239 lines
30 KiB
XML
239 lines
30 KiB
XML
<document id="00E1AE99DF376D4CFF7E579CB026CB19" ENCODING="UTF-8" ID-GBIF-Dataset="a50cfccd-1c39-4ac9-9396-753573d7e3ac" ModsDocID="z00580p001" checkinTime="1246976621176" checkinUser="thomas" docAuthor="Heok Hee Ng & Heok Hui Tan" docDate="2004" docId="51B6DE4307823F92CE0635105F755F15" docLanguage="en" docName="2004_Ng_Tan_gg1.xml" docOrigin="Zootaxa 580" docSource="http://www.zoobank.org/urn:lsid:zoobank.org:pub:31D7F75E-946F-4C75-8409-FAAFC9BA086F" docTitle="Ompok platyrhynchus Ng & Tan, 2004, sp. nov." docType="treatment" docVersion="13" lastPageNumber="9" masterDocId="71EC95489DF19EE3AB1125CA4538E7FB" masterDocTitle="Ompok platyrhynchus, a new silurid catfish (Teleostei: Siluridae) from Borneo." masterLastPageNumber="11" masterPageNumber="1" pageNumber="2" updateTime="1701314011244" updateUser="plazi">
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<mods:title id="A447CFBA3D5D8ACB3F39CBD548CF49CE">Ompok platyrhynchus, a new silurid catfish (Teleostei: Siluridae) from Borneo.</mods:title>
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</mods:titleInfo>
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<mods:name id="D410441D6E01F06101386A4531650814" type="personal">
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<mods:role id="A8D297F0D4BC39BCDBBC746C93469EA1">
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<mods:roleTerm id="9817C37F096644F4FBD64E1EC2E1D86B">Author</mods:roleTerm>
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</mods:role>
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<mods:namePart id="B6670E6132880AB7727B57A3F66E4ED3">Heok Hee Ng</mods:namePart>
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</mods:name>
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<mods:name id="D6CFD9CB3419AEBAD2798E759980BADB" type="personal">
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<mods:role id="AB683F7AA14CA627B4590332B485BEAD">
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<mods:roleTerm id="6EB1D336A7B95A21F531096C809A9550">Author</mods:roleTerm>
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</mods:role>
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<mods:namePart id="EA03CC49F06395B355B031442A505360">Heok Hui Tan</mods:namePart>
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</mods:name>
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<mods:typeOfResource id="41907B65C156DFCBB7166DF0B845091E">text</mods:typeOfResource>
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<mods:title id="BB9CB37BA5BDC5823BE82F4A57D175C0">Zootaxa</mods:title>
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</mods:titleInfo>
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<mods:part id="4AC1216331E17CCD4D6A6EB6303717AD">
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<mods:date id="782C0AFC67D081D82DA18982B8301F88">2004</mods:date>
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<mods:detail id="C10F2DE862B27D5B2455B55042626F38" type="volume">
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<mods:number id="FDDDC717FF6223DA903C8759B7C608C0">580</mods:number>
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<mods:extent id="587FC5BD8438AB98E9260A6DEAB408E9" unit="page">
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<mods:start id="2B4A99D7938CA4323563E89F6700697E">1</mods:start>
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<mods:end id="73BAD349FA1755111A77E44AE273A7E0">11</mods:end>
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<mods:location id="300D9DDF10DD9100E162E750BB5F89E7">
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<mods:url id="F347A5BA18369E80BF2322C64513C047">http://www.zoobank.org/urn:lsid:zoobank.org:pub:31D7F75E-946F-4C75-8409-FAAFC9BA086F</mods:url>
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</mods:location>
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<mods:classification id="373F16F5281E6DBC72311475FC6912F3">journal article</mods:classification>
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<mods:identifier id="78B13A890FF6D62ECE0ECAD620BF193D" type="Plazi-Custom">z00580p001</mods:identifier>
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<treatment id="51B6DE4307823F92CE0635105F755F15" ID-DOI="http://doi.org/10.5281/zenodo.6270307" ID-GBIF-Taxon="100124525" ID-Zenodo-Dep="6270307" LSID="urn:lsid:plazi:treatment:51B6DE4307823F92CE0635105F755F15" httpUri="http://treatment.plazi.org/id/51B6DE4307823F92CE0635105F755F15" lastPageNumber="9" pageNumber="2">
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<subSubSection id="6279D598C1E0AF9857A460C8911E1502" type="nomenclature">
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<paragraph id="CDB3173E369AD2E9947A739D522A3DBA" pageNumber="2">
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<taxonomicName id="F999B3614CA08A65DDDB897729871372" ID-CoL="49FCN" LSID-ZBK="urn:lsid:zoobank.org:act:7A480035-04A3-400A-AF4F-93FB5DDB0F5A" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok platyrhynchus Ng & Tan 2004:2" order="Siluriformes" pageNumber="2" phylum="Chordata" rank="species" species="platyrhynchus">Ompok platyrhynchus</taxonomicName>
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<taxonomicNameLabel id="82778743472D8FCE45E201ECB76D44B6" rank="species">sp. nov.</taxonomicNameLabel>
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</paragraph>
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</subSubSection>
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<subSubSection id="F75B5B02FEE131907F569CDC53599198" type="description">
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<paragraph id="5A784C43E5DBD4A3CBC62A555F7B5D79" pageNumber="2">(Figs. 1 & 2a)</paragraph>
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</subSubSection>
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<subSubSection id="BA37629E7BC3E974E4D54AD8969A8266" type="reference_group">
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<paragraph id="78046AE916C240F715BFFCE9D96DF306" pageNumber="2">
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<taxonomicName id="11C5765B267AEEB4FA0FF4F24063F81F" LSID-ZBK="urn:lsid:zoobank.org:act:06F182DC-32CE-4580-8C5A-00F46E77E0CF" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok Lacépède 1803:49" order="Siluriformes" pageNumber="2" phylum="Chordata" rank="genus">Ompok</taxonomicName>
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sp. Choy & Chin, 1994: 769.
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</paragraph>
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</subSubSection>
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<subSubSection id="830F9A7255E625019687FC8876E716AF" type="nomenclature">
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<paragraph id="9305CEC13135B839C141D5EDA50DEB94" pageNumber="2">
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<materialsCitation id="3FD0BF12511593CD94BB8A949266C9B4" ID-GBIF-Occurrence="923901701" country="Brunei Darussalam" stateProvince="Temburong District">
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Type material.
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<typeStatus id="01010847FF41163D085E15EA2DB9D1A3">Holotype</typeStatus>
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:
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<collectionCode id="B51EA8BA774DD014169C80D4B12B2C6C" collectionName="Singapore, National University of Singapore, Raffles Museum of Biodiversity Research, Zoological Reference Collection">ZRC</collectionCode>
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48678, male, 78.9 mm SL; Borneo:
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<collectingCountry id="106EBDFD80203EB094251ACFD6D698DC">Brunei Darussalam</collectingCountry>
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,
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<collectingRegion id="F2D37889B418DDE7AEBCB2EE663B281A">Temburong district</collectingRegion>
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: Temburong basin, Belalong sub-basin; Sungai Esu, about 15 minutes upstream of Kuala Belalong Field Studies Centre (
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<geoCoordinate id="18DA68FD6FDC7D0611248477A9967EBD" direction="north" orientation="latitude" value="4.5383058">04°32'17.9"N</geoCoordinate>
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<geoCoordinate id="73BDCF656368232F187AD42317E0BBAE" direction="east" orientation="longitude" value="115.15978">115°09'35.2"E</geoCoordinate>
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); H. H. Tan & K. K. P. Lim,
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<date id="CD6099A3BA4D000C600F8AE5C88821DF" day="06" month="10" value="2001-10-06" year="2001">6 Oct 2001</date>
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.
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</materialsCitation>
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</paragraph>
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<paragraph id="A3F70586349936190DFE60FF6CC089CE" pageNumber="2">
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<materialsCitation id="9D3EFDDE101F25C828AD5B4885E0E1DA" ID-GBIF-Occurrence="923901707" country="Brunei Darussalam" stateProvince="Temburong District">
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<typeStatus id="3348DE11A6200972604F3E68933BA024">Paratype</typeStatus>
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:
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<collectionCode id="9DBE61A68F18069B4F5555787BC4956E" collectionName="Singapore, National University of Singapore, Raffles Museum of Biodiversity Research, Zoological Reference Collection">ZRC</collectionCode>
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31807, cleared and stained, 55.0 mm SL; Borneo:
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<collectingCountry id="EEF37229C662636130247CDB7F05659D">Brunei Darussalam</collectingCountry>
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,
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<collectingRegion id="C810080E673391B8363E1DD670240AAC">Temburong District</collectingRegion>
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, Sungai Belalong at Kuala Belalong Field Study Center; S. C. Choy,
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<date id="4DC274897909AB17C9D10BD51CD27058" day="27" month="07" value="1992-07-27" year="1992">27 July 1992</date>
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.
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</materialsCitation>
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</paragraph>
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</subSubSection>
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<subSubSection id="D9A8DC136907BE29B3B2FE65BF592857" type="diagnosis">
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<paragraph id="AB538015F3EC083520376E1F90AD2C81" pageNumber="2">
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Diagnosis.
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<taxonomicName id="365DA6A43ED645E62F41A666AC98DDFC" LSID-ZBK="urn:lsid:zoobank.org:act:7A480035-04A3-400A-AF4F-93FB5DDB0F5A" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok platyrhynchus Ng & Tan 2004:2" order="Siluriformes" pageNumber="2" phylum="Chordata" rank="species" species="platyrhynchus">Ompok platyrhynchus</taxonomicName>
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can be distinguished from all Southeast Asian congeners, except for
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<taxonomicName id="E6BDB22F9C12CC5F397F5FDA33E9515F" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="2" phylum="Chordata" rank="species" species="hypophthalmus">O. hypophthalmus</taxonomicName>
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,
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<taxonomicName id="4A1A64368D3EB30170F0540B85D95650" LSID-ZBK="urn:lsid:zoobank.org:act:2E636FB9-9BF7-4DF3-A8F2-0BEF29535006" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok rhadinurus Ng 2003:1299" order="Siluriformes" pageNumber="2" phylum="Chordata" rank="species" species="rhadinurus">O. rhadinurus</taxonomicName>
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and
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<taxonomicName id="2298B7DF10CDD4313F6D6B579AE17639" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="2" phylum="Chordata" rank="species" species="urbaini">O. urbaini</taxonomicName>
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, in having 74-80 (vs. 40-70) anal-fin rays.
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<taxonomicName id="0E62C2549B81DD3C9C69571416125094" LSID-ZBK="urn:lsid:zoobank.org:act:7A480035-04A3-400A-AF4F-93FB5DDB0F5A" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok platyrhynchus Ng & Tan 2004:2" order="Siluriformes" pageNumber="2" phylum="Chordata" rank="species" species="platyrhynchus">Ompok platyrhynchus</taxonomicName>
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differs from
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<taxonomicName id="58DEB604A2D95A4F8EE3551591DCE1CD" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="2" phylum="Chordata" rank="species" species="hypophthalmus">O. hypophthalmus</taxonomicName>
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,
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<taxonomicName id="CA9865A9DD6FEB7D508B1981ED4881B5" LSID-ZBK="urn:lsid:zoobank.org:act:2E636FB9-9BF7-4DF3-A8F2-0BEF29535006" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok rhadinurus Ng 2003:1299" order="Siluriformes" pageNumber="2" phylum="Chordata" rank="species" species="rhadinurus">O. rhadinurus</taxonomicName>
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and
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<taxonomicName id="8CE7E42D9E530FE1C7201BFC9EA8A686" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="2" phylum="Chordata" rank="species" species="urbaini">O. urbaini</taxonomicName>
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in lacking a distinct nuchal concavity (Fig. 2), and having a more slender body (13.5-17.7% SL vs. 18.9-24.5), shorter snout (37.1-38.1% HL vs. 39.4-47.5) and maxillary barbels (reaching to middle of pectoral fin vs. reaching to anterior third of anal fin), and more vertebrae (59-60 vs. 47-58).
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</paragraph>
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</subSubSection>
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<subSubSection id="763E1E5DF04E33CB48F7C52B50BAB987" type="description">
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<paragraph id="54368B705626EF0CE1C7397E4F408A32" pageNumber="2">Description. Biometric data in Table 1. Body laterally compressed; maximum body depth located at pelvic-fin origin; head as broad as body and depressed. Dorsal profile of body gently convex.</paragraph>
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<paragraph id="0848516B54C7A0498C95BE60880B2D01" pageNumber="2">Anterior profile of snout rounded. Anterior pair of nostrils tubular and anteromedial to maxillary barbel base. Posterior pair of nostrils bordered by fleshy dorsal and ventral membranes and posteromedial to maxillary barbel base.</paragraph>
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<paragraph id="8C407A472C72D26F17E7F6AC257A52BD" pageNumber="4">Mouth terminal; gape horizontal, small and extending halfway between maxillary barbel base and anterior orbital margin. Well-developed rictal lobes present, subtended by deep submandibular groove; upper rictal lobe without skin fold. Thin, broad supralabial fold extending from below orbit to maxillary barbel base.</paragraph>
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<paragraph id="336116FF65CF192EA91E737D076E6574" pageNumber="4">Jaw teeth depressible and villiform. Premaxillary teeth in 4-5 irregular rows in narrow, gently curved rectangular bands. Dentary teeth in similar, slightly narrower bands narrowing posterolaterally, reaching from symphysis almost to mouth corners. First row of dentary teeth slightly visible when mouth is closed. Vomerine teeth in 2-3 rows in single ovoid patch straddling midline.</paragraph>
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<paragraph id="BD3A6D6617FB5198140A56539FAFF7ED" pageNumber="4">Two pairs of barbels, slightly flattened along entire length. Maxillary barbels reaching to middle of pectoral fin. Mandibular barbels (only outer pair present) reaching just beyond head. Eyes small, subcutaneous (without free orbital margin); located approximately midway on head and immediately behind supralabial fold. Dorsal orbital margin just visible dorsally; ventral quarter of orbital margin visible ventrally.</paragraph>
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<paragraph id="0F378DD10C8E73C07BAC0187F6CC54C7" pageNumber="4">Gill membranes separate and overlapping, free from isthmus; gular fold well-developed and v-shaped. Branchiostegal rays 10 (1) or 11* (1). Gill rakers long and thin; anteriormost rakers on lower first arch widely spaced; 4+13 (1) or 4+14* (1).</paragraph>
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</subSubSection>
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<subSubSection id="A9DDED9A268C6283F1381416DE653A18" type="description">
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<paragraph id="2EC4E378B150664E063D2DC295F20EB0" pageNumber="5">Dorsal fin small, with i,1 (2) rays. Depressed pectoral fin to origin of anal fin; distal margin broadly convex, with rounded tip. Third branched pectoral ray longest and fin with 10 (1) or 14* (1) rays. Proximal two-thirds of first pectoral-fin element co-ossified into a slender spine. Spine with shallow oblique striae on dorsal and ventral surfaces and with 5 serrations on posterior edge spanning the distal end of the ossified and proximal end of the flexible distal tip. Axillary pore small, located just above pectoral spine base. Depressed pelvic fin reaching to second or third anal-fin ray; distal margin convex with i,7 (2) rays. Distal margin of anal fin straight, with 74* (1) or 80 (1) rays; separate from caudal fin. Integument over anal fin thickened proximally for two thirds of ray lengths; finray erector muscles attaching to base of fin rays, ventralmost extent of muscles defined by area of thickened integument. Caudal peduncle slender. Caudal fin deeply forked, lobes elongate and with rounded tips; upper lobe slightly longer; principal rays i,7,8,i (2).</paragraph>
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<paragraph id="8C3722A17C6740108709388566F81DE3" pageNumber="5">Lateral line complete, extending to middle of caudal-fin base, with short branches along flanks directed posteroventrally. Urogenital papilla located immediately posterior to insertion of pelvic fin. Vertebrae 13+46=59 or 14+46=60*.</paragraph>
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<paragraph id="A39891CCE966012AD2403453FDB7A6EF" pageNumber="5">Coloration. In 70% ethanol: Body and head cream and diffusely pigmented. Light powdering of melanophores on all surfaces of head and body imparting a grayish color, somewhat less dense on belly and ventral surface of head. All fin rays with a light powdering of melanophores; fin membranes hyaline. Barbels with melanophores on dorsal half; ventral half unpigmented.</paragraph>
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<paragraph id="7F6D1B0150AC158182A8C23A8347CCF6" pageNumber="5">Color in life translucent (Fig. 1b)</paragraph>
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</subSubSection>
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<subSubSection id="6E25513C621A2CA26021EBD0BE2CB486" type="distribution">
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<paragraph id="968F08E766C3EEF1CCE1E3F3BE5C5BBD" pageNumber="5">Distribution. Known from the Temburong River drainage in northern Borneo (Fig. 3).</paragraph>
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</subSubSection>
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<subSubSection id="DB064027888EABFB23D0BDE3D9BEF9F6" type="biology_ecology">
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<paragraph id="2057F3FC84C86ECDBD2A57AAFE15F41B" pageNumber="5">
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Habitat. The
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<typeStatus id="EBE0157F065C636FFCB07A4190F19DA8">holotype</typeStatus>
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of
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<taxonomicName id="4D4CBF396EB0256C8E4BF4DE9D66B276" LSID-ZBK="urn:lsid:zoobank.org:act:7A480035-04A3-400A-AF4F-93FB5DDB0F5A" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok platyrhynchus Ng & Tan 2004:2" order="Siluriformes" pageNumber="5" phylum="Chordata" rank="species" species="platyrhynchus">O. platyrhynchus</taxonomicName>
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was obtained from a small meandering stream about 3 meters at its widest and up to 1 meter deep. The water was clear and fast flowing over a rock and sand substratum, at parts bedrock that split the stratum and formed small cascades up to 3 meters high (Fig. 4). Syntopic fish collected include:
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<taxonomicName id="97FC604666F3C85399AE46B1B9CFE52A" family="Cyprinidae" genus="Hampala" higherTaxonomySource="CoL" kingdom="Animalia" order="Cypriniformes" pageNumber="5" phylum="Chordata" rank="species" species="bimaculata">Hampala bimaculata</taxonomicName>
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,
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<taxonomicName id="F5C582C36D1FAF15A429DE58D5D2042F" LSID-ZBK="urn:lsid:zoobank.org:act:16F97B18-9717-4EF0-9758-2D1738FBC87E" family="Cyprinidae" genus="Nematabramis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Nematabramis steindachnerii Popta 1905:179" order="Cypriniformes" pageNumber="5" phylum="Chordata" rank="species" species="steindachneri">Nematabramis steindachneri</taxonomicName>
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,
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<taxonomicName id="C2F869F8B0047F06E45346C9CE1217F0" LSID-ZBK="urn:lsid:zoobank.org:act:C5187A91-120A-4C38-AC7F-9846F5D595A5" family="Cyprinidae" genus="Paracrossochilus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Paracrossochilus acerus Inger & Chin 1962:100" order="Cypriniformes" pageNumber="5" phylum="Chordata" rank="species" species="acerus">Paracrossochilus acerus</taxonomicName>
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,
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<taxonomicName id="F7475917021360FDA12542C6E18C1775" family="Cyprinidae" genus="Rasbora" higherTaxonomySource="CoL" kingdom="Animalia" order="Cypriniformes" pageNumber="5" phylum="Chordata" rank="species" species="agyrotaenia">Rasbora agyrotaenia</taxonomicName>
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,
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<taxonomicName id="7BD2D65656A86B2CF4CBEC416D39691E" family="Cyprinidae" genus="Tor" higherTaxonomySource="CoL" kingdom="Animalia" order="Cypriniformes" pageNumber="5" phylum="Chordata" rank="species" species="tambra">Tor tambra</taxonomicName>
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(Cyprinidae),
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<taxonomicName id="77FC25DE6D4D6C0828A8B214202A5300" LSID-ZBK="urn:lsid:zoobank.org:act:128A48B5-E251-4289-BC06-994D77D19623" family="Balitoridae" genus="Gastromyzon" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Gastromyzon lepidogaster Roberts 1982:509" order="Cypriniformes" pageNumber="5" phylum="Chordata" rank="species" species="lepidogaster">Gastromyzon lepidogaster</taxonomicName>
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,
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<taxonomicName id="A9E799880FEB83485F95710BAD1A67C5" LSID-ZBK="urn:lsid:zoobank.org:act:61CA7DD9-F636-4EE4-AD80-CC42AA7AE7FB" family="Balitoridae" genus="Neogastromyzon" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Neogastromyzon Popta 1905:180" order="Cypriniformes" pageNumber="5" phylum="Chordata" rank="genus">Neogastromyzon</taxonomicName>
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sp.,
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<taxonomicName id="1FAA927688FB35F4834E25423E703D2B" family="Balitoridae" genus="Parhomaloptera" higherTaxonomySource="CoL" kingdom="Animalia" order="Cypriniformes" pageNumber="5" phylum="Chordata" rank="species" species="microstoma">Parhomaloptera microstoma</taxonomicName>
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,
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<taxonomicName id="E6385178369CEA90AA12F0D931B5F914" LSID-ZBK="urn:lsid:zoobank.org:act:85281969-A458-41C1-8DA0-6AE6E7211322" family="Balitoridae" genus="Protomyzon" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Protomyzon Hora 1932:306" order="Cypriniformes" pageNumber="5" phylum="Chordata" rank="genus">Protomyzon</taxonomicName>
|
|
sp. (Balitoridae),
|
|
<taxonomicName id="82FDF34C5FA8FA51697974FADF818228" family="Cobitidae" genus="Pangio" higherTaxonomySource="CoL" kingdom="Animalia" order="Cypriniformes" pageNumber="5" phylum="Chordata" rank="species" species="mariarum">Pangio cf. mariarum</taxonomicName>
|
|
(Cobitidae),
|
|
<taxonomicName id="4D3035ABAFB8C46CCB83BA3574D9610E" family="Bagridae" genus="Hemibagrus" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="5" phylum="Chordata" rank="species" species="baramensis">Hemibagrus baramensis</taxonomicName>
|
|
(Bagridae),
|
|
<taxonomicName id="FBD2E231FF1F707BDAD1252E23049F3A" family="Siluridae" genus="Pterocryptis" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="5" phylum="Chordata" rank="species" species="furnessi">Pterocryptis furnessi</taxonomicName>
|
|
(Siluridae) and
|
|
<taxonomicName id="FD6FFC184BD64CEEFB1C349E2AD13049" family="Mastacembelidae" genus="Macrognathus" higherTaxonomySource="CoL" kingdom="Animalia" order="Synbranchiformes" pageNumber="5" phylum="Chordata" rank="species" species="maculatus">Macrognathus maculatus</taxonomicName>
|
|
(Mastacembelidae).
|
|
</paragraph>
|
|
</subSubSection>
|
|
<subSubSection id="6E800DBC085CF69882D705AE8852B2F6" type="etymology">
|
|
<paragraph id="C3963306258EB64B4B0CDB9F440E96A4" pageNumber="5">Etymology. From the Greek platys, meaning flat, and rhynchos, meaning nose; in reference to the lack of a distinct nuchal concavity in this species. Used as a noun.</paragraph>
|
|
</subSubSection>
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|
<subSubSection id="7C23BD9C7C6FC18C2A6927C7AE9FF275" type="discussion">
|
|
<paragraph id="730E8FE77CE64B569084CEE80BCE9B02" pageNumber="6">Discussion</paragraph>
|
|
<paragraph id="A1E58BF6466E91F6B64FA8D6721F4394" pageNumber="6">
|
|
The highly elevated anal-fin ray counts of
|
|
<taxonomicName id="6BD4B32B8FBC56F918C3776FE3CCB805" LSID-ZBK="urn:lsid:zoobank.org:act:7A480035-04A3-400A-AF4F-93FB5DDB0F5A" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok platyrhynchus Ng & Tan 2004:2" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="platyrhynchus">O. platyrhynchus</taxonomicName>
|
|
easily distinguishes it from other species of Southeast Asian
|
|
<taxonomicName id="C548D3C102586E2B32C1D1EBE63A7C27" LSID-ZBK="urn:lsid:zoobank.org:act:06F182DC-32CE-4580-8C5A-00F46E77E0CF" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok Lacépède 1803:49" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="genus">Ompok</taxonomicName>
|
|
, except for
|
|
<taxonomicName id="CD44E123EF2B50B1AB20C1801CE25DC7" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="hypophthalmus">O. hypophthalmus</taxonomicName>
|
|
,
|
|
<taxonomicName id="AD71541C8101E12F6BF80C59ACABC63C" LSID-ZBK="urn:lsid:zoobank.org:act:2E636FB9-9BF7-4DF3-A8F2-0BEF29535006" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok rhadinurus Ng 2003:1299" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="rhadinurus">O. rhadinurus</taxonomicName>
|
|
and
|
|
<taxonomicName id="D5DE2FD4D1FCCE0758166BDF6CBAD895" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="urbaini">O. urbaini</taxonomicName>
|
|
(Table 2).
|
|
</paragraph>
|
|
<paragraph id="E97288A888FF3EAD93B12B5929B3A94F" lastPageNumber="7" pageNumber="6">
|
|
The biometric differences between
|
|
<taxonomicName id="F016A9D3E40BB9099549EBDE80741CA8" LSID-ZBK="urn:lsid:zoobank.org:act:7A480035-04A3-400A-AF4F-93FB5DDB0F5A" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok platyrhynchus Ng & Tan 2004:2" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="platyrhynchus">O. platyrhynchus</taxonomicName>
|
|
and members of the
|
|
<taxonomicName id="A39336E754916BF473BD8A9E153D3882" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="hypophthalmus">O. hypophthalmus species group</taxonomicName>
|
|
are summarized in Table 3. The differences observed in the body depth and snout length between
|
|
<taxonomicName id="EC1CE62112B44BC5269566792C52F6DE" LSID-ZBK="urn:lsid:zoobank.org:act:7A480035-04A3-400A-AF4F-93FB5DDB0F5A" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok platyrhynchus Ng & Tan 2004:2" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="platyrhynchus">O. platyrhynchus</taxonomicName>
|
|
and
|
|
<taxonomicName id="E19BB08F4C89ADF0AD8381F2E90BE5E0" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="hypophthalmus">O. hypophthalmus</taxonomicName>
|
|
,
|
|
<taxonomicName id="E6A39505D63B50C254153E6FB85F2277" LSID-ZBK="urn:lsid:zoobank.org:act:2E636FB9-9BF7-4DF3-A8F2-0BEF29535006" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok rhadinurus Ng 2003:1299" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="rhadinurus">O. rhadinurus</taxonomicName>
|
|
and
|
|
<taxonomicName id="B21F4AEB8036FC248695ADCFABDE7A8C" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="urbaini">O. urbaini</taxonomicName>
|
|
are not solely due to ontogeny. A bivariate analysis (ANCOVA) shows that the regression lines of the body depth (Fig. 5a) and snout length (Fig. 5b) on SL are significantly different (with P=0.0137, P<0.0001, and P=0.011 for body depths of
|
|
<taxonomicName id="5CB081E17836287DED2DB75ACA1FC3CD" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="hypophthalmus">O. hypophthalmus</taxonomicName>
|
|
,
|
|
<taxonomicName id="C6C48B2F5A5258A3C22F8CF999A4B405" LSID-ZBK="urn:lsid:zoobank.org:act:2E636FB9-9BF7-4DF3-A8F2-0BEF29535006" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok rhadinurus Ng 2003:1299" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="rhadinurus">O. rhadinurus</taxonomicName>
|
|
and
|
|
<taxonomicName id="EC5F8A12D6F913E098992DCD6B32C80E" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="urbaini">O. urbaini</taxonomicName>
|
|
respectively and P=0.034, P=0.0347, and P<0.0001 for snout lengths of
|
|
<taxonomicName id="FB9287D612E4AD0C07C9F317289D0657" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="hypophthalmus">O. hypophthalmus</taxonomicName>
|
|
,
|
|
<taxonomicName id="42B108C725FD43BBF16D646DAD03A9F7" LSID-ZBK="urn:lsid:zoobank.org:act:2E636FB9-9BF7-4DF3-A8F2-0BEF29535006" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok rhadinurus Ng 2003:1299" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="rhadinurus">O. rhadinurus</taxonomicName>
|
|
and
|
|
<taxonomicName id="4B35FEF95E33AC81569CD04FEB86035C" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="urbaini">O. urbaini</taxonomicName>
|
|
respectively).
|
|
</paragraph>
|
|
</subSubSection>
|
|
<subSubSection id="B65537DC2B4E2D42F12B6607696F1B8C" type="discussion">
|
|
<paragraph id="B04FA1ACD8A93AA40630CDE0D0C8E6F3" pageNumber="9">
|
|
Steindachner (1901) described
|
|
<taxonomicName id="0F6F05B379F0A38426C17CB1A07114D4" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="9" phylum="Chordata" rank="species" species="borneensis">Ompok borneensis</taxonomicName>
|
|
from the Baram River. The species is known only from the
|
|
<typeStatus id="8D032084727BF07F7DCB57ECCBEB8944">holotype</typeStatus>
|
|
whose current disposition is unknown. Because of the similarity in the freshwater ichthyofauna of the Temburong and Baram River drainages, some comments on the identity of
|
|
<taxonomicName id="73BD1457AFC1D790D3E13FBB3E9BC83A" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="9" phylum="Chordata" rank="species" species="borneensis">O. borneensis</taxonomicName>
|
|
and more detailed comparison with
|
|
<taxonomicName id="FC68E00E294F35E63A9FBDDCF2CAC793" LSID-ZBK="urn:lsid:zoobank.org:act:7A480035-04A3-400A-AF4F-93FB5DDB0F5A" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok platyrhynchus Ng & Tan 2004:2" order="Siluriformes" pageNumber="9" phylum="Chordata" rank="species" species="platyrhynchus">O. platyrhynchus</taxonomicName>
|
|
is necessary.
|
|
<taxonomicName id="67E2240F07F090D37D6FEB1A8C35EFC9" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="9" phylum="Chordata" rank="species" species="borneensis">Ompok borneensis</taxonomicName>
|
|
is treated as a senior synonym of
|
|
<taxonomicName id="B3B0F3EB89A3539D3FB6AB75B9AEF802" LSID-ZBK="urn:lsid:zoobank.org:act:1E65F4D5-D283-431C-93FD-7EB8403495A8" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok jaynei Fowler 1905:466" order="Siluriformes" pageNumber="9" phylum="Chordata" rank="species" species="jaynei">Ompok jaynei Fowler, 1905</taxonomicName>
|
|
here. Steindachner (1901) noted that the two median caudal-fin rays were shorter and thinner than the ones immediately adjacent to it (“Die mittleren 2 caudalstrahlen sind bedeutend
|
|
<normalizedToken id="90F2B0EF9F8CF7676883222057F1D2E9" originalValue="kürzer">kuerzer</normalizedToken>
|
|
und zarter als die nahe gelegenen
|
|
<normalizedToken id="4292625C555EB427518969FC3B6B3A8C" originalValue="längsten">laengsten</normalizedToken>
|
|
strahlen der flosse.”), implying that the caudal fin is forked, and not rounded as illustrated in the original description (Steindachner, 1901: Pl. 18 Fig. 3). The caudal-fin shape, its confluence with the anal fin, the anal-fin ray count (Table 2) and the coloration (dark brown), indicate that
|
|
<taxonomicName id="BA3BCD762EBC9AADD73CB4713A7A33D2" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="9" phylum="Chordata" rank="species" species="borneensis">O. borneensis</taxonomicName>
|
|
is almost certainly conspecific with
|
|
<taxonomicName id="08F3EA62DF9384C6FF350B9B7D169684" LSID-ZBK="urn:lsid:zoobank.org:act:1E65F4D5-D283-431C-93FD-7EB8403495A8" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok jaynei Fowler 1905:466" order="Siluriformes" pageNumber="9" phylum="Chordata" rank="species" species="jaynei">O. jaynei</taxonomicName>
|
|
(also described from the Baram River). In addition to the more numerous anal-fin rays of
|
|
<taxonomicName id="787192DD045E886829B834C756F7E6E5" LSID-ZBK="urn:lsid:zoobank.org:act:7A480035-04A3-400A-AF4F-93FB5DDB0F5A" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Ompok platyrhynchus Ng & Tan 2004:2" order="Siluriformes" pageNumber="9" phylum="Chordata" rank="species" species="platyrhynchus">O. platyrhynchus</taxonomicName>
|
|
compared to
|
|
<taxonomicName id="E22587C4BF64DAFC037B7047312F0DE5" family="Siluridae" genus="Ompok" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="9" phylum="Chordata" rank="species" species="borneensis">O. borneensis</taxonomicName>
|
|
(Table 2), the former species also has fewer dorsal-fin rays (2 vs. 4).
|
|
</paragraph>
|
|
</subSubSection>
|
|
</treatment>
|
|
</document> |