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<document ID-DOI="http://dx.doi.org/10.3897/zookeys.1099.76479" ID-Pensoft-Pub="1313-2970-1099-155" ID-Pensoft-UUID="2D995654666955B2B228852B9EA78EAC" ID-ZooBank="A963E7C7F1BF4BF2BB4FA0CD5D319691" ModsDocID="1313-2970-1099-155" checkinTime="1652359792651" checkinUser="pensoft" docAuthor="Nethupul, Hasitha, Stoehr, Sabine &amp; Zhang, Haibin" docDate="2022" docId="DB59B78934D2546B84B2A49EE47453C4" docLanguage="en" docName="ZooKeys 1099: 155-202" docOrigin="ZooKeys 1099" docPubDate="2022-05-11" docSource="http://dx.doi.org/10.3897/zookeys.1099.76479" docTitle="Ophioplinthaca amezianeae O'Hara &amp; Stoehr 2006" docType="treatment" docVersion="1" id="2D995654666955B2B228852B9EA78EAC" lastPageNumber="155" masterDocId="2D995654666955B2B228852B9EA78EAC" masterDocTitle="Review of Ophioplinthaca Verrill, 1899 (Echinodermata, Ophiuroidea, Ophiacanthidae), description of new species in Ophioplinthaca and Ophiophthalmus, and new records from the Northwest Pacific and the South China Sea" masterLastPageNumber="202" masterPageNumber="155" pageNumber="155" updateTime="1652360094556" updateUser="ExternalLinkService">
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<mods:titleInfo>
<mods:title>Review of Ophioplinthaca Verrill, 1899 (Echinodermata, Ophiuroidea, Ophiacanthidae), description of new species in Ophioplinthaca and Ophiophthalmus, and new records from the Northwest Pacific and the South China Sea</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Nethupul, Hasitha</mods:namePart>
<mods:affiliation>Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, CAS, 57200 Sanya, China &amp; University of Chinese Academy of Sciences, Beijing 100039, China</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Stoehr, Sabine</mods:namePart>
<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0002-2586-7239</mods:nameIdentifier>
<mods:affiliation>Swedish Museum of Natural History, Dept of Zoology, Box 50007, 10405 Stockholm, Sweden</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Zhang, Haibin</mods:namePart>
<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0001-5429-9851</mods:nameIdentifier>
<mods:affiliation>Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, CAS, 57200 Sanya, China</mods:affiliation>
<mods:nameIdentifier type="email">hzhang@idsse.ac.cn</mods:nameIdentifier>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
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<mods:titleInfo>
<mods:title>ZooKeys</mods:title>
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<mods:part>
<mods:date>2022</mods:date>
<mods:detail type="pubDate">
<mods:number>2022-05-11</mods:number>
</mods:detail>
<mods:detail type="volume">
<mods:number>1099</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>155</mods:start>
<mods:end>202</mods:end>
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<mods:location>
<mods:url>http://dx.doi.org/10.3897/zookeys.1099.76479</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.1099.76479</mods:identifier>
<mods:identifier type="Pensoft-Pub">1313-2970-1099-155</mods:identifier>
<mods:identifier type="ZooBank">A963E7C7F1BF4BF2BB4FA0CD5D319691</mods:identifier>
<mods:identifier type="Pensoft-UUID">2D995654666955B2B228852B9EA78EAC</mods:identifier>
</mods:mods>
<treatment LSID="urn:lsid:plazi:treatment:DB59B78934D2546B84B2A49EE47453C4" httpUri="http://treatment.plazi.org/id/DB59B78934D2546B84B2A49EE47453C4" lastPageNumber="155" pageId="0" pageNumber="155">
<subSubSection pageId="0" pageNumber="155" type="nomenclature">
<paragraph pageId="0" pageNumber="155">
<taxonomicName LSID="DB59B789-34D2-546B-84B2-A49EE47453C4" authority="O'Hara &amp; Stoehr, 2006" authorityName="O'Hara &amp; Stoehr" authorityYear="2006" class="Ophiuroidea" family="Ophiacanthidae" genus="Ophioplinthaca" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ophioplinthaca amezianeae" order="Amphilepidida" pageId="0" pageNumber="155" phylum="Echinodermata" rank="species" species="amezianeae">
Ophioplinthaca amezianeae
<normalizedToken originalValue="OHara">O'Hara</normalizedToken>
&amp;
<normalizedToken originalValue="Stöhr">Stoehr</normalizedToken>
, 2006
</taxonomicName>
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="155" type="description">
<paragraph pageId="0" pageNumber="155">
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">Figs 8</figureCitation>
<figureCitation captionStart="Figure 9" captionStartId="F9" captionText="Figure 9. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A, B lateral arm plate C ventral arm spine D-H vertebrae D proximal view E distal view F ventral view G dorsal view H lateral view. Abbreviations: d dorsal, de depression, dist distal, lac lateral ambulacral canals, mo muscle opening, no nerve opening, pb podial basin, prox proximal, ri ridge, th thorns, v ventral, vs volute-shape. Scale bars: 800 µm (A-E, G, H); 500 µm (F)." figureDoi="10.3897/zookeys.1099.76479.figure9" httpUri="https://binary.pensoft.net/fig/682270" pageId="0" pageNumber="155">, 9</figureCitation>
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="155" type="reference_group">
<paragraph pageId="0" pageNumber="155">
<taxonomicName authorityName="O'Hara &amp; Stoehr" authorityYear="2006" class="Ophiuroidea" family="Ophiacanthidae" genus="Ophioplinthaca" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ophioplinthaca amezianeae" order="Amphilepidida" pageId="0" pageNumber="155" phylum="Echinodermata" rank="species" species="amezianeae">Ophioplinthaca amezianeae</taxonomicName>
<normalizedToken originalValue="OHara">O'Hara</normalizedToken>
&amp;
<normalizedToken originalValue="Stöhr">Stoehr</normalizedToken>
, 2006: 77-78, fig. 9D-G.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="155" type="materials_examined">
<paragraph pageId="0" pageNumber="155">Material examined.</paragraph>
<paragraph pageId="0" pageNumber="155">
<materialsCitation accessionNumber="OK043832" collectingDate="2020-11-27" country="Guam Island" county="Southwest" elevation="3600" latitude="11.672167" location="Northwest Pacific" longLatPrecision="13" longitude="141.34283" municipality="Mariana Trench" specimenCount="1">
<location LSID="urn:lsid:plazi:treatment:DB59B78934D2546B84B2A49EE47453C4:B9490B7C71A8F69B1D3418EE3A028DCC" country="Guam Island" county="Southwest" latitude="11.672167" longLatPrecision="13" longitude="141.34283" municipality="Mariana Trench" name="Northwest Pacific">Northwest Pacific</location>
<specimenCount type="generic">1 specimen</specimenCount>
; near
<collectingMunicipality>Mariana Trench</collectingMunicipality>
,
<collectingCounty>Southwest</collectingCounty>
of
<collectingCountry name="Guam Island">Guam Island</collectingCountry>
, seamount;
<geoCoordinate degrees="11" direction="north" minutes="40.33" orientation="latitude" precision="9" value="11.672167">11°40.33'N</geoCoordinate>
,
<geoCoordinate degrees="141" direction="east" minutes="20.57" orientation="longitude" precision="9" value="141.34283">141°20.57'E</geoCoordinate>
; depth
<quantity metricMagnitude="3" metricUnit="m" metricValue="3.6" unit="m" value="3600.0">
<elevation metricMagnitude="3" metricUnit="m" metricValue="3.6" unit="m" value="3600.0">3600 m</elevation>
</quantity>
;
<collectingDate value="2020-11-27">27 November 2020</collectingDate>
; Collecting event: stn. SC040; Shenhaiyongshi msv leg; preserved in -80 °C; GenBank:
<accessionNumber httpUri="http://www.ncbi.nlm.nih.gov/nucleotide/OK043832">OK043832</accessionNumber>
; IDSSE-EEB-SW0109
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="155" type="description">
<paragraph pageId="0" pageNumber="155">Description.</paragraph>
<paragraph pageId="0" pageNumber="155">
Disc diameter 11.5 mm, arm base width 2.5 mm (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8</figureCitation>
).
</paragraph>
<paragraph pageId="0" pageNumber="155">
<emphasis bold="true" pageId="0" pageNumber="155">
<emphasis italics="true" pageId="0" pageNumber="155">Disc</emphasis>
.
</emphasis>
Sub-pentagonal and incised interradially to 1/8 disc radius, creating five wedge-shaped lobes over each arm base in contrast to sunken center and interradii of disc (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8A, B</figureCitation>
). Disc scales variable in size, overlapping, dense at center, and some scales bear spines (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8C</figureCitation>
). Scales increase in size distalwards from disc center to distal end of radial shields interradially (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8C-G</figureCitation>
). Disc spines at disc center 0.7-0.9 mm high, thick, with cylindrical to rounded base, tapering to a sharp point, or terminating in usually one or two small thorns, with additional irregular flanged thorns arising from lateral margins along the spine (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8D, E</figureCitation>
). Disc spines on disc periphery and around radial shields, slightly smaller than center spines (0.5-0.7 mm in height), cylindrical, finely rugose, with thorny blunt tip (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8F, G</figureCitation>
). Radial shields large, twice as long as wide, with acute proximal end, much wider convex distal end, and completely separated by disc scales (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8H</figureCitation>
). Ventral disc covered by smaller scales compared to dorsal scales and overlapped, without or rarely bearing spines (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8B, I</figureCitation>
). Genital slits conspicuous and extending from oral shield to periphery of disc (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8I</figureCitation>
). Madreporite arrowhead-shaped, as wide as long, triangular with pointed proximal end, convex distal edge with thickened lateral margins (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8I</figureCitation>
). Oral shield arrowhead-shaped, as wide as long, triangular with pointed proximal end, slightly concave lateral margins along adoral shields, lobed distal edge with rounded lateral margins (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8I</figureCitation>
). Adoral shield 3
<normalizedToken originalValue="×">x</normalizedToken>
as long as wide, with straight lateral margin, and pair of shields proximally connected (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8I</figureCitation>
). Jaw longer than wide, and oral plates concealed by adoral shields (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8I</figureCitation>
). Jaw bearing one large, pointed ventralmost tooth with three pointed, rod-like lateral oral papillae, shorter than ventralmost tooth, finely rugose, with wide, rounded base, and pointed tip (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8I</figureCitation>
). One small, oval adoral shield spine at lateral margin of adoral shield at edge of second tentacle pore (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8I</figureCitation>
).
</paragraph>
<caption doi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155" start="Figure 8" startId="F8">
<paragraph pageId="0" pageNumber="155">
<emphasis bold="true" pageId="0" pageNumber="155">Figure 8.</emphasis>
<taxonomicName authorityName="O'Hara &amp; Stoehr" authorityYear="2006" class="Ophiuroidea" family="Ophiacanthidae" genus="Ophioplinthaca" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ophioplinthaca amezianeae" order="Amphilepidida" pageId="0" pageNumber="155" phylum="Echinodermata" rank="species" species="amezianeae">
<emphasis italics="true" pageId="0" pageNumber="155">Ophioplinthaca amezianeae</emphasis>
</taxonomicName>
<normalizedToken originalValue="OHara">O'Hara</normalizedToken>
&amp;
<normalizedToken originalValue="Stöhr">Stoehr</normalizedToken>
, 2006 (IDSSE-EEB-SW0109)
<emphasis bold="true" pageId="0" pageNumber="155">A</emphasis>
dorsal disc
<emphasis bold="true" pageId="0" pageNumber="155">B</emphasis>
ventral disc
<emphasis bold="true" pageId="0" pageNumber="155">C</emphasis>
center of the disc
<emphasis bold="true" pageId="0" pageNumber="155">D-G</emphasis>
disc spines
<emphasis bold="true" pageId="0" pageNumber="155">H</emphasis>
radial shield
<emphasis bold="true" pageId="0" pageNumber="155">I</emphasis>
oral frame
<emphasis bold="true" pageId="0" pageNumber="155">J</emphasis>
dorsal side of the arm base
<emphasis bold="true" pageId="0" pageNumber="155">K</emphasis>
dorsal arm
<emphasis bold="true" pageId="0" pageNumber="155">L</emphasis>
ventral arm,
<emphasis bold="true" pageId="0" pageNumber="155">M</emphasis>
lateral arm. Abbreviations:
<emphasis bold="true" pageId="0" pageNumber="155">as</emphasis>
adoral shield,
<emphasis bold="true" pageId="0" pageNumber="155">ass</emphasis>
adoral shield spine,
<emphasis bold="true" pageId="0" pageNumber="155">dap</emphasis>
dorsal arm plate,
<emphasis bold="true" pageId="0" pageNumber="155">das</emphasis>
dorsal arm spine,
<emphasis bold="true" pageId="0" pageNumber="155">dp</emphasis>
disc plate,
<emphasis bold="true" pageId="0" pageNumber="155">gs</emphasis>
genital slit,
<emphasis bold="true" pageId="0" pageNumber="155">j</emphasis>
jaw,
<emphasis bold="true" pageId="0" pageNumber="155">lap</emphasis>
lateral arm plate,
<emphasis bold="true" pageId="0" pageNumber="155">m</emphasis>
madreporite,
<emphasis bold="true" pageId="0" pageNumber="155">os</emphasis>
oral shield,
<emphasis bold="true" pageId="0" pageNumber="155">rs</emphasis>
radial shield,
<emphasis bold="true" pageId="0" pageNumber="155">ts</emphasis>
tentacle scale,
<emphasis bold="true" pageId="0" pageNumber="155">vap</emphasis>
ventral arm plate,
<emphasis bold="true" pageId="0" pageNumber="155">vas</emphasis>
ventral arm spine. Scale bars: 2 mm (
<emphasis bold="true" pageId="0" pageNumber="155">A, B</emphasis>
); 1 mm (
<emphasis bold="true" pageId="0" pageNumber="155">H, I, K, M</emphasis>
); 500
<normalizedToken originalValue="µm">µm</normalizedToken>
(
<emphasis bold="true" pageId="0" pageNumber="155">C, J, L</emphasis>
); 200
<normalizedToken originalValue="µm">µm</normalizedToken>
(
<emphasis bold="true" pageId="0" pageNumber="155">D-G</emphasis>
).
</paragraph>
</caption>
<paragraph pageId="0" pageNumber="155">
<emphasis bold="true" pageId="0" pageNumber="155">
<emphasis italics="true" pageId="0" pageNumber="155">Arms</emphasis>
.
</emphasis>
Five slightly moniliform arms, with smooth plates. Dorsal arm plates fan- to bell-shaped, with truncated proximal end on first dorsal arm plate, but following plates with obtuse proximal end, straight to slightly convex proximolateral margins, and convex distal margin (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8J, K</figureCitation>
). Dorsal arm plates at proximal end of arm barely separated, but distally widely separated (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8J, K</figureCitation>
). First ventral arm plate trapezoid, as wide as long, with sunken proximal end, distally connected to second ventral arm plate (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8I</figureCitation>
). Following ventral arm plates twice as wide as long, with obtuse proximal end, straight proximolateral margins, straight lateral angles, straight to slightly wavy distal end, and widely separated (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8L</figureCitation>
). Lateral arm plates meeting above and below. Up to five arm spines: two dorsal spines, three arm segments in length, slender, thorny, laterally compressed with row of tall sharp thorns (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8J-M</figureCitation>
); two ventral spines, two arm segments in length, thick, with blunt tip, rugose, and thorny surface (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8J, K</figureCitation>
). First tentacle pore covered by one or two tentacle scales with rounded base and pointed tip (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8I</figureCitation>
). Following tentacle scales with rounded base, spiniform, pointed tip and covered in irregular thorns, mostly on middle to distal half of arm (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8L</figureCitation>
).
</paragraph>
<paragraph pageId="0" pageNumber="155">
<emphasis bold="true" pageId="0" pageNumber="155">
<emphasis italics="true" pageId="0" pageNumber="155">Color</emphasis>
.
</emphasis>
In live specimen, orange-brown dorsal disc, pale color on arms and ventral disc, arm spines orange, and disc spines red (Fig.
<figureCitation captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A dorsal disc B ventral disc C center of the disc D-G disc spines H radial shield I oral frame J dorsal side of the arm base K dorsal arm L ventral arm, M lateral arm. Abbreviations: as adoral shield, ass adoral shield spine, dap dorsal arm plate, das dorsal arm spine, dp disc plate, gs genital slit, j jaw, lap lateral arm plate, m madreporite, os oral shield, rs radial shield, ts tentacle scale, vap ventral arm plate, vas ventral arm spine. Scale bars: 2 mm (A, B); 1 mm (H, I, K, M); 500 µm (C, J, L); 200 µm (D-G)." figureDoi="10.3897/zookeys.1099.76479.figure8" httpUri="https://binary.pensoft.net/fig/682269" pageId="0" pageNumber="155">8</figureCitation>
).
</paragraph>
<paragraph pageId="0" pageNumber="155">
<emphasis bold="true" pageId="0" pageNumber="155">
<emphasis italics="true" pageId="0" pageNumber="155">Ossicle morphology</emphasis>
.
</emphasis>
Arm spine articulations well developed, four in number, and placed at slight angle to distal edge of lateral arm plate. Volute-shaped perforated lobe forms dorsal and distal part of articulation (Fig.
<figureCitation captionStart="Figure 9" captionStartId="F9" captionText="Figure 9. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A, B lateral arm plate C ventral arm spine D-H vertebrae D proximal view E distal view F ventral view G dorsal view H lateral view. Abbreviations: d dorsal, de depression, dist distal, lac lateral ambulacral canals, mo muscle opening, no nerve opening, pb podial basin, prox proximal, ri ridge, th thorns, v ventral, vs volute-shape. Scale bars: 800 µm (A-E, G, H); 500 µm (F)." figureDoi="10.3897/zookeys.1099.76479.figure9" httpUri="https://binary.pensoft.net/fig/682270" pageId="0" pageNumber="155">9A</figureCitation>
); large muscle opening, small nerve opening (Fig.
<figureCitation captionStart="Figure 9" captionStartId="F9" captionText="Figure 9. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A, B lateral arm plate C ventral arm spine D-H vertebrae D proximal view E distal view F ventral view G dorsal view H lateral view. Abbreviations: d dorsal, de depression, dist distal, lac lateral ambulacral canals, mo muscle opening, no nerve opening, pb podial basin, prox proximal, ri ridge, th thorns, v ventral, vs volute-shape. Scale bars: 800 µm (A-E, G, H); 500 µm (F)." figureDoi="10.3897/zookeys.1099.76479.figure9" httpUri="https://binary.pensoft.net/fig/682270" pageId="0" pageNumber="155">9A</figureCitation>
). Proximal half of lateral arm plate internal surface with continuous ridge and prominent knob close to ventral edge forming vertebral articulation, shaped like a broad, nose-shaped beak (Fig.
<figureCitation captionStart="Figure 9" captionStartId="F9" captionText="Figure 9. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A, B lateral arm plate C ventral arm spine D-H vertebrae D proximal view E distal view F ventral view G dorsal view H lateral view. Abbreviations: d dorsal, de depression, dist distal, lac lateral ambulacral canals, mo muscle opening, no nerve opening, pb podial basin, prox proximal, ri ridge, th thorns, v ventral, vs volute-shape. Scale bars: 800 µm (A-E, G, H); 500 µm (F)." figureDoi="10.3897/zookeys.1099.76479.figure9" httpUri="https://binary.pensoft.net/fig/682270" pageId="0" pageNumber="155">9B</figureCitation>
). Ventral arm spine thorny, with blunt apex, several longitudinal rows of perforations and small thorns (Fig.
<figureCitation captionStart="Figure 9" captionStartId="F9" captionText="Figure 9. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A, B lateral arm plate C ventral arm spine D-H vertebrae D proximal view E distal view F ventral view G dorsal view H lateral view. Abbreviations: d dorsal, de depression, dist distal, lac lateral ambulacral canals, mo muscle opening, no nerve opening, pb podial basin, prox proximal, ri ridge, th thorns, v ventral, vs volute-shape. Scale bars: 800 µm (A-E, G, H); 500 µm (F)." figureDoi="10.3897/zookeys.1099.76479.figure9" httpUri="https://binary.pensoft.net/fig/682270" pageId="0" pageNumber="155">9C</figureCitation>
). Vertebrae with streptospondylous articulation, short, broad podial basin at proximal end, and narrow small distal end (Fig.
<figureCitation captionStart="Figure 9" captionStartId="F9" captionText="Figure 9. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A, B lateral arm plate C ventral arm spine D-H vertebrae D proximal view E distal view F ventral view G dorsal view H lateral view. Abbreviations: d dorsal, de depression, dist distal, lac lateral ambulacral canals, mo muscle opening, no nerve opening, pb podial basin, prox proximal, ri ridge, th thorns, v ventral, vs volute-shape. Scale bars: 800 µm (A-E, G, H); 500 µm (F)." figureDoi="10.3897/zookeys.1099.76479.figure9" httpUri="https://binary.pensoft.net/fig/682270" pageId="0" pageNumber="155">9D-H</figureCitation>
). Dorsal end of vertebrae distally triangular and proximally flattened with longitudinal groove along midline (Fig.
<figureCitation captionStart="Figure 9" captionStartId="F9" captionText="Figure 9. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A, B lateral arm plate C ventral arm spine D-H vertebrae D proximal view E distal view F ventral view G dorsal view H lateral view. Abbreviations: d dorsal, de depression, dist distal, lac lateral ambulacral canals, mo muscle opening, no nerve opening, pb podial basin, prox proximal, ri ridge, th thorns, v ventral, vs volute-shape. Scale bars: 800 µm (A-E, G, H); 500 µm (F)." figureDoi="10.3897/zookeys.1099.76479.figure9" httpUri="https://binary.pensoft.net/fig/682270" pageId="0" pageNumber="155">9D, E</figureCitation>
). Ventral end of vertebrae with broad ambulacral groove with lateral ambulacral canals (Fig.
<figureCitation captionStart="Figure 9" captionStartId="F9" captionText="Figure 9. Ophioplinthaca amezianeae O'Hara &amp; Stoehr, 2006 (IDSSE-EEB-SW 0109) A, B lateral arm plate C ventral arm spine D-H vertebrae D proximal view E distal view F ventral view G dorsal view H lateral view. Abbreviations: d dorsal, de depression, dist distal, lac lateral ambulacral canals, mo muscle opening, no nerve opening, pb podial basin, prox proximal, ri ridge, th thorns, v ventral, vs volute-shape. Scale bars: 800 µm (A-E, G, H); 500 µm (F)." figureDoi="10.3897/zookeys.1099.76479.figure9" httpUri="https://binary.pensoft.net/fig/682270" pageId="0" pageNumber="155">9F-H</figureCitation>
).
</paragraph>
<caption doi="10.3897/zookeys.1099.76479.figure9" httpUri="https://binary.pensoft.net/fig/682270" pageId="0" pageNumber="155" start="Figure 9" startId="F9">
<paragraph pageId="0" pageNumber="155">
<emphasis bold="true" pageId="0" pageNumber="155">Figure 9.</emphasis>
<taxonomicName authorityName="O'Hara &amp; Stoehr" authorityYear="2006" class="Ophiuroidea" family="Ophiacanthidae" genus="Ophioplinthaca" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ophioplinthaca amezianeae" order="Amphilepidida" pageId="0" pageNumber="155" phylum="Echinodermata" rank="species" species="amezianeae">
<emphasis italics="true" pageId="0" pageNumber="155">Ophioplinthaca amezianeae</emphasis>
</taxonomicName>
<normalizedToken originalValue="OHara">O'Hara</normalizedToken>
&amp;
<normalizedToken originalValue="Stöhr">Stoehr</normalizedToken>
, 2006 (IDSSE-EEB-SW0109)
<emphasis bold="true" pageId="0" pageNumber="155">A, B</emphasis>
lateral arm plate
<emphasis bold="true" pageId="0" pageNumber="155">C</emphasis>
ventral arm spine
<emphasis bold="true" pageId="0" pageNumber="155">D-H</emphasis>
vertebrae
<emphasis bold="true" pageId="0" pageNumber="155">D</emphasis>
proximal view
<emphasis bold="true" pageId="0" pageNumber="155">E</emphasis>
distal view
<emphasis bold="true" pageId="0" pageNumber="155">F</emphasis>
ventral view
<emphasis bold="true" pageId="0" pageNumber="155">G</emphasis>
dorsal view
<emphasis bold="true" pageId="0" pageNumber="155">H</emphasis>
lateral view. Abbreviations:
<emphasis bold="true" pageId="0" pageNumber="155">d</emphasis>
dorsal,
<emphasis bold="true" pageId="0" pageNumber="155">de</emphasis>
depression, dist distal,
<emphasis bold="true" pageId="0" pageNumber="155">lac</emphasis>
lateral ambulacral canals,
<emphasis bold="true" pageId="0" pageNumber="155">mo</emphasis>
muscle opening,
<emphasis bold="true" pageId="0" pageNumber="155">no</emphasis>
nerve opening,
<emphasis bold="true" pageId="0" pageNumber="155">pb</emphasis>
podial basin,
<emphasis bold="true" pageId="0" pageNumber="155">prox</emphasis>
proximal,
<emphasis bold="true" pageId="0" pageNumber="155">ri</emphasis>
ridge,
<emphasis bold="true" pageId="0" pageNumber="155">th</emphasis>
thorns,
<emphasis bold="true" pageId="0" pageNumber="155">v</emphasis>
ventral,
<emphasis bold="true" pageId="0" pageNumber="155">vs</emphasis>
volute-shape. Scale bars: 800
<normalizedToken originalValue="µm">µm</normalizedToken>
(
<emphasis bold="true" pageId="0" pageNumber="155">A-E, G, H</emphasis>
); 500
<normalizedToken originalValue="µm">µm</normalizedToken>
(
<emphasis bold="true" pageId="0" pageNumber="155">F</emphasis>
).
</paragraph>
</caption>
</subSubSection>
<subSubSection pageId="0" pageNumber="155" type="distribution">
<paragraph pageId="0" pageNumber="155">Distribution.</paragraph>
<paragraph pageId="0" pageNumber="155">1618-3600 m depth, Southwest of Guam Island, Northwest Pacific, New Caledonia, New Zealand.</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="155" type="remarks">
<paragraph pageId="0" pageNumber="155">Remarks.</paragraph>
<paragraph pageId="0" pageNumber="155">
<taxonomicName authorityName="O'Hara &amp; Stoehr" authorityYear="2006" class="Ophiuroidea" family="Ophiacanthidae" genus="Ophioplinthaca" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ophioplinthaca amezianeae" order="Amphilepidida" pageId="0" pageNumber="155" phylum="Echinodermata" rank="species" species="amezianeae">
<emphasis italics="true" pageId="0" pageNumber="155">Ophioplinthaca amezianeae</emphasis>
</taxonomicName>
was described by
<bibRefCitation author="O'Hara, TD" journalOrPublisher="Acta Oceanologica Sinica" pageId="0" pageNumber="155" publicationUrl="http://cat.inist.fr/?aModele=afficheN&amp;cpsidt=18965845" refId="B41" refString="O'Hara, TD, Stoehr, S, 2006. Deep water Ophiuroidea (Echinodermata) of New Caledonia: Ophiacanthidae and Hemieuryalidae. In: Richer de Forges B et al. (Eds) Tropical Deep-sea Benthos 24. Memoires du Museum national d'Histoire naturelle (1993), 33-141. http://cat.inist.fr/?aModele=afficheN&amp;cpsidt=18965845" title="Deep water Ophiuroidea (Echinodermata) of New Caledonia: Ophiacanthidae and Hemieuryalidae. In: Richer de Forges B et al. (Eds) Tropical Deep-sea Benthos 24. Memoires du Museum national d'Histoire naturelle (1993), 33 - 141." url="http://cat.inist.fr/?aModele=afficheN&amp;cpsidt=18965845" year="2006">
<normalizedToken originalValue="OHara">O'Hara</normalizedToken>
and
<normalizedToken originalValue="Stöhr">Stoehr</normalizedToken>
(2006)
</bibRefCitation>
, and recorded from deep waters in the South Pacific region. It can easily be delimited from most species in the genus
<taxonomicName class="Ophiuroidea" family="Ophiacanthidae" genus="Ophioplinthaca" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ophioplinthaca" order="Amphilepidida" pageId="0" pageNumber="155" phylum="Echinodermata" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="155">Ophioplinthaca</emphasis>
</taxonomicName>
by disc spine, radial shield, and tentacle scale characters (Table
<tableCitation captionStart="Table 3" captionStartId="T3" captionText="Table 3. Tabular key to all species of the genus Ophioplinthaca. Abbreviations: ASE arm segment, ASS Adoral shield spine, DAP dorsal arm plate, DAS dorsal arm spines, L length, LOP lateral oral papillae, VAP ventral arm plate, VAS ventral arm spines, VMT ventralmost tooth, W width." httpUri="http://table.plazi.org/id/9F85B69899787A840F669B2BD815C383" pageId="0" pageNumber="155" tableUuid="9F85B69899787A840F669B2BD815C383">3</tableCitation>
).
</paragraph>
<paragraph pageId="0" pageNumber="155">
<taxonomicName authorityName="O'Hara &amp; Stoehr" authorityYear="2006" class="Ophiuroidea" family="Ophiacanthidae" genus="Ophioplinthaca" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ophioplinthaca amezianeae" order="Amphilepidida" pageId="0" pageNumber="155" phylum="Echinodermata" rank="species" species="amezianeae">
<emphasis italics="true" pageId="0" pageNumber="155">Ophioplinthaca amezianeae</emphasis>
</taxonomicName>
from the present study is similar to the holotype description, but it differs slightly in the disc spine shape and number of arm spines on the lateral arm plate. However, the number of arm spines differs between individuals (6-10 arm spines) according to the description of paratype variations of
<taxonomicName genus="O." lsidName="O. amezianeae" pageId="0" pageNumber="155" rank="species" species="amezianeae">
<emphasis italics="true" pageId="0" pageNumber="155">O. amezianeae</emphasis>
</taxonomicName>
(
<bibRefCitation author="O'Hara, TD" journalOrPublisher="Acta Oceanologica Sinica" pageId="0" pageNumber="155" publicationUrl="http://cat.inist.fr/?aModele=afficheN&amp;cpsidt=18965845" refId="B41" refString="O'Hara, TD, Stoehr, S, 2006. Deep water Ophiuroidea (Echinodermata) of New Caledonia: Ophiacanthidae and Hemieuryalidae. In: Richer de Forges B et al. (Eds) Tropical Deep-sea Benthos 24. Memoires du Museum national d'Histoire naturelle (1993), 33-141. http://cat.inist.fr/?aModele=afficheN&amp;cpsidt=18965845" title="Deep water Ophiuroidea (Echinodermata) of New Caledonia: Ophiacanthidae and Hemieuryalidae. In: Richer de Forges B et al. (Eds) Tropical Deep-sea Benthos 24. Memoires du Museum national d'Histoire naturelle (1993), 33 - 141." url="http://cat.inist.fr/?aModele=afficheN&amp;cpsidt=18965845" year="2006">
<normalizedToken originalValue="OHara">O'Hara</normalizedToken>
and
<normalizedToken originalValue="Stöhr">Stoehr</normalizedToken>
2006
</bibRefCitation>
). The disc spines of our specimen are slightly thicker than in the holotype, but their shape and irregular flanged thorns arising from lateral margins along the spine are similar to the holotype description. The holotype is significantly larger than our specimen (14.5 mm disc diameter), and
<taxonomicName class="Ophiuroidea" family="Ophiacanthidae" genus="Ophioplinthaca" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ophioplinthaca" order="Amphilepidida" pageId="0" pageNumber="155" phylum="Echinodermata" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="155">Ophioplinthaca</emphasis>
</taxonomicName>
species usually show high intraspecific morphological variation. Therefore, a slight difference in disc spine thickness can be considered as intraspecific morphological variation within
<taxonomicName genus="O." lsidName="O. amezianeae" pageId="0" pageNumber="155" rank="species" species="amezianeae">
<emphasis italics="true" pageId="0" pageNumber="155">O. amezianeae</emphasis>
</taxonomicName>
.
</paragraph>
</subSubSection>
</treatment>
</document>