<documentID-CLB-Dataset="55554"ID-DOI="http://dx.doi.org/10.3897/zookeys.1099.76479"ID-GBIF-Dataset="5aac74a0-6137-49b8-bb46-3a39b99b3e7c"ID-PMC="PMC9848918"ID-Pensoft-Pub="1313-2970-1099-155"ID-Pensoft-UUID="2D995654666955B2B228852B9EA78EAC"ID-PubMed="36761443"ID-ZooBank="A963E7C7F1BF4BF2BB4FA0CD5D319691"ModsDocID="1313-2970-1099-155"checkinTime="1652359792651"checkinUser="pensoft"docAuthor="Nethupul, Hasitha, Stoehr, Sabine & Zhang, Haibin"docDate="2022"docId="DAA788C815CD5F71BDF038DAD310C760"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="Ophiophthalmus serratus Nethupul & Stöhr & Zhang 2022, sp. nov."docType="treatment"docUuid="D2B3B231-FCA7-49F9-9696-328B7DD742D5"docUuidSource="ZooBank"docVersion="5"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="1732748171981"updateUser="ExternalLinkService">
<mods:titleid="7BC141543F09751B1ACC59664E671DCF">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:affiliationid="6E86088CF7074D3C33DC5DFFBAF24A18">Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, CAS, 57200 Sanya, China & University of Chinese Academy of Sciences, Beijing 100039, China</mods:affiliation>
<mods:affiliationid="942AF7F1B03E6F6E0915278E0FDEBE4D">Swedish Museum of Natural History, Dept of Zoology, Box 50007, 10405 Stockholm, Sweden</mods:affiliation>
<mods:affiliationid="76722DE8B46820E3EB4FC27EB60B08EE">Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, CAS, 57200 Sanya, China</mods:affiliation>
<taxonomicNameid="F72F26C9DED1C871EF87D10C56FF4F41"LSID="http://zoobank.org/D2B3B231-FCA7-49F9-9696-328B7DD742D5"authority="Nethupul & Stöhr & Zhang, 2022"authorityName="Nethupul & Stöhr & Zhang"authorityYear="2022"class="Ophiuroidea"family="Ophiacanthidae"genus="Ophiophthalmus"higherTaxonomySource="treatment-meta"kingdom="Animalia"lsidName="Ophiophthalmus serratus"order="Amphilepidida"pageId="0"pageNumber="155"phylum="Echinodermata"rank="species"species="serratus"status="sp. nov.">Ophiophthalmus serratus</taxonomicName>
<figureCitationid="194E81CFFDE2F393932F3B7452809DBC"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">Figs 15</figureCitation>
<figureCitationid="1B45340F0B9B57EF6550DDA70C5A9D6A"captionStart="Figure 16"captionStartId="F16"captionText="Figure 16. Ophiophthalmus serratus sp. nov., paratype (IDSSE-EEB-SW 0137) A, B lateral arm plate C dorsal arm spine D ventral arm spine E-J vertebrae E-F proximal view G distal view H ventral view I dorsal view J lateral view. Abbreviations: d dorsal, de depression, dist distal, dl dorsal lobe, lac lateral ambulacral canals, mo muscle opening, no nerve opening, pb podial basin, prox proximal, v ventral, vl ventral lobe. Scale bars: 500 µm (A-C, E-J); 300 µm (D)."figureDoi="10.3897/zookeys.1099.76479.figure16"httpUri="https://binary.pensoft.net/fig/682277"pageId="0"pageNumber="155">, 16</figureCitation>
<figureCitationid="AEF7B2C517F397AF64AC66C67FCAFBF5"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15A</figureCitation>
<figureCitationid="C7CC29DE24282C5495B13F06FD3893D6"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15E</figureCitation>
). Dorsal arm plates triangular to fan-shaped, contiguous on proximal part of arm, then separated. Five finely serrated, arm spines with blunt tip, and one slightly elongated, blunt tipped tentacle scale (Fig.
<figureCitationid="724BD9AAB0AE9726A4272B79CD534D0C"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15F-I</figureCitation>
<taxonomicNameid="0C158F325785B4FCEF7A8201DEC557CF"authorityName="Nethupul & Stöhr & Zhang"authorityYear="2022"class="Ophiuroidea"family="Ophiacanthidae"genus="Ophiophthalmus"kingdom="Animalia"lsidName="Ophiophthalmus serratus"order="Amphilepidida"pageId="0"pageNumber="155"phylum="Echinodermata"rank="species"species="serratus">
<figureCitationid="9D892FD384A198CFDFB6C6957481DB7F"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15</figureCitation>
Disc circular to sub-pentagonal, raised above arm base, and covered by overlapping irregular scales, bearing rounded to cylindrical stumps with blunt tip, and smooth granules (Fig.
<figureCitationid="817F6E394D98E307878C2B2A89D4EA2A"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15A-C</figureCitation>
<figureCitationid="002E4606582377C5ADB9256A0421F4D1"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15C, D</figureCitation>
<figureCitationid="FE5C340F0DD7EFCE0B27547BD9B66131"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15D</figureCitation>
<figureCitationid="2D09662FE2DC0AD514597B2F3F4FEF9D"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15F</figureCitation>
<figureCitationid="7CDBDB22F401164203396D0F9B1E70DC"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15E</figureCitation>
<figureCitationid="F0D3508D5434193CE2FF2D2347D61E01"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15E</figureCitation>
). Oral shield triangular, twice as wide as long (madreporite almost as long as wide), distal end with median lobe, proximal edges straight to slightly concave, and lateral angle connected to first lateral arm plate (Fig.
<figureCitationid="526E48F03965E4B831BFB08E8615F75F"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15E</figureCitation>
<figureCitationid="168468067227BED8D199A9B80144C51F"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15E</figureCitation>
<figureCitationid="A169F2499EA6393496A0F2DB3201700E"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15E</figureCitation>
). Jaw large, as wide as long, with one pointed ventralmost tooth and three elongated, separated, pointed, finely rugose lateral oral papillae, slightly smaller than ventralmost tooth (Fig.
<figureCitationid="A01D52A9A0D961DF79FA691135B1CDB7"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15E</figureCitation>
Dorsal arm plates triangular to fan-shaped, twice as wide as long, distal edge slightly convex, contiguous at proximal end of arm, then separated (Fig.
<figureCitationid="C36DB632A34E02321FDEFBC512EFDD29"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15F-H</figureCitation>
<figureCitationid="28EA44E8D2A0FC302876136DF632A91F"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15I</figureCitation>
<figureCitationid="AEDBFBBAD9FF94749F16CF5BEF392048"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15I</figureCitation>
<figureCitationid="3E6F395903EDAF077DBE90DCA7B7982E"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15J</figureCitation>
<figureCitationid="185166A37C00B371C89B463EF79E83BB"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15I-K</figureCitation>
<figureCitationid="E420EA9C4B765760128600DA5D42DE16"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15G-N</figureCitation>
<figureCitationid="5D99AA5E0030F00B959D8AC9CE038000"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15H, K, N</figureCitation>
<figureCitationid="7502FCDCF7CFECC3440D5E0898E1593F"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15F, L, M</figureCitation>
<figureCitationid="1F95705E21AC1DA2D085F94741564C2B"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15J, L, M</figureCitation>
). Dorsalmost arm spine longest, next two arm spines slightly shorter, but both similar in length, and last two ventral arm spines shortest, also equal in length (Fig.
<figureCitationid="2405BE0DCBE9315970F930B2CE397573"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15L, M</figureCitation>
<figureCitationid="E652CE0CB8CC656F0995C36005ADFEA0"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15K, N</figureCitation>
<figureCitationid="958EBCD34B23BC8F811A3049744735F9"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15I, J</figureCitation>
<figureCitationid="1A1D1228CA7C687ED1185BCD827A1EB3"captionStart="Figure 15"captionStartId="F15"captionText="Figure 15. Ophiophthalmus serratus sp. nov., holotype (IDSSE-EEB-SW 0136) A dorsal disc B ventral disc C center of the disc D radial shield E oral frame dorsal side of the arm base G dorsal arm (proximal half) H dorsal arm (distal half) I ventral side of the arm base J ventral arm (proximal half) K ventral arm (distal half) L lateral arm base M lateral arm (proximal half) N lateral arm (distal half). Abbreviations: ars arm spine, as adoral shield, dap dorsal arm plate, das dorsal arm spine, gra granules, gs genital slit, j jaw, lap lateral arm plate, 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 (D-F, J, L); 500 µm (C, G-I, K, M); 200 µm (N)."figureDoi="10.3897/zookeys.1099.76479.figure15"httpUri="https://binary.pensoft.net/fig/682276"pageId="0"pageNumber="155">15</figureCitation>
IDSSE-EEB-SW0137: Arm spine articulations well developed, five 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, but turns into two unequal subparallel curved lobes ventralwards; large muscle opening and small nerve opening (Fig.
<taxonomicNameid="80BDE646B1206776701DFC4B2615FFA7"authorityName="Nethupul & Stöhr & Zhang"authorityYear="2022"class="Ophiuroidea"family="Ophiacanthidae"genus="Ophiophthalmus"kingdom="Animalia"lsidName="Ophiophthalmus serratus"order="Amphilepidida"pageId="0"pageNumber="155"phylum="Echinodermata"rank="species"species="serratus">
<paragraphid="B5C2848478DCFDD3783D59509A50CCB3"pageId="0"pageNumber="155">Here, we examined 29 paratypes, ranging in disc diameter from 4 mm to 17 mm, and found only few notable variations among them. Large specimens had five arm spines at proximal to middle regions of the arm, then reduced to four arm spines at distal end, but small specimens showed five arm spines only at arm base, then reduced to four along the distal half of the arm. However, the finely serrated surface of the arm spine was similar in both small and large specimens. The number of lateral oral papillae differed from three to four, but most specimens had three papillae. Most specimens had dense granular coverage of the disc except larger specimens (16-17 mm). Color ranges from creamy white to dark among specimens from our collection. The above mentioned variations depend mainly on the size of the disc, and specimens with similar disc diameter showed similar morphological characters.</paragraph>
<taxonomicNameid="C4EF5D8767DABA35DD4FCB38E3C39997"authorityName="Nethupul & Stöhr & Zhang"authorityYear="2022"class="Ophiuroidea"family="Ophiacanthidae"genus="Ophiophthalmus"kingdom="Animalia"lsidName="Ophiophthalmus serratus"order="Amphilepidida"pageId="0"pageNumber="155"phylum="Echinodermata"rank="species"species="serratus">
<taxonomicNameid="D9A4BBBF2C09118FA99E985FB7A5E9F5"authorityName="Nethupul & Stöhr & Zhang"authorityYear="2022"class="Ophiuroidea"family="Ophiacanthidae"genus="Ophiophthalmus"kingdom="Animalia"lsidName="Ophiophthalmus serratus"order="Amphilepidida"pageId="0"pageNumber="155"phylum="Echinodermata"rank="species"species="serratus">
sp. nov. in having similar radial shield and arm plate characters, and granule coverage on the disc, but differs in number of arm spines (up to four), peg-like lateral oral papillae, smooth and slender arm spines, spaced granular coverage, arrangement of arm spines at lateral arm plate, and large oval tentacle scales (
<bibRefCitationid="40B6FBA55FC5774444C7A2CF3BAEF5C5"author="Lyman, T"journalOrPublisher="Bulletin of the Museum of Comparative Zoology"pageId="0"pageNumber="155"publicationUrl="https://www.biodiversitylibrary.org/page/31068674page/27/mode/1up"refId="B31"refString="Lyman, T, 1879. https://www.biodiversitylibrary.org/page/31068674page/27/mode/1up"url="https://www.biodiversitylibrary.org/page/31068674page/27/mode/1up"year="1879">Lyman 1879</bibRefCitation>
<bibRefCitationid="4C97A2458C3A68EC5A47E864FA64EBB4"DOI="https://doi.org/10.5962/bhl.title.32556"author="Clark, HL"journalOrPublisher="Smithsonian Institution United States National Museum Bulletin"pageId="0"pageNumber="155"pagination="1 - 302"refId="B8"refString="Clark, HL, 1911. North Pacific Ophiurans in the collection of the United States National Museum. Smithsonian Institution United States National Museum Bulletin 75: 1 - 302, DOI: https://doi.org/10.5962/bhl.title.32556"title="North Pacific Ophiurans in the collection of the United States National Museum."url="https://doi.org/10.5962/bhl.title.32556"volume="75"year="1911">Clark 1911</bibRefCitation>
<bibRefCitationid="54A5811559C4B5F66C86A8FE3D708539"author="Koehler, R"journalOrPublisher="Bulletin of the American Museum of Natural History"pageId="0"pageNumber="155"pagination="1 - 480"publicationUrl="https://www.biodiversitylibrary.org/item/77301"refId="B22"refString="Koehler, R, 1922. Ophiurans of the Philippine seas and adjacent waters. Bulletin of the American Museum of Natural History 5: 1 - 480, https://www.biodiversitylibrary.org/item/77301"title="Ophiurans of the Philippine seas and adjacent waters."url="https://www.biodiversitylibrary.org/item/77301"volume="5"year="1922">Koehler 1922</bibRefCitation>
<bibRefCitationid="2591418E6B0F8F85272B83E502948F96"author="Liao, Y"journalOrPublisher="Zoology of China Invertebrates"pageId="0"pageNumber="155"pagination="1 - 305"refId="B26"refString="Liao, Y, 2004. Echinodermata: Ophiuroidea. Fauna Sinica. Zoology of China Invertebrates 40: 1 - 305"title="Echinodermata: Ophiuroidea. Fauna Sinica."volume="40"year="2004">Liao 2004</bibRefCitation>
sp. nov. by having similar radial shield and arm plate characters, and granular coverage on the disc, but differs in number of arm spines (up to six or seven), smooth arm spines, and shape of the tentacle scales (H. L.
<bibRefCitationid="6CE044D9AE8229698D6840306CCDC118"DOI="https://doi.org/10.5962/bhl.title.32556"author="Clark, HL"journalOrPublisher="Smithsonian Institution United States National Museum Bulletin"pageId="0"pageNumber="155"pagination="1 - 302"refId="B8"refString="Clark, HL, 1911. North Pacific Ophiurans in the collection of the United States National Museum. Smithsonian Institution United States National Museum Bulletin 75: 1 - 302, DOI: https://doi.org/10.5962/bhl.title.32556"title="North Pacific Ophiurans in the collection of the United States National Museum."url="https://doi.org/10.5962/bhl.title.32556"volume="75"year="1911">Clark 1911</bibRefCitation>
<bibRefCitationid="7ADEB0588F77DB29CB77B0259FE73C66"author="Liao, Y"journalOrPublisher="Zoology of China Invertebrates"pageId="0"pageNumber="155"pagination="1 - 305"refId="B26"refString="Liao, Y, 2004. Echinodermata: Ophiuroidea. Fauna Sinica. Zoology of China Invertebrates 40: 1 - 305"title="Echinodermata: Ophiuroidea. Fauna Sinica."volume="40"year="2004">Liao 2004</bibRefCitation>
sp. nov. by having similar radial shield and arm plate characters, and granular coverage on the disc, but differs in pointed to conical granules, six rough, short, and stout arm spines, and pointed tentacle scales (
<bibRefCitationid="73E038D35C8F1BF16882A69530D3A7DA"DOI="https://doi.org/10.5962/bhl.title.11682"author="Koehler, R"journalOrPublisher="Annales des Sciences Naturelles Zoologie"pageId="0"pageNumber="155"refId="B21"refString="Koehler, R, 1904. Ophiures de l'expedition du Siboga. Part 1. Ophiures de mer profonde. Weber, Siboga Expeditie. MEJ Brill, Leiden 45a: 1-176. https://doi.org/10.5962/bhl.title.11682"title="Ophiures de l'expedition du Siboga. Part 1. Ophiures de mer profonde. Weber, Siboga Expeditie. MEJ Brill, Leiden 45 a: 1 - 176."url="https://doi.org/10.5962/bhl.title.11682"year="1904">Koehler 1904</bibRefCitation>
<bibRefCitationid="36998A1E2543C5F64E73D14E5830EE4F"DOI="https://doi.org/10.5962/bhl.title.32556"author="Clark, HL"journalOrPublisher="Smithsonian Institution United States National Museum Bulletin"pageId="0"pageNumber="155"pagination="1 - 302"refId="B8"refString="Clark, HL, 1911. North Pacific Ophiurans in the collection of the United States National Museum. Smithsonian Institution United States National Museum Bulletin 75: 1 - 302, DOI: https://doi.org/10.5962/bhl.title.32556"title="North Pacific Ophiurans in the collection of the United States National Museum."url="https://doi.org/10.5962/bhl.title.32556"volume="75"year="1911">Clark 1911</bibRefCitation>
sp. nov. by having similar radial shield and oral frame characters, but differs significantly by rough spines on the disc, up to eight arm spines, short genital slits, and narrow, pointed tentacle scales (H. L. Clark, 1911).
