasis>
|
||
</taxonomicName>
|
||
).
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
<taxonomicName authorityName="Moon & Soh & Cho" authorityYear="2020" class="Hexanauplia" family="Stephidae" genus="Stephos" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stephos concavus" order="Calanoida" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="concavus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Stephos concavus</emphasis>
|
||
</taxonomicName>
|
||
differs from another congener
|
||
<taxonomicName lsidName="S. longipes" pageId="0" pageNumber="1" rank="species" species="longipes">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. longipes</emphasis>
|
||
</taxonomicName>
|
||
(Giesbrecht, 1902) in the following features of the female: the genital double-somite with protruding lobe on the anterior to medial part of both sides (vs. triangular lobe on the medial part of both sides in
|
||
<taxonomicName lsidName="S. longipes" pageId="0" pageNumber="1" rank="species" species="longipes">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. longipes</emphasis>
|
||
</taxonomicName>
|
||
); the presence of a row of spinules on the left side of the genital double-somite (vs. absence in
|
||
<taxonomicName lsidName="S. longipes" pageId="0" pageNumber="1" rank="species" species="longipes">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. longipes</emphasis>
|
||
</taxonomicName>
|
||
); the absence of a row of minute spinules on the dorsodistal surface of the genital double-somite (vs. presence in
|
||
<taxonomicName lsidName="S. longipes" pageId="0" pageNumber="1" rank="species" species="longipes">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. longipes</emphasis>
|
||
</taxonomicName>
|
||
); the leg 5 distal segment is tapering and stout (vs. tapering and not stout in
|
||
<taxonomicName lsidName="S. longipes" pageId="0" pageNumber="1" rank="species" species="longipes">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. longipes</emphasis>
|
||
</taxonomicName>
|
||
); and the teeth on the outer margin of both sides (vs. finely serrated fringe on the outer margin in
|
||
<taxonomicName lsidName="S. longipes" pageId="0" pageNumber="1" rank="species" species="longipes">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. longipes</emphasis>
|
||
</taxonomicName>
|
||
).
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |