146 lines
20 KiB
XML
146 lines
20 KiB
XML
<document id="AC58171FBDB3BED861EDE31AC74AD07C" ENCODING="UTF-8" ID-GBIF-Dataset="213c47b5-b002-44dc-9779-6cdc8449ded3" ModsDocID="z00398p001" checkinTime="1246976874913" checkinUser="thomas" docAuthor="Heok Hee Ng" docDate="2004" docId="94BB14AC19093AEF8CC970372DE8DFFB" docLanguage="en" docName="2004_Ng4_gg2.xml" docOrigin="Zootaxa 398" docSource="http://www.zoobank.org/urn:lsid:zoobank.org:pub:43336C62-56F7-46AF-B327-11876818C230" docTitle="Kryptopterus platypogon Ng, 2004, sp. nov." docType="treatment" docVersion="13" lastPageNumber="6" masterDocId="3724A493F248193977507805BCB0E5FE" masterDocTitle="Kryptopterus platypogon, a new silurid catfish (Teleostei: Siluridae) from Borneo." masterLastPageNumber="8" masterPageNumber="1" pageNumber="2" updateTime="1701313929077" updateUser="plazi">
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<mods:title id="F5324C5A21765A38BD14E5025B3A5A0C">Kryptopterus platypogon, a new silurid catfish (Teleostei: Siluridae) from Borneo.</mods:title>
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<mods:name id="6732439D98B7F52A216C84306FEF3CE2" type="personal">
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<mods:namePart id="6A13514784EC402F28842469E24556D5">Heok Hee Ng</mods:namePart>
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<mods:typeOfResource id="0949D77E403D416BF260E124AF9833DB">text</mods:typeOfResource>
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<mods:title id="23269878C7E73F23E0E6E117B08BE681">Zootaxa</mods:title>
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<mods:part id="BCFAFF27A664C90917BCC42C6050576F">
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<mods:date id="B81DB40A530B66AB519A5983D17EEA8B">2004</mods:date>
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<mods:detail id="8FEB884525D2BAFE8D93B552820FBF3C" type="volume">
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<mods:number id="CAB8061E76E96FFB50B8A369D7F01D84">398</mods:number>
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<mods:start id="259563709FD708E08667DA404C6F8EAD">1</mods:start>
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<mods:location id="9C6784526AA6EC8090A48B37FDBA871A">
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<mods:url id="8EDD5A9864D3FDB83BB1B5BE444D2447">http://www.zoobank.org/urn:lsid:zoobank.org:pub:43336C62-56F7-46AF-B327-11876818C230</mods:url>
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</mods:location>
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<mods:classification id="CAFEE64B4A595DF54132F60ACE072304">journal article</mods:classification>
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<mods:identifier id="54E3582DE0184FEE5ED7E70C541B1F80" type="Plazi-Custom">z00398p001</mods:identifier>
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<treatment id="94BB14AC19093AEF8CC970372DE8DFFB" ID-DOI="http://doi.org/10.5281/zenodo.6269474" ID-GBIF-Taxon="100124309" ID-Zenodo-Dep="6269474" LSID="urn:lsid:plazi:treatment:94BB14AC19093AEF8CC970372DE8DFFB" httpUri="http://treatment.plazi.org/id/94BB14AC19093AEF8CC970372DE8DFFB" lastPageNumber="6" pageNumber="2">
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<subSubSection id="8CBC6C0B59FA0AD513C40F0FA6B2C6EC" type="nomenclature">
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<paragraph id="1B0CAE5E16551B56ED355D2F04DA9F1B" pageNumber="2">
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<taxonomicName id="948EE9C36B79A74C1AB46822E44E0361" ID-CoL="3RF3S" LSID-ZBK="urn:lsid:zoobank.org:act:28DFABE0-47C3-4F4D-BBD3-306EDAB99D10" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Kryptopterus platypogon Ng 2004:2" order="Siluriformes" pageNumber="2" phylum="Chordata" rank="species" species="platypogon">Kryptopterus platypogon</taxonomicName>
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<taxonomicNameLabel id="A3BBCCDBCEB59183E6228309A054B1D5" rank="species">sp. nov.</taxonomicNameLabel>
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(Figs. 1 & 2a)
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</paragraph>
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<paragraph id="A0173A4341F4C4EA71DE625852926EE2" pageNumber="2">
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Type material.
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<materialsCitation id="F45FEBDB4E5F4DE7FA29EDF1E2873007" ID-GBIF-Occurrence="923890671" collectingDate="1998-03-04" collectionCode="ZRC" collectorName="H. H. Tan, Y. Y. Goh" country="Malaysia" latitude="2.2885" location="Borneo, Rajang River drainage, market at Sibu" longitude="111.83033" specimenCode="ZRC 45838" stateProvince="Sarawak" typeStatus="Holotype">
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<typeStatus id="A86CC2EC29F599AA7CC106902A7E9B12">Holotype</typeStatus>
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:
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<specimenCode id="63C1A21DAD1188A6BBB2BB8276ED2706">
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<collectionCode id="7DDCEE38FCE84115D052ADC1E5516B86" collectionName="Singapore, National University of Singapore, Raffles Museum of Biodiversity Research, Zoological Reference Collection">ZRC</collectionCode>
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45838
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</specimenCode>
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, male, 176.3 mm SL;
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<location id="F12A12C90FFBEE90C37E9D5567756BD9" LSID="urn:lsid:plazi:treatment:94BB14AC19093AEF8CC970372DE8DFFB:F12A12C90FFBEE90C37E9D5567756BD9" country="Malaysia" latitude="2.2885" longitude="111.83033" name="Borneo" stateProvince="Sarawak">Borneo</location>
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:
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<collectingRegion id="45BBA790717DDBBEE0015E137034EA83">Sarawak</collectingRegion>
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,
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<location id="C8A813C4E8A99317B432B0A78EAC1271" LSID="urn:lsid:plazi:treatment:94BB14AC19093AEF8CC970372DE8DFFB:C8A813C4E8A99317B432B0A78EAC1271" country="Malaysia" latitude="2.2885" longitude="111.83033" name="Rajang River drainage, market at Sibu" stateProvince="Sarawak">Rajang River drainage, market at Sibu</location>
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,
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<geoCoordinate id="A529CC2DE914F3B8F7C7BCFA7CE302B7" direction="north" orientation="latitude" value="2.2885">2º17'18.6"N</geoCoordinate>
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<geoCoordinate id="B4608910F0EB674ECADE2AE866E709E5" direction="east" orientation="longitude" value="111.83033">111º49'49.2"E</geoCoordinate>
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;
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<collectorName id="18DD10EE3A2AA6130331164D6F579DF0">H. H. Tan & Y. Y. Goh</collectorName>
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,
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<collectingDate id="FAD0751E63C2B5DF7C8A5B5EB66D5DAC" day="04" month="03">
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3-4
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<collectingDate id="F9F2DD31F7BE1152A164F863686FA8DB" month="03" value="1998-03" year="1998">March 1998</collectingDate>
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</collectingDate>
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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="2A1F3E31F34A2409A0C081B998A19BD4" type="diagnosis">
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<paragraph id="AFAB9AB0B5C088ED062FE52EED9E7BB9" pageNumber="2">
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Diagnosis.
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<taxonomicName id="5062A8B0FB9FB795A913F9B0642FE042" LSID-ZBK="urn:lsid:zoobank.org:act:28DFABE0-47C3-4F4D-BBD3-306EDAB99D10" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Kryptopterus platypogon Ng 2004:2" order="Siluriformes" pageNumber="2" phylum="Chordata" rank="species" species="platypogon">Kryptopterus platypogon</taxonomicName>
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,
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<taxonomicName id="8E44FA59CA780DC0280E9850AD90281D" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="2" phylum="Chordata" rank="species" species="hexapterus">K. hexapterus</taxonomicName>
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and
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<taxonomicName id="20EB068772CE61D765AC3B99EE2F04E4" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="2" phylum="Chordata" rank="species" species="cheveyi">K. cheveyi</taxonomicName>
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can be distinguished from congeners by a combination of the absence of a dorsal fin, a strongly-arched dorsal profile with a distinct nuchal concavity and vomerine teeth in a single ovoid patch. The key distinguishing characters among the three species are discussed below and in Table 1.
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</paragraph>
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<paragraph id="E2B5AE290CF08B8FBB396239E1D62BA3" pageNumber="3">
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<taxonomicName id="868E1B7A15BB8F9ED6D33205AA5576F3" LSID-ZBK="urn:lsid:zoobank.org:act:28DFABE0-47C3-4F4D-BBD3-306EDAB99D10" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Kryptopterus platypogon Ng 2004:2" order="Siluriformes" pageNumber="3" phylum="Chordata" rank="species" species="platypogon">Kryptopterus platypogon</taxonomicName>
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differs from
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<taxonomicName id="AB811806105F5B7B79AB1842CD9207AC" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="3" phylum="Chordata" rank="species" species="hexapterus">K. hexapterus</taxonomicName>
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in having a more strongly-projecting lower jaw (Fig. 2), larger eye (14.1% HL vs. 8.0-12.6), longer maxillary (135.6% HL vs. 40.0-120.4) and mandibular (119.3% HL vs. 32.3-80.0) barbels that are flattened and ribbon-like (vs. flattened, but ovoid in cross section), and more ventrally-placed eyes (about one quarter of the orbital margin visible when the head is viewed ventrally vs. orbital margin barely visible; Fig. 3). It is further distinguished from
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<taxonomicName id="22EF3686520B3E3A8B796458281A3127" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="3" phylum="Chordata" rank="species" species="cheveyi">K. cheveyi</taxonomicName>
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in having a strongly projecting lower jaw (vs. upper and lower jaws of equal length), more anal-fin rays (83 vs. 66-71), narrower head (8.6% SL vs. 9.7-12.3) and smaller eye (14.1% HL vs. 18.9-22.7).
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</paragraph>
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</subSubSection>
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<subSubSection id="7E816D965C958B7B382C19C3D91E3E18" type="description">
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<paragraph id="3ACA00356D10156C0CC176676CE55AF6" pageNumber="3">Description. Morphometric data in Table 2. Body laterally compressed; maximum body depth located at pelvic-fin origin; head as broad as body and moderately depressed. Dorsal profile of body strongly arched, with a pronounced nuchal concavity.</paragraph>
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<paragraph id="1BA6D11F235E6ADA485DEA2FCAB732FE" pageNumber="5">Snout rounded when viewed from above. 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 (at level of vertical through anterior orbital margin). Lower jaw strongly projecting forwards.</paragraph>
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<paragraph id="8F3E7DFB67AE0664D68D7D0BAB340CC7" pageNumber="5">Mouth terminal; gape oblique, moderate and extending two-thirds of way between maxillary barbel base and anterior orbital margin. Well-developed rictal lobes present, subtended by deep submandibular groove; upper rictal lobe possessing skin fold with free dorsal edge extending from mouth corner to base of maxillary barbel. Thin, broad supralabial fold extending from below orbit to point two thirds of way between maxillary barbel base and anterior orbital margin.</paragraph>
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<paragraph id="2CCEDF5BF2F4DBAEA7C2E0309C287368" pageNumber="5">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="A415CA911F4FEFBC5D03A7C1D6C8B935" pageNumber="5">Two pairs of barbels, flattened and ribbon-like for entire length. Maxillary barbels reaching to middle of pectoral fin. Mandibular barbels (only outer pair present) reaching to middle of pectoral fin. Eyes small, subcutaneous (without free orbital margin); located at approximately anterior third of 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="B2843257E567E9527BC969BD6D72E10D" pageNumber="5">Gill membranes separate and overlapping, free from isthmus; gular fold well-developed and v-shaped. Branchiostegal rays 14. Gill rakers long and thin, without odontodes; anteriormost rakers on lower first arch widely spaced; 6+21.</paragraph>
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<paragraph id="F311034C2BC0C6719F1CBF4495CFBB41" pageNumber="5">Dorsal fin absent. Depressed pectoral fin reaching beyond origin of anal fin; distal margin broadly convex, with rounded tip. Fourth branched pectoral ray longest and fin with 13 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 rays. Distal margin of anal fin straight, with 83 rays; separate from caudal fin. Integument over anal fin thickened proximally for two thirds of ray lengths; fin-ray 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. 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 11+50=61.</paragraph>
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<paragraph id="9DD15948CD0123E35AD8653714794309" lastPageNumber="6" pageNumber="5">Coloration. In 70% ethanol: Body and head pinkish cream and diffusely pigmented. Light powdering of melanophores on dorsal surface of head and on flanks above lateral line. Thin, diffuse band of melanophores along dorsal midline. Ventral surfaces immaculate and lacking pigmentation. All fins hyaline. Barbels unpigmented.</paragraph>
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</subSubSection>
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<subSubSection id="8C34EA7AFA27C3DCC62DF9220F0B8992" type="distribution">
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<paragraph id="1703C569DDB940B5E2520F82C9AABB9A" pageNumber="6">Distribution. Known from the Rajang River drainage in northern Borneo (Fig. 4).</paragraph>
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</subSubSection>
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<subSubSection id="A30ABEBAA4E518AE526CA05A15000EA9" type="etymology">
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<paragraph id="F1782BD453987FD219A7071F71AAA2D5" pageNumber="6">Etymology. From the Greek platys, meaning flat, and pogon, meaning beard; in reference to the flat ribbon-like barbels of this species. Used as a noun.</paragraph>
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</subSubSection>
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<subSubSection id="88F4C7550883A4E6548212F52E1DA621" type="discussion">
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<paragraph id="CC65DC5A962156702259E44603FB4668" pageNumber="6">Discussion</paragraph>
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<paragraph id="9471159C959D34D1341094A2F9E23EE5" pageNumber="6">
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Bornbusch (1995) diagnosed the
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<taxonomicName id="60A68D6058C0DE70B508E6018EA80E4B" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="hexapterus">K. hexapterus species group</taxonomicName>
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as possessing the following synapomorphies: premaxilla with a slender toothless process extending posteriorly from the lateral corner of the premaxilla and nearly reaching the anterior margin of the metapterygoid, scaphium lacking an ascending process, and the first vertebral centrum lacking a pair of ventral crests. The group includes the following nominal species:
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<taxonomicName id="7568FB3F5FC8C2FF8338764B7310226D" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="hexapterus">K. hexapterus (Bleeker</taxonomicName>
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, 1851),
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<taxonomicName id="7B821CB838328AD1EB7E344356F18682" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="cheveyi">K. cheveyi (Durand</taxonomicName>
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, 1940) and
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<taxonomicName id="7674B5A6E9813F405F2B12B58ED0E0F5" LSID-ZBK="urn:lsid:zoobank.org:act:15ACCCCD-C1F0-47A3-81B4-3268A1B9C129" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Kryptopterus moorei Smith 1945:342" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="moorei">K. moorei Smith</taxonomicName>
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, 1945, with
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<taxonomicName id="2677C57854EEA130D7B5370796F2CDD0" LSID-ZBK="urn:lsid:zoobank.org:act:15ACCCCD-C1F0-47A3-81B4-3268A1B9C129" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Kryptopterus moorei Smith 1945:342" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="moorei">K. moorei</taxonomicName>
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considered a junior synonym of
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<taxonomicName id="2B2CCE4E2D145A9CDDAF2014B8DCE2B8" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="cheveyi">K. cheveyi</taxonomicName>
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(see Kottelat, 1998).
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</paragraph>
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<paragraph id="7C074ADA6A8FF84067E48264584EE978" pageNumber="6">
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Superficially, members of the
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<taxonomicName id="0B6CB0226288D84E07AED6ACACAB1E2A" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="hexapterus">K. hexapterus group</taxonomicName>
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are easily distinguished from congeners in having a combination of the absence of a dorsal fin, a strongly-arched dorsal profile with a distinct nuchal concavity and vomerine teeth in a single ovoid patch.
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<taxonomicName id="A97E980FE43F7B421786D7ADEBDA7DEF" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="schilbeides">Kryptopterus schilbeides</taxonomicName>
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is the only other congener lacking a dorsal fin and with a strongly arched dorsal profile and distinct nuchal concavity, but it can be distinguished from the members of the
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<taxonomicName id="7BA2F1D30285E3BEE0BB6C622B997335" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="hexapterus">K. hexapterus group</taxonomicName>
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in having the vomerine teeth in two elliptical patches (vs. in a single ovoid patch).
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</paragraph>
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<paragraph id="9DBC551F6E23F283ED68BB857E456C9E" lastPageNumber="7" pageNumber="6">
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It is possible that the differences observed between
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<taxonomicName id="C216D5358643EB7BFB9D656010142B6D" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="hexapterus">K. hexapterus</taxonomicName>
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and
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<taxonomicName id="E503F0C183BF90D346B120FF49C6D696" LSID-ZBK="urn:lsid:zoobank.org:act:28DFABE0-47C3-4F4D-BBD3-306EDAB99D10" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Kryptopterus platypogon Ng 2004:2" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="platypogon">K. platypogon</taxonomicName>
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are due to sexual dimorphism, but examination of the series of
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<taxonomicName id="69347B97647081341BDB39A83DC41F50" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="hexapterus">K. hexapterus</taxonomicName>
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collected together with the sole specimen of
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<taxonomicName id="31BD9F337B66C600EEEBA9B3E4BF044E" LSID-ZBK="urn:lsid:zoobank.org:act:28DFABE0-47C3-4F4D-BBD3-306EDAB99D10" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Kryptopterus platypogon Ng 2004:2" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="platypogon">K. platypogon</taxonomicName>
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shows that this is not the case. Both males (easily distinguished by their strongly serrated pectoral spines) and females of
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<taxonomicName id="8ED74F1DCB1EBEB36446CFAEEEB4007C" family="Siluridae" genus="Kryptopterus" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="6" phylum="Chordata" rank="species" species="hexapterus">K. hexapterus</taxonomicName>
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occur in the series, and sexual dimorphism in barbel, snout and eye morphology was not evident in this species. These differences are also not due to allometry, as a bivariate scatterplot of eye diameter and maxillary barbel length against SL (Fig. 5) indicates (it was not possible to plot mandibular barbel length against SL due to the fact that the mandibular barbels were broken off in many of the specimens).
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |