443 lines
40 KiB
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443 lines
40 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="9CAAB50A1D81593BAFFC6528673FE433" docLanguage="en" docName="ZooKeys 944: 1-30" docOrigin="ZooKeys 944" docSource="http://dx.doi.org/10.3897/zookeys.944.49361" docTitle="Stephos jejuensis Moon & Soh & Cho 2020, sp. nov." docType="treatment" docUuid="94A56606-DD69-43B6-9EB0-F6ED232AF163" 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="164844906" LSID="urn:lsid:zoobank.org:act:94A56606-DD69-43B6-9EB0-F6ED232AF163" httpUri="http://treatment.plazi.org/id/9CAAB50A1D81593BAFFC6528673FE433" 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="9CAAB50A-1D81-593B-AFFC-6528673FE433" authority="Moon & Soh & Cho, 2020" authorityName="Moon & Soh & Cho" authorityYear="2020" class="Hexanauplia" family="Stephidae" genus="Stephos" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stephos jejuensis" order="Calanoida" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="jejuensis" status="sp. nov.">Stephos jejuensis</taxonomicName>
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<taxonomicNameLabel pageId="0" pageNumber="1">sp. nov.</taxonomicNameLabel>
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Stephos jejuensis sp. nov. Female paratype A habitus, dorsal view B habitus, lateral view C urosome, dorsal view D urosome, lateral view E urosome, ventral view F anal somite and caudal rami. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure2" httpUri="https://binary.pensoft.net/fig/426093" pageId="0" pageNumber="1">Figures 2</figureCitation>
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Stephos jejuensis sp. nov. Female paratype A antennule B antenna C mandible D maxillule E maxilla. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure3" httpUri="https://binary.pensoft.net/fig/426094" pageId="0" pageNumber="1">, 3</figureCitation>
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<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Stephos jejuensis sp. nov. Female paratype A maxilliped B leg 1 C leg 2 D leg 3 E Leg 4 F Leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure4" httpUri="https://binary.pensoft.net/fig/426095" pageId="0" pageNumber="1">, 4</figureCitation>
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<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Stephos jejuensis sp. nov. Male paratype A habitus, dorsal view B habitus, lateral view C antennule D-F leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure5" httpUri="https://binary.pensoft.net/fig/426096" pageId="0" pageNumber="1">, 5</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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♀ (NIBRIV0000840220), allotype ♂ (NIBRIV0000840219) undissected in 70% ethanol, 11 November 2012. Dissected
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<emphasis bold="true" italics="true" pageId="0" pageNumber="1">paratypes</emphasis>
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♀ (NIBRIV0000840221), ♂ (NIBRIV0000840222) mounted on two glass slides, 11 November 2011. All specimens collected by D. H. Cho.
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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. 5 m depth), Pyoseon port, Jeju Island (
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<geoCoordinate degrees="33" direction="north" minutes="19" orientation="latitude" precision="15" seconds="32" value="33.325554">33°19'32"N</geoCoordinate>
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,
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<geoCoordinate degrees="126" direction="east" minutes="50" orientation="longitude" precision="15" seconds="42" value="126.845">126°50'42"E</geoCoordinate>
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), Korea.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="etymology">
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<paragraph pageId="0" pageNumber="1">Etymology.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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The specific name of the new species
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<taxonomicName authorityName="Moon & Soh & Cho" authorityYear="2020" class="Hexanauplia" family="Stephidae" genus="Stephos" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="jejuensis" order="Calanoida" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="jejuensis">
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<emphasis italics="true" pageId="0" pageNumber="1">jejuensis</emphasis>
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</taxonomicName>
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refers to the type locality.
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</paragraph>
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<caption doi="10.3897/zookeys.944.49361.figure2" httpUri="https://binary.pensoft.net/fig/426093" pageId="0" pageNumber="1" start="Figure 2" startId="F2">
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" pageId="0" pageNumber="1">Figure 2.</emphasis>
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<taxonomicName authorityName="Moon & Soh & Cho" authorityYear="2020" class="Hexanauplia" family="Stephidae" genus="Stephos" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stephos jejuensis" order="Calanoida" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="jejuensis">
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<emphasis italics="true" pageId="0" pageNumber="1">Stephos jejuensis</emphasis>
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</taxonomicName>
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sp. nov. Female paratype
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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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urosome, ventral view
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<emphasis bold="true" pageId="0" pageNumber="1">F</emphasis>
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anal somite and caudal rami. 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 2" captionStartId="F2" captionText="Figure 2. Stephos jejuensis sp. nov. Female paratype A habitus, dorsal view B habitus, lateral view C urosome, dorsal view D urosome, lateral view E urosome, ventral view F anal somite and caudal rami. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure2" httpUri="https://binary.pensoft.net/fig/426093" pageId="0" pageNumber="1">2A, B</figureCitation>
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) robust, length 0.92 mm (mean 0.91
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<normalizedToken originalValue="±">+/-</normalizedToken>
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0.03,
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<emphasis italics="true" pageId="0" pageNumber="1">N</emphasis>
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= 3). 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 2" captionStartId="F2" captionText="Figure 2. Stephos jejuensis sp. nov. Female paratype A habitus, dorsal view B habitus, lateral view C urosome, dorsal view D urosome, lateral view E urosome, ventral view F anal somite and caudal rami. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure2" httpUri="https://binary.pensoft.net/fig/426093" pageId="0" pageNumber="1">2A, B</figureCitation>
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), posterior corners of fifth pedigerous somite slightly asymmetric. Rostrum represented by a rounded knob. Prosome-urosome ratio 2.61:1. 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 48.2: 14.2: 12.6:11.7:13.4 = 100. Genital double-somite (Fig.
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Stephos jejuensis sp. nov. Female paratype A habitus, dorsal view B habitus, lateral view C urosome, dorsal view D urosome, lateral view E urosome, ventral view F anal somite and caudal rami. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure2" httpUri="https://binary.pensoft.net/fig/426093" pageId="0" pageNumber="1">2C, E</figureCitation>
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) asymmetric, with protruding lobe on the anterior to posterior of the left side and a projecting lobe to distal margin, with minute spinules patched in lateral view (Fig.
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Stephos jejuensis sp. nov. Female paratype A habitus, dorsal view B habitus, lateral view C urosome, dorsal view D urosome, lateral view E urosome, ventral view F anal somite and caudal rami. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure2" httpUri="https://binary.pensoft.net/fig/426093" pageId="0" pageNumber="1">2D</figureCitation>
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); on the right anterior side is a swollen, common operculum bumpy-shaped ventromedially and with ear lobe on the ventrolateral margin. First and second abdominal somites with transverse hyaline frill dorsally and ventrally. Anal somite short. Caudal rami (Fig.
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Stephos jejuensis sp. nov. Female paratype A habitus, dorsal view B habitus, lateral view C urosome, dorsal view D urosome, lateral view E urosome, ventral view F anal somite and caudal rami. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure2" httpUri="https://binary.pensoft.net/fig/426093" pageId="0" pageNumber="1">2F</figureCitation>
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), with six setae, symmetric, 1.45 times longer than wide (44
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<normalizedToken originalValue="×">x</normalizedToken>
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31
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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 3" captionStartId="F3" captionText="Figure 3. Stephos jejuensis sp. nov. Female paratype A antennule B antenna C mandible D maxillule E maxilla. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure3" httpUri="https://binary.pensoft.net/fig/426094" pageId="0" pageNumber="1">3A</figureCitation>
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) symmetric, extending beyond the 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-1+ae, XXII-1, XXIII-1+ae, XXIV-1+1, XXV-1+1, XXVI-1+1, XXVII-XXVIII-5+ae. Ancestral segments I to XIV and XVI to XXV with a row of spinules on the posterior surface.
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</paragraph>
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<caption doi="10.3897/zookeys.944.49361.figure3" httpUri="https://binary.pensoft.net/fig/426094" pageId="0" pageNumber="1" start="Figure 3" startId="F3">
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" pageId="0" pageNumber="1">Figure 3.</emphasis>
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<taxonomicName authorityName="Moon & Soh & Cho" authorityYear="2020" class="Hexanauplia" family="Stephidae" genus="Stephos" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stephos jejuensis" order="Calanoida" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="jejuensis">
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<emphasis italics="true" pageId="0" pageNumber="1">Stephos jejuensis</emphasis>
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</taxonomicName>
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sp. nov. Female paratype
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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
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<emphasis bold="true" pageId="0" pageNumber="1">D</emphasis>
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maxillule
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<emphasis bold="true" pageId="0" pageNumber="1">E</emphasis>
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maxilla. 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 3" captionStartId="F3" captionText="Figure 3. Stephos jejuensis sp. nov. Female paratype A antennule B antenna C mandible D maxillule E maxilla. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure3" httpUri="https://binary.pensoft.net/fig/426094" pageId="0" pageNumber="1">3B</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 small serrated process subdistally on the 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 3" captionStartId="F3" captionText="Figure 3. Stephos jejuensis sp. nov. Female paratype A antennule B antenna C mandible D maxillule E maxilla. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure3" httpUri="https://binary.pensoft.net/fig/426094" pageId="0" pageNumber="1">3C</figureCitation>
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): well-developed coxal gnathobase, with a straight row of moderately incised teeth. Mandibular palp biramous; basis with four setae on the inner margin. Exopod 5-segmented, with setal formula of 1, 1, 1, 1, 2; endopod 2-segmented, proximal with four setae and distal segments with ten 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 3" captionStartId="F3" captionText="Figure 3. Stephos jejuensis sp. nov. Female paratype A antennule B antenna C mandible D maxillule E maxilla. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure3" httpUri="https://binary.pensoft.net/fig/426094" pageId="0" pageNumber="1">3D</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 and a 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 3" captionStartId="F3" captionText="Figure 3. Stephos jejuensis sp. nov. Female paratype A antennule B antenna C mandible D maxillule E maxilla. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure3" httpUri="https://binary.pensoft.net/fig/426094" pageId="0" pageNumber="1">3E</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. 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 patch of spinules on the posterior margin. Praecoxal and coxal endites with cluster of long spinules subdistally on the lateral surface; distal coxal endite with additional row of spinules proximally on the medial surface.
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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">Maxilliped</emphasis>
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(Fig.
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<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Stephos jejuensis sp. nov. Female paratype A maxilliped B leg 1 C leg 2 D leg 3 E Leg 4 F Leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure4" httpUri="https://binary.pensoft.net/fig/426095" pageId="0" pageNumber="1">4A</figureCitation>
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): syncoxa robust, with setal formula 1, 2, 2, 3 and oblique row of tiny spinules on the posterior distal part; basis with three setae and a row of setules on the mediolateral margin; endopod 6-segmented, with setal formula 2, 4, 4, 3, 3+1, 4.
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</paragraph>
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<caption doi="10.3897/zookeys.944.49361.figure4" httpUri="https://binary.pensoft.net/fig/426095" pageId="0" pageNumber="1" start="Figure 4" startId="F4">
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" pageId="0" pageNumber="1">Figure 4.</emphasis>
|
||
<taxonomicName authorityName="Moon & Soh & Cho" authorityYear="2020" class="Hexanauplia" family="Stephidae" genus="Stephos" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stephos jejuensis" order="Calanoida" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="jejuensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Stephos jejuensis</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. Female paratype
|
||
<emphasis bold="true" pageId="0" pageNumber="1">A</emphasis>
|
||
maxilliped
|
||
<emphasis bold="true" pageId="0" pageNumber="1">B</emphasis>
|
||
leg 1
|
||
<emphasis bold="true" pageId="0" pageNumber="1">C</emphasis>
|
||
leg 2
|
||
<emphasis bold="true" pageId="0" pageNumber="1">D</emphasis>
|
||
leg 3
|
||
<emphasis bold="true" pageId="0" pageNumber="1">E</emphasis>
|
||
Leg 4
|
||
<emphasis bold="true" pageId="0" pageNumber="1">F</emphasis>
|
||
Leg 5. Scale bars in
|
||
<normalizedToken originalValue="µm">µm</normalizedToken>
|
||
.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Legs 1-4</emphasis>
|
||
(Fig.
|
||
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Stephos jejuensis sp. nov. Female paratype A maxilliped B leg 1 C leg 2 D leg 3 E Leg 4 F Leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure4" httpUri="https://binary.pensoft.net/fig/426095" pageId="0" pageNumber="1">4B-E</figureCitation>
|
||
) progressively larger toward the posterior, each comprising coxa, basis, and 3-segmented exopod; endopod of leg 1 (Fig.
|
||
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Stephos jejuensis sp. nov. Female paratype A maxilliped B leg 1 C leg 2 D leg 3 E Leg 4 F Leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure4" httpUri="https://binary.pensoft.net/fig/426095" pageId="0" pageNumber="1">4B</figureCitation>
|
||
) 1-segmented, that of leg 2 (Fig.
|
||
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Stephos jejuensis sp. nov. Female paratype A maxilliped B leg 1 C leg 2 D leg 3 E Leg 4 F Leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure4" httpUri="https://binary.pensoft.net/fig/426095" pageId="0" pageNumber="1">4C</figureCitation>
|
||
) 2-segmented; endopods of P3 (Fig.
|
||
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Stephos jejuensis sp. nov. Female paratype A maxilliped B leg 1 C leg 2 D leg 3 E Leg 4 F Leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure4" httpUri="https://binary.pensoft.net/fig/426095" pageId="0" pageNumber="1">4D</figureCitation>
|
||
) and leg 4 (Fig.
|
||
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Stephos jejuensis sp. nov. Female paratype A maxilliped B leg 1 C leg 2 D leg 3 E Leg 4 F Leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure4" httpUri="https://binary.pensoft.net/fig/426095" pageId="0" pageNumber="1">4E</figureCitation>
|
||
) 3-segmented. Armature formula of legs 1-4 as follows (Roman numerals indicate spines, Arabic numeral indicates setae):
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
<table pageId="0" pageNumber="1">
|
||
<tr pageId="0" pageNumber="1">
|
||
<th colspan="1" pageId="0" pageNumber="1" rowspan="1">Legs</th>
|
||
<th colspan="1" pageId="0" pageNumber="1" rowspan="1">Coxa</th>
|
||
<th colspan="1" pageId="0" pageNumber="1" rowspan="1">Basis</th>
|
||
<th colspan="1" pageId="0" pageNumber="1" rowspan="1">Exopod</th>
|
||
<th colspan="1" pageId="0" pageNumber="1" rowspan="1">Endopod</th>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="1">
|
||
<td colspan="1" pageId="0" pageNumber="1" rowspan="1">Leg 1</td>
|
||
<td colspan="1" pageId="0" pageNumber="1" rowspan="1">0-0</td>
|
||
<td colspan="1" pageId="0" pageNumber="1" rowspan="1">0-1</td>
|
||
<td colspan="1" pageId="0" pageNumber="1" rowspan="1">0-0; I-1; I,1,3</td>
|
||
<td colspan="1" pageId="0" pageNumber="1" rowspan="1">0,2,3</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="1">
|
||
<td colspan="1" pageId="0" pageNumber="1" rowspan="1">Leg 2</td>
|
||
<td colspan="1" pageId="0" pageNumber="1" rowspan="1">0-1</td>
|
||
<td colspan="1" pageId="0" pageNumber="1" rowspan="1">0-0</td>
|
||
<td colspan="1" pageId="0" pageNumber="1" rowspan="1">I-1; I-1; III,I,4</td>
|
||
<td colspan="1" pageId="0" pageNumber="1" rowspan="1">0-1; 1,2,2</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="1">
|
||
<td colspan="1" pageId="0" pageNumber="1" rowspan="1">Legs 3 and 4</td>
|
||
<td colspan="1" pageId="0" pageNumber="1" rowspan="1">0-1</td>
|
||
<td colspan="1" pageId="0" pageNumber="1" rowspan="1">0-0</td>
|
||
<td colspan="1" pageId="0" pageNumber="1" rowspan="1">I-1; I-1; III,I,4</td>
|
||
<td colspan="1" pageId="0" pageNumber="1" rowspan="1">0-1; 1,2,2</td>
|
||
</tr>
|
||
</table>
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
Leg 1 (Fig.
|
||
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Stephos jejuensis sp. nov. Female paratype A maxilliped B leg 1 C leg 2 D leg 3 E Leg 4 F Leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure4" httpUri="https://binary.pensoft.net/fig/426095" pageId="0" pageNumber="1">4B</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 anterior surface.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
Leg 2 (Fig.
|
||
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Stephos jejuensis sp. nov. Female paratype A maxilliped B leg 1 C leg 2 D leg 3 E Leg 4 F Leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure4" httpUri="https://binary.pensoft.net/fig/426095" pageId="0" pageNumber="1">4C</figureCitation>
|
||
) biramous, endopod 2-segmented; coxa and basis unarmed; second endopodal segments with a row of spinules on the medial and distal edges, with a 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 4" captionStartId="F4" captionText="Figure 4. Stephos jejuensis sp. nov. Female paratype A maxilliped B leg 1 C leg 2 D leg 3 E Leg 4 F Leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure4" httpUri="https://binary.pensoft.net/fig/426095" pageId="0" pageNumber="1">4D</figureCitation>
|
||
) and 4 (Fig.
|
||
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Stephos jejuensis sp. nov. Female paratype A maxilliped B leg 1 C leg 2 D leg 3 E Leg 4 F Leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure4" httpUri="https://binary.pensoft.net/fig/426095" pageId="0" pageNumber="1">4E</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 of the distolateral corners; exopod with a row of spinules on the medial to distal margins of the distal exopodal segment.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
Leg 5 (Fig.
|
||
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Stephos jejuensis sp. nov. Female paratype A maxilliped B leg 1 C leg 2 D leg 3 E Leg 4 F Leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure4" httpUri="https://binary.pensoft.net/fig/426095" pageId="0" pageNumber="1">4F</figureCitation>
|
||
) symmetric, uniramous, 3-segmented with a proximal segment fused to intercoxal sclerite; basis separated, 2.27 times longer than wide (41
|
||
<normalizedToken originalValue="×">x</normalizedToken>
|
||
18
|
||
<normalizedToken originalValue="μm">μm</normalizedToken>
|
||
), widening distally with minute spinules on the anterior corner and an acute inner process, and unarmed. Distal segment with a transverse row of spinules across near the middle part and an outer seta medially.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="0" pageNumber="1" type="description">
|
||
<paragraph pageId="0" pageNumber="1">Description of male.</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Body</emphasis>
|
||
(Fig.
|
||
<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Stephos jejuensis sp. nov. Male paratype A habitus, dorsal view B habitus, lateral view C antennule D-F leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure5" httpUri="https://binary.pensoft.net/fig/426096" pageId="0" pageNumber="1">5A, B</figureCitation>
|
||
) robust, length 0.93 mm. Prosome 5-segmented; cephalosome and first pedigerous somites completely separated; fourth and fifth pedigerous somites incompletely fused (Fig.
|
||
<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Stephos jejuensis sp. nov. Male paratype A habitus, dorsal view B habitus, lateral view C antennule D-F leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure5" httpUri="https://binary.pensoft.net/fig/426096" pageId="0" pageNumber="1">5A</figureCitation>
|
||
). Rostrum same as in female. Prosome-urosome ratio 2.18:1. Urosome 5-segmented, comprising genital somite, three free abdominal somites, and anal somite; length ratio of genital somite, first to fourth free abdominal somites, and anal somite as 27.5: 19.2: 16.3: 14.5: 10.9: 11.5 = 100. Genital somite with asymmetric and protruding lobe on the left side. First to third abdominal somites with transverse hyaline frill dorsally and ventrally. Anal somite shortest. Caudal rami similar to those of the female.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Antennule</emphasis>
|
||
(Fig.
|
||
<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Stephos jejuensis sp. nov. Male paratype A habitus, dorsal view B habitus, lateral view C antennule D-F leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure5" httpUri="https://binary.pensoft.net/fig/426096" pageId="0" pageNumber="1">5C</figureCitation>
|
||
) symmetric, extending beyond the distal area of the 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+2ea, 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-1+ae, XXII-1, XXIII-1+ae, XXIV-1+1, XXV-1+1, XXVI-1+1, XXVII-XXVIII-5+ae. Ancestral segments I-XIV and XVI-XXV with row of spinules on the posterior surface.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Antenna</emphasis>
|
||
, mandible, maxillule, maxilla, maxilliped and legs 1-4 similar to those of the female.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Leg 5</emphasis>
|
||
(Fig.
|
||
<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Stephos jejuensis sp. nov. Male paratype A habitus, dorsal view B habitus, lateral view C antennule D-F leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure5" httpUri="https://binary.pensoft.net/fig/426096" pageId="0" pageNumber="1">5D-F</figureCitation>
|
||
), strongly asymmetric, slender on both sides, developed as a grasping organ on the left. Right leg 4-segmented; coxa and basis are short, unarmed, but thickened proximally; terminal segment comprising a single longer process (see arrowed in Fig.
|
||
<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Stephos jejuensis sp. nov. Male paratype A habitus, dorsal view B habitus, lateral view C antennule D-F leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure5" httpUri="https://binary.pensoft.net/fig/426096" pageId="0" pageNumber="1">5F</figureCitation>
|
||
), outwardly directed, curved medially, and acute at its tip. Left leg 5-segmented (see Fig.
|
||
<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Stephos jejuensis sp. nov. Male paratype A habitus, dorsal view B habitus, lateral view C antennule D-F leg 5. Scale bars in µm." figureDoi="10.3897/zookeys.944.49361.figure5" httpUri="https://binary.pensoft.net/fig/426096" pageId="0" pageNumber="1">5E</figureCitation>
|
||
); proximal segment ca. as long as right proximal segment; second segment with rounded outgrowth on medial margin; third segment elongated, unarmed; fourth segment narrow, shorter than third segment; terminal segment complex, with 5 terminal (long) and 5 subterminal (short) lamella spines.
|
||
</paragraph>
|
||
<caption doi="10.3897/zookeys.944.49361.figure5" httpUri="https://binary.pensoft.net/fig/426096" pageId="0" pageNumber="1" start="Figure 5" startId="F5">
|
||
<paragraph pageId="0" pageNumber="1">
|
||
<emphasis bold="true" pageId="0" pageNumber="1">Figure 5.</emphasis>
|
||
<taxonomicName authorityName="Moon & Soh & Cho" authorityYear="2020" class="Hexanauplia" family="Stephidae" genus="Stephos" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stephos jejuensis" order="Calanoida" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="jejuensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Stephos jejuensis</emphasis>
|
||
</taxonomicName>
|
||
sp. nov. Male paratype
|
||
<emphasis bold="true" pageId="0" pageNumber="1">A</emphasis>
|
||
habitus, dorsal view
|
||
<emphasis bold="true" pageId="0" pageNumber="1">B</emphasis>
|
||
habitus, lateral view
|
||
<emphasis bold="true" pageId="0" pageNumber="1">C</emphasis>
|
||
antennule
|
||
<emphasis bold="true" pageId="0" pageNumber="1">D-F</emphasis>
|
||
leg 5. Scale bars in
|
||
<normalizedToken originalValue="µm">µm</normalizedToken>
|
||
.
|
||
</paragraph>
|
||
</caption>
|
||
</subSubSection>
|
||
<subSubSection pageId="0" pageNumber="1" type="variation">
|
||
<paragraph pageId="0" pageNumber="1">Variations.</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
Within this new species, there was a
|
||
<taxonomicName class="Hexanauplia" family="Stephidae" genus="Stephos" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="minor" order="Calanoida" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="minor">minor</taxonomicName>
|
||
variation in the number of spinules on the genital double-somite and on the surfaces of legs 1-4 in both sexes.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="0" pageNumber="1" type="remarks">
|
||
<paragraph pageId="0" pageNumber="1">Remarks.</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
The genital double-somite in most species of
|
||
<taxonomicName class="Hexanauplia" family="Stephidae" genus="Stephos" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stephos" order="Calanoida" pageId="0" pageNumber="1" phylum="Arthropoda" rank="genus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Stephos</emphasis>
|
||
</taxonomicName>
|
||
has been found to be symmetric and/or slightly asymmetric in shape. The feature of an asymmetric genital somite 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. is shared with five of its congeners,
|
||
<taxonomicName lsidName="S. lamellatus" pageId="0" pageNumber="1" rank="species" species="lamellatus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. lamellatus</emphasis>
|
||
</taxonomicName>
|
||
Sars, 1902;
|
||
<taxonomicName lsidName="S. tsuyazakiensis" pageId="0" pageNumber="1" rank="species" species="tsuyazakiensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. tsuyazakiensis</emphasis>
|
||
</taxonomicName>
|
||
Tanaka, 1966;
|
||
<taxonomicName lsidName="S. exumensis" pageId="0" pageNumber="1" rank="species" species="exumensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. exumensis</emphasis>
|
||
</taxonomicName>
|
||
Fosshagen, 1970;
|
||
<taxonomicName lsidName="S. kurilensis" pageId="0" pageNumber="1" rank="species" species="kurilensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. kurilensis</emphasis>
|
||
</taxonomicName>
|
||
Kos, 1972; and
|
||
<taxonomicName lsidName="S. robustus" pageId="0" pageNumber="1" rank="species" species="robustus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. robustus</emphasis>
|
||
</taxonomicName>
|
||
Ohtsuka & Hiromi, 1987. Of these,
|
||
<taxonomicName lsidName="S. jejuensis" pageId="0" pageNumber="1" rank="species" species="jejuensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. jejuensis</emphasis>
|
||
</taxonomicName>
|
||
has a projecting lobe on the distal margin in the lateral side of the genital double-somite; however, the other five species do not have this feature.
|
||
<taxonomicName authorityName="Moon & Soh & Cho" authorityYear="2020" class="Hexanauplia" family="Stephidae" genus="Stephos" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stephos jejuensis" order="Calanoida" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="jejuensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Stephos jejuensis</emphasis>
|
||
</taxonomicName>
|
||
has been group IV.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
In addition,
|
||
<taxonomicName lsidName="S. jejuensis" pageId="0" pageNumber="1" rank="species" species="jejuensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. jejuensis</emphasis>
|
||
</taxonomicName>
|
||
expresses by two diagnostic features: the fifth pedigerous somite is slightly asymmetric; and a projecting lobe in the lateral side of the genital double-somite. These features are shared by only one other species:
|
||
<taxonomicName lsidName="S. jejuensis" pageId="0" pageNumber="1" rank="species" species="jejuensis">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. jejuensis</emphasis>
|
||
</taxonomicName>
|
||
can be distinguished from
|
||
<taxonomicName lsidName="S. maculosus" pageId="0" pageNumber="1" rank="species" species="maculosus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. maculosus</emphasis>
|
||
</taxonomicName>
|
||
(
|
||
<bibRefCitation DOI="https://doi.org/10.1080/00288330.1999.9516853" author="Bradford-Grieve, J" journalOrPublisher="New Zealand Journal of Marine Freshwater Research" pageId="0" pageNumber="1" pagination="13 - 27" refId="B4" refString="Bradford-Grieve, J, 1999. New species of benthopelagic copepods of the genus Stephos (Calanoida: Stephidae) from Wellington Harbour, New Zealand. New Zealand Journal of Marine Freshwater Research 33: 13 - 27, DOI: https://doi.org/10.1080/00288330.1999.9516853" title="New species of benthopelagic copepods of the genus Stephos (Calanoida: Stephidae) from Wellington Harbour, New Zealand." url="https://doi.org/10.1080/00288330.1999.9516853" volume="33" year="1999">Bradford-Grieve 1999</bibRefCitation>
|
||
) by the following features in the female: the body length is 0.92 mm (vs. 0.62 mm in
|
||
<taxonomicName lsidName="S. maculosus" pageId="0" pageNumber="1" rank="species" species="maculosus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. maculosus</emphasis>
|
||
</taxonomicName>
|
||
); dorsally the left side of the genital double-somite has anterior and posterior protruding lobes (vs. without protruding lobe in
|
||
<taxonomicName lsidName="S. maculosus" pageId="0" pageNumber="1" rank="species" species="maculosus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. maculosus</emphasis>
|
||
</taxonomicName>
|
||
); the antennule extends beyond the distal area of the genital double-somite (vs. not beyond the distal area in
|
||
<taxonomicName lsidName="S. maculosus" pageId="0" pageNumber="1" rank="species" species="maculosus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. maculosus</emphasis>
|
||
</taxonomicName>
|
||
); and the distal segment is less than four times longer than the second segment of leg 5 (vs. more than four times in
|
||
<taxonomicName lsidName="S. maculosus" pageId="0" pageNumber="1" rank="species" species="maculosus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. maculosus</emphasis>
|
||
</taxonomicName>
|
||
). In the male: the body length is 0.93 mm (vs. 0.54 mm in
|
||
<taxonomicName lsidName="S. maculosus" pageId="0" pageNumber="1" rank="species" species="maculosus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. maculosus</emphasis>
|
||
</taxonomicName>
|
||
); the antennule extends beyond the distal area of the genital double-somite (vs. beyond the anterior margin of the caudal rami in
|
||
<taxonomicName lsidName="S. maculosus" pageId="0" pageNumber="1" rank="species" species="maculosus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. maculosus</emphasis>
|
||
</taxonomicName>
|
||
); on the leg 5 fourth segment of the male is narrow (vs. with an finger-like lobe on the medial expansion in
|
||
<taxonomicName lsidName="S. maculosus" pageId="0" pageNumber="1" rank="species" species="maculosus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. maculosus</emphasis>
|
||
</taxonomicName>
|
||
); and the leg 5 terminal segment complex consists of five terminal (long) and five subterminal (short) lamella spines (vs. not complex, only with three lamella spines in in
|
||
<taxonomicName lsidName="S. maculosus" pageId="0" pageNumber="1" rank="species" species="maculosus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">S. maculosus</emphasis>
|
||
</taxonomicName>
|
||
).
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |