447 lines
63 KiB
XML
447 lines
63 KiB
XML
<document id="E349B41C59E753ECC26E7B420DD5AAED" ID-DOI="10.11646/zootaxa.3686.2.5" ID-GBIF-Dataset="8f6edaca-3776-4e14-9aab-c2c29473b573" ID-ISSN="1175-5326" ID-Zenodo-Dep="284175" ID-ZooBank="B384D416-CF39-4FAB-B7CD-20C7E667E109" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1460647018371" checkinUser="plazi" docAuthor="Conway, Kevin W., Dittmer, Drew E., Jezisek, Laci E. & Ng, Heok Hee" docDate="2013" docId="03BD68410414FFE1BD8BFF5B2008FB59" docLanguage="en" docName="zt03686p243.pdf" docOrigin="Zootaxa 3686 (2)" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Psilorhynchus hamiltoni Conway, Dittmer, Jezisek & Ng, 2013, new species" docType="treatment" docVersion="9" lastPageNumber="236" masterDocId="FF841039040BFFC2BD1CFFCC2434FFED" masterDocTitle="On Psilorhynchus sucatio and P. nudithoracicus, with the description of a new species of Psilorhynchus from northeastern India (Ostariophysi: Psilorhynchidae)" masterLastPageNumber="243" masterPageNumber="201" pageNumber="232" updateTime="1698337160623" updateUser="plazi">
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<mods:title id="321EBF31BBDF1B87980873781B635DB4">On Psilorhynchus sucatio and P. nudithoracicus, with the description of a new species of Psilorhynchus from northeastern India (Ostariophysi: Psilorhynchidae)</mods:title>
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<mods:namePart id="F06A8CCA17E2E2AE6A3C82086CF72C5A">Conway, Kevin W.</mods:namePart>
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<mods:namePart id="C3109EDECB133C9E72D1E869F17F34CE">Dittmer, Drew E.</mods:namePart>
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<mods:namePart id="1AAB1DF3907B4F60ABB1588A6DC8C69B">Jezisek, Laci E.</mods:namePart>
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<mods:namePart id="34CD63DC8F4FF685A6F3DF6A2CD9B2D2">Ng, Heok Hee</mods:namePart>
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<mods:title id="CFA2D0490918A70DA21030CD26C04C0E">Zootaxa</mods:title>
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<mods:date id="9716AEE1CECF05224068D810673A7BFB">2013</mods:date>
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<mods:number id="B2864E5D64E2EC45BE1FB3EB545A8F79">3686</mods:number>
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<treatment id="03BD68410414FFE1BD8BFF5B2008FB59" ID-DOI="http://doi.org/10.5281/zenodo.6158496" ID-GBIF-Taxon="119572102" ID-Zenodo-Dep="6158496" LSID="urn:lsid:plazi:treatment:03BD68410414FFE1BD8BFF5B2008FB59" httpUri="http://treatment.plazi.org/id/03BD68410414FFE1BD8BFF5B2008FB59" lastPageId="35" lastPageNumber="236" pageId="31" pageNumber="232">
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<subSubSection id="C30E8ADC0414FFDDBD8BFF5B252FFF3F" pageId="31" pageNumber="232" type="nomenclature">
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<paragraph id="8BABD9570414FFDDBD8BFF5B2654FF5C" blockId="31.[151,608,151,210]" box="[151,608,151,177]" pageId="31" pageNumber="232">
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<heading id="D0E36E3B0414FFDDBD8BFF5B2654FF5C" bold="true" box="[151,608,151,177]" fontSize="11" level="1" pageId="31" pageNumber="232" reason="1">
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<emphasis id="B96005450414FFDDBD8BFF5B2654FF5C" bold="true" box="[151,608,151,177]" pageId="31" pageNumber="232">
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<taxonomicName id="4C14A2D40414FFDDBD8BFF5B25F5FF5C" ID-CoL="4PJHZ" box="[151,449,151,177]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="31" pageNumber="232" phylum="Chordata" rank="species" species="hamiltoni" status="sp. nov.">
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<emphasis id="B96005450414FFDDBD8BFF5B25F5FF5C" bold="true" box="[151,449,151,177]" italics="true" pageId="31" pageNumber="232">Psilorhynchus hamiltoni</emphasis>
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</taxonomicName>
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,
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<taxonomicNameLabel id="A253B83E0414FFDDBCCCFF5B2654FF5C" box="[464,608,151,177]" pageId="31" pageNumber="232" rank="species">new species</taxonomicNameLabel>
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</emphasis>
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</heading>
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</paragraph>
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<paragraph id="8BABD9570414FFDDBD8BFF76252FFF3F" blockId="31.[151,608,151,210]" box="[151,283,186,210]" pageId="31" pageNumber="232">
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<figureCitation id="132FC5D20414FFDDBD8BFF7624C7FF3F" box="[151,243,186,210]" captionStart="FIGURE 23" captionStartId="31.[151,250,1919,1942]" captionTargetBox="[151,1436,986,1895]" captionTargetId="figure@31.[151,1436,986,1895]" captionTargetPageId="31" captionText="FIGURE 23. Psilorhynchus hamiltoni, UMMZ 249903, holotype, 30.6 mm SL; India: West Bengal, Tista River at Tista Barrage." httpUri="https://zenodo.org/record/302189/files/figure.png" pageId="31" pageNumber="232">Figs. 23</figureCitation>
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,
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<figureCitation id="132FC5D20414FFDDBDE3FF76252FFF3F" box="[255,283,186,210]" captionStart="FIGURE 24" captionStartId="33.[151,250,1329,1352]" captionTargetBox="[151,1435,195,1304]" captionTargetId="figure@33.[151,1436,195,1305]" captionTargetPageId="33" captionText="FIGURE 24. Oromandibular structures of Psilorhynchus hamiltoni, UMMZ 249904, paratype, 26.0 mm SL. A. Ventral surface of head, anterior to top. B. Close up of box i in A, showing unculi on upper lip. C. Close up of box ii in A, showing tastebuds on lower lip. D. Skin fold at right side of mouth. E. Unculiferous globular papillae on surface of superficial portion of lower jaw cushion. F. Posterior edge of rostral cap close to ventral midline, showing tastebuds and eroded tubercles; four tastebuds are encircled with black dashed circles. G. Close up of box iii in A, showing unculi on lower jaw. Abbreviations: LJ, lower jaw; LL, lower lip; MT, tubercle; RC, rostral cap; SF, skin fold; TB, tastebud; UL, upper lip; UnPap, unculiferous globular papilla." httpUri="https://zenodo.org/record/302194/files/figure.png" pageId="31" pageNumber="232">24</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection id="C30E8ADC0414FFDDBD8BFECF20D3FE8F" pageId="31" pageNumber="232" type="materials_examined">
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<paragraph id="8BABD9570414FFDDBD8BFECF26A6FED3" blockId="31.[151,1437,258,931]" pageId="31" pageNumber="232">
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<emphasis id="B96005450414FFDDBD8BFECF253FFEF6" bold="true" box="[151,267,259,283]" pageId="31" pageNumber="232">
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<typeStatus id="54AF67F50414FFDDBD8BFECF2532FEF6" box="[151,262,259,283]" pageId="31" pageNumber="232" type="holotype">Holotype</typeStatus>
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.
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</emphasis>
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<collectionCode id="ED0541920414FFDDBC0EFECF255DFEF7" box="[274,361,259,282]" httpUri="http://grbio.org/cool/ra64-3eva" name="University of Michigan, Museum of Zoology" pageId="31" pageNumber="232">UMMZ</collectionCode>
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249903,
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<quantity id="4CEC74B20414FFDDBCCEFECE2602FEF7" box="[466,566,258,282]" metricMagnitude="-2" metricUnit="m" metricValue="3.06" pageId="31" pageNumber="232" unit="mm" value="30.6">30.6 mm</quantity>
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<collectionCode id="ED0541920414FFDDBF21FECE2655FEF7" box="[573,609,258,282]" pageId="31" pageNumber="232">SL</collectionCode>
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;
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<collectingCountry id="F30399C70414FFDDBF71FECE269FFEF7" box="[621,683,258,282]" name="India" pageId="31" pageNumber="232">India</collectingCountry>
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: West Bengal, Tista River at Tista Barrage,
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<quantity id="4CEC74B20414FFDDB989FECE20E8FEF7" box="[1173,1244,258,282]" metricMagnitude="2" metricUnit="m" metricValue="1.05" pageId="31" pageNumber="232" unit="m" value="105.0">105 m</quantity>
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asl,
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<geoCoordinate id="EE20BF900414FFDDB80DFECE21AFFEF7" box="[1297,1435,258,282]" direction="north" orientation="latitude" pageId="31" pageNumber="232" precision="1" value="26.750278">26°45'1.0"N</geoCoordinate>
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<geoCoordinate id="EE20BF900414FFDDBD8BFEEA251AFED3" box="[151,302,294,318]" direction="east" orientation="longitude" pageId="31" pageNumber="232" precision="1" value="88.58639">88°35'11.0"E</geoCoordinate>
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, H. H. Ng
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<emphasis id="B96005450414FFDDBCBBFEE425EBFED3" box="[423,479,294,319]" italics="true" pageId="31" pageNumber="232">et al.</emphasis>
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,
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<date id="FFAAFF970414FFDDBCF1FEEA26BAFED3" box="[493,654,294,318]" pageId="31" pageNumber="232" value="2004-04-15">15 April 2004</date>
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.
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</paragraph>
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<paragraph id="8BABD9570414FFDDBDDBFE8720D3FE8F" blockId="31.[151,1437,258,931]" box="[199,1255,330,355]" pageId="31" pageNumber="232">
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<emphasis id="B96005450414FFDDBDDBFE872572FE8E" bold="true" box="[199,326,331,355]" pageId="31" pageNumber="232">
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<typeStatus id="54AF67F50414FFDDBDDBFE872575FE8E" box="[199,321,331,355]" pageId="31" pageNumber="232" type="paratype">Paratypes</typeStatus>
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||
.
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</emphasis>
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||
<collectionCode id="ED0541920414FFDDBC50FE872597FE8F" box="[332,419,331,354]" httpUri="http://grbio.org/cool/ra64-3eva" name="University of Michigan, Museum of Zoology" pageId="31" pageNumber="232">UMMZ</collectionCode>
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249904, 5 (1c&s; 1 SEM stub),
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<quantity id="4CEC74B20414FFDDBE0CFE862787FE8F" box="[784,947,330,354]" metricMagnitude="-2" metricUnit="m" metricValue="2.605" metricValueMax="2.63" metricValueMin="2.58" pageId="31" pageNumber="232" unit="mm" value="26.05" valueMax="26.3" valueMin="25.8">25.8–26.3 mm</quantity>
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<collectionCode id="ED0541920414FFDDBEA6FE8627EBFE8F" box="[954,991,330,354]" pageId="31" pageNumber="232">SL</collectionCode>
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||
: same data as
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<typeStatus id="54AF67F50414FFDDB962FE8620D0FE8F" box="[1150,1252,330,354]" pageId="31" pageNumber="232" type="holotype">holotype</typeStatus>
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.
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</paragraph>
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</subSubSection>
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<subSubSection id="C30E8ADC0414FFDDBDDBFEA2217FFDFB" pageId="31" pageNumber="232" type="diagnosis">
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<paragraph id="8BABD9570414FFDDBDDBFEA2217FFDFB" blockId="31.[151,1437,258,931]" pageId="31" pageNumber="232">
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<emphasis id="B96005450414FFDDBDDBFEA22575FE6A" bold="true" box="[199,321,366,391]" pageId="31" pageNumber="232">Diagnosis.</emphasis>
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A member of the
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<taxonomicName id="4C14A2D40414FFDDBF13FEBC26B2FE6B" box="[527,646,366,391]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="31" pageNumber="232" phylum="Chordata" rank="species" species="balitora">
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<emphasis id="B96005450414FFDDBF13FEBC26B2FE6B" box="[527,646,366,391]" italics="true" pageId="31" pageNumber="232">P. balitora</emphasis>
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</taxonomicName>
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species group, distinguished from all other members by the following combination of characters: lateral stripe well-developed; 7–11 round to squarish lateral blotches; 6–7 dorsal saddles; dorsal saddles without contact to lateral blotches; lateral line scales 34–35; principal caudal-fin rays 9+8– 9; pectoral-fin rays
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<date id="FFAAFF970414FFDDBC60FE1625DBFE1F" box="[380,495,474,498]" pageId="31" pageNumber="232" value="2011-05-09" valueMax="2011-06-09" valueMin="2011-05-09">v–vi.9–11</date>
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; total vertebrae 36 (18+18); two branchiostegal rays; parietal portion of temporal sensory canal with 2 openings; ventral surface between paired fins with a broad rectangular scaleless patch.
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</paragraph>
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</subSubSection>
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<subSubSection id="C30E8ADC0414FFE3BDDBFDEE2776F865" lastPageId="33" lastPageNumber="234" pageId="31" pageNumber="232" type="description">
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<paragraph id="8BABD9570414FFDDBDDBFDEE2748FD4B" blockId="31.[151,1437,258,931]" pageId="31" pageNumber="232">
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<emphasis id="B96005450414FFDDBDDBFDEE256DFDD6" bold="true" box="[199,345,546,571]" pageId="31" pageNumber="232">Description.</emphasis>
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General body shape as in
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<figureCitation id="132FC5D20414FFDDBF99FDEE26C1FDD7" box="[645,757,546,570]" captionStart="FIGURE 23" captionStartId="31.[151,250,1919,1942]" captionTargetBox="[151,1436,986,1895]" captionTargetId="figure@31.[151,1436,986,1895]" captionTargetPageId="31" captionText="FIGURE 23. Psilorhynchus hamiltoni, UMMZ 249903, holotype, 30.6 mm SL; India: West Bengal, Tista River at Tista Barrage." httpUri="https://zenodo.org/record/302189/files/figure.png" pageId="31" pageNumber="232">Figure 23</figureCitation>
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. Morphometric data are listed in Table 1 and select meristic characters in Tables 2 and 3. Body elongate, dorsal profile weakly arched. Body depth greatest at point slightly anterior to dorsal-fin origin, narrowest at base of caudal peduncle. Ventral profile straight from lower jaw to analfin origin, weakly concave from anal-fin origin to caudal-fin base.
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</paragraph>
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<paragraph id="8BABD9570414FFE2BDDBFD7E203CFE89" blockId="31.[151,1437,258,931]" lastBlockId="32.[151,1437,151,2034]" lastPageId="32" lastPageNumber="233" pageId="31" pageNumber="232">
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||
Head and eye large, pupil elliptical, with longest axis of ellipse orientated along dorsal-ventral body axis. Mouth inferior, relatively wide (
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<figureCitation id="132FC5D20414FFDDBF15FD1A2654FD03" box="[521,608,726,750]" captionStart="FIGURE 24" captionStartId="33.[151,250,1329,1352]" captionTargetBox="[151,1435,195,1304]" captionTargetId="figure@33.[151,1436,195,1305]" captionTargetPageId="33" captionText="FIGURE 24. Oromandibular structures of Psilorhynchus hamiltoni, UMMZ 249904, paratype, 26.0 mm SL. A. Ventral surface of head, anterior to top. B. Close up of box i in A, showing unculi on upper lip. C. Close up of box ii in A, showing tastebuds on lower lip. D. Skin fold at right side of mouth. E. Unculiferous globular papillae on surface of superficial portion of lower jaw cushion. F. Posterior edge of rostral cap close to ventral midline, showing tastebuds and eroded tubercles; four tastebuds are encircled with black dashed circles. G. Close up of box iii in A, showing unculi on lower jaw. Abbreviations: LJ, lower jaw; LL, lower lip; MT, tubercle; RC, rostral cap; SF, skin fold; TB, tastebud; UL, upper lip; UnPap, unculiferous globular papilla." httpUri="https://zenodo.org/record/302194/files/figure.png" pageId="31" pageNumber="232">Fig. 24</figureCitation>
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). Snout short, rounded anteriorly, its ventral surface bordered by a deep longitudinal groove on each side. Rostral cap and upper lip fused, separated by a shallow groove; posterolateralmost part of rostral cap continuous around corner of mouth, contacting skin fold at posterolateral corner of mouth; posterior margin of rostral cap smooth. Lower lip portion of lower-jaw cushion broadly rectangular, anterior edge straight; superficial layer of lower-jaw cushion covered in low, rounded globular papillae, separated by deep grooves; majority of globular papillae concentrated directly posterior to middle of lower lip portion of lower-jaw cushion, becoming scarcer laterally. Upper lip covered with narrow, dagger-like unculi, ranging in height from ~10–20 μm, becoming increasingly longer towards mouth opening; lower jaw unculi not examined. Skin fold around posterolateral corner of mouth large and flap-like, continuous anteriorly with posterolateralmost part of upper lip and rostral cap; outer edge of skin fold smooth, globular papillae absent; tubercles present around outer edge of skin fold. Posterior edge of rostral cap, lower lip, skin fold, and globular papillae all densely covered with tastebuds. Gill membranes joined to isthmus.
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</paragraph>
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<caption id="DF6B89DF0414FFDDBD8BF8B324DAF859" httpUri="https://zenodo.org/record/302189/files/figure.png" pageId="31" pageNumber="232" targetBox="[151,1436,986,1895]" targetPageId="31">
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<paragraph id="8BABD9570414FFDDBD8BF8B324DAF859" blockId="31.[151,1436,1919,1972]" pageId="31" pageNumber="232">
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<emphasis id="B96005450414FFDDBD8BF8B32517F879" bold="true" box="[151,291,1919,1942]" pageId="31" pageNumber="232">FIGURE 23.</emphasis>
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<taxonomicName id="4C14A2D40414FFDDBC31F8B3261EF878" box="[301,554,1919,1941]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="31" pageNumber="232" phylum="Chordata" rank="species" species="hamiltoni">
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<emphasis id="B96005450414FFDDBC31F8B3261EF878" box="[301,554,1919,1941]" italics="true" pageId="31" pageNumber="232">Psilorhynchus hamiltoni</emphasis>
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</taxonomicName>
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||
, UMMZ 249903, holotype, 30.6 mm SL; India: West Bengal, Tista River at Tista Barrage.
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||
</paragraph>
|
||
</caption>
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||
<paragraph id="8BABD957042BFFE2BDDBFEA3279AFD02" blockId="32.[151,1437,151,2034]" pageId="32" pageNumber="233">
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||
Following osteological features based on a single c&s specimen. Pre-epiphyseal fontanelle small, triangular. Post-epiphyseal fontanelle present, long, irregularly shaped (pinched along its center;
|
||
<figureCitation id="132FC5D2042BFFE2B969FE5820F3FE41" box="[1141,1223,404,428]" captionStart="FIGURE 13" captionStartId="20.[151,250,1599,1622]" captionTargetBox="[154,1426,204,1570]" captionTargetId="figure@20.[150,1436,195,1575]" captionTargetPageId="20" captionText="FIGURE 13. Dorsal surface of the neurocranium of Psilorhynchus sucatio and members of the P. balitora and P. nudithoracicus species groups, showing cranial fontanelle and surrounding bones, anterior to top. A. Psilorhynchus sucatio, CAS 50289, 39.6 mm SL. B. Psilorhynchus melissa, UMMZ 248830, paratype, 49.8 mm SL. C. Psilorhynchus nudithoracicus, UMMZ 205345, 39.1 mm SL. D. Psilorhynchus robustus, CMK 17941, Paratype, 58.1 mm SL. E. Psilorhynchus tenura, uncat., 38.0 mm SL. F. Psilorhynchus balitora, UMMZ 244782, 31.2 mm SL. G. Psilorhynchus breviminor, ZRC 43452, paratype, 32.0 mm SL. H. Psilorhynchus brachyrhynchus, NRM 40922, 38.0 mm SL. I. Psilorhynchus nepalensis, KU 40663, 42.0 mm SL. J. Psilorhynchus pavimentatus, UMMZ 248832, paratype, 48.7 mm SL. K. Psilorhynchus rahmani, ZRC 51437, paratype, 28.9 mm SL. L. Psilorhynchus hamiltoni, UMMZ 249904, paratype, 26.3 mm SL. Cephalic sensory canals illustrated on left side only. Abbreviations: E, ethmoid complex; Fr, frontal; Pa, parietal; Soc, supraoccipital." httpUri="https://zenodo.org/record/284188/files/figure.png" pageId="32" pageNumber="233">Fig. 13</figureCitation>
|
||
L), separated from pre-epiphyseal fontanelle by wide expanse of frontal. Five infraorbitals (IO1–5). IO1–3 platelike, IO1 largest of the series, IO4–5 narrow tube-like bones, composed of sensory canal ossification only. Anguloarticular portion of preopercular mandibular canal and parietal portion of supraorbital canal absent. Openings in preopercular portion of preopercular mandibular canal 4. Openings in nasal portion of supraorbital canal 3. Openings in parietal portion of temporal canal 2. Supraoccipital portion of temporal canal open. Fifth ceratobranchial with a single row of four needle-like teeth. Branchiostegal rays 2; anteriormost branchiostegal ray articulating with medial face of anterior ceratohyal absent. Anterior swimbladder chamber surrounded by a thick peritoneal tunic, partially enclosed in a bony capsule formed anteriorly by lateral process of 2nd vertebral centrum and laterally by outer arm of os suspensorium. Posterior swimbladder chamber greatly reduced in size.
|
||
</paragraph>
|
||
<paragraph id="8BABD957042BFFE2BDDBFD3026ACFBD9" blockId="32.[151,1437,151,2034]" pageId="32" pageNumber="233">
|
||
Dorsal-fin rays
|
||
<date id="FFAAFF97042BFFE2BC64FD302590FCF9" box="[376,420,764,788]" pageId="32" pageNumber="233">iii.9</date>
|
||
(5, including
|
||
<typeStatus id="54AF67F5042BFFE2BF58FD30269BFCF9" box="[580,687,764,788]" pageId="32" pageNumber="233" type="holotype">holotype</typeStatus>
|
||
[*]) or
|
||
<date id="FFAAFF97042BFFE2BFEBFD302717FCF9" box="[759,803,764,788]" pageId="32" pageNumber="233">iii.8</date>
|
||
(1). Anal-fin rays
|
||
<date id="FFAAFF97042BFFE2BEE4FD302028FCF9" box="[1016,1052,764,788]" pageId="32" pageNumber="233">ii.6</date>
|
||
(6). Principal caudal-fin rays 9+9 (2*) or 9+8 (4), dorsal procurrent rays 9, ventral procurrent rays 6. Pectoral fin rays
|
||
<date id="FFAAFF97042BFFE2B95EFCD32059FCDA" box="[1090,1133,799,823]" pageId="32" pageNumber="233">vi.9</date>
|
||
(1),
|
||
<date id="FFAAFF97042BFFE2B9BEFCD320EFFCDA" box="[1186,1243,799,823]" pageId="32" pageNumber="233" value="2010-06">vi.10</date>
|
||
(4*) or
|
||
<date id="FFAAFF97042BFFE2B82AFCD32159FCDA" box="[1334,1389,799,823]" pageId="32" pageNumber="233" value="2011-06">vi.11</date>
|
||
(1), pelvic fin rays
|
||
<date id="FFAAFF97042BFFE2BC58FC88255DFCB1" box="[324,361,836,860]" pageId="32" pageNumber="233">ii.7</date>
|
||
(6). Paired fins horizontally placed, pectoral fins larger than pelvic fins. Pectoral fin reaching vertical through dorsal-fin origin when adpressed. Pelvic-fin origin posterior to dorsal-fin origin, insertion opposite second or third branched dorsal-fin ray. Well-developed unculiferous paired-fin pads present along ventral surface of four-five anteriormost pectoral fin rays and two anteriormost pelvic-fin rays. Dorsal fin moderately high, triangular in shape with weakly pointed tip; posterior margin weakly concave. Anal fin small, triangular in shape with weakly pointed tip; posterior margin weakly concave; not reaching caudal-fin base when adpressed. Caudal fin weakly forked, tips of both lobes rounded.
|
||
</paragraph>
|
||
<paragraph id="8BABD957042BFFE2BDDBFB8C264EFAE4" blockId="32.[151,1437,151,2034]" pageId="32" pageNumber="233">
|
||
Scales cycloid, large, with several well-developed radii over posterior field of scale body. 34 (1) or 35 (2*) scales along lateral line, plus 2 (3) pored scales on base of caudal fin. Number of transverse scale rows from dorsalfin origin to pelvic-fin origin not obtainable (scales between dorsal fin and lateral line missing in all
|
||
<typeStatus id="54AF67F5042BFFE2B9E5FB44211DFB4D" box="[1273,1321,1160,1184]" pageId="32" pageNumber="233">type</typeStatus>
|
||
material). 10 scale rows around caudal peduncle, 10 (1) or 11 (2*) predorsal scales, 10 (3) or 11 (1*) scales between anus and anal-fin origin. Ventral surface between paired fins without scales. Total number of vertebrae 36, consisting of 18+18 (1) abdominal and caudal vertebrae.
|
||
</paragraph>
|
||
<paragraph id="8BABD957042BFFE2BDDBFAD827FBFA9E" blockId="32.[151,1437,151,2034]" pageId="32" pageNumber="233">Small conical tubercles with poorly keratinized tip distributed over lateral and dorsal surfaces of head, including snout and anteroventral region of rostral cap. Posteroventral margin of rostral cap with small dagger-like tubercles. Body and fin tuberculation not developed in available material.</paragraph>
|
||
<paragraph id="8BABD957042BFFE2BDDBFAB224E9F8F0" blockId="32.[151,1437,151,2034]" pageId="32" pageNumber="233">
|
||
<emphasis id="B9600545042BFFE2BDDBFAB2257BFA7A" bold="true" box="[199,335,1406,1431]" pageId="32" pageNumber="233">Coloration.</emphasis>
|
||
In alcohol body background color light cream (
|
||
<figureCitation id="132FC5D2042BFFE2BE95FAB327D5FA7A" box="[905,993,1407,1431]" captionStart="FIGURE 23" captionStartId="31.[151,250,1919,1942]" captionTargetBox="[151,1436,986,1895]" captionTargetId="figure@31.[151,1436,986,1895]" captionTargetPageId="31" captionText="FIGURE 23. Psilorhynchus hamiltoni, UMMZ 249903, holotype, 30.6 mm SL; India: West Bengal, Tista River at Tista Barrage." httpUri="https://zenodo.org/record/302189/files/figure.png" pageId="32" pageNumber="233">Fig. 23</figureCitation>
|
||
). Occiput dark brown. Dorsal surface between occiput and dorsal fin with two dark brown saddles, first situated at midpoint between occiput and dorsalfin origin, second situated at dorsal-fin origin. Number of dorsal saddles posterior to dorsal-fin origin variable, with six present in
|
||
<typeStatus id="54AF67F5042BFFE2BC2EFA2525A0F9EC" box="[306,404,1513,1537]" pageId="32" pageNumber="233" type="holotype">holotype</typeStatus>
|
||
and four present in
|
||
<typeStatus id="54AF67F5042BFFE2BF6FFA2626D6F9EF" box="[627,738,1514,1538]" pageId="32" pageNumber="233" type="paratype">paratypes</typeStatus>
|
||
. In
|
||
<typeStatus id="54AF67F5042BFFE2BE16FA26274CF9EF" box="[778,888,1514,1538]" pageId="32" pageNumber="233" type="paratype">paratypes</typeStatus>
|
||
, first post-dorsal-fin origin saddle situated below middle of dorsal fin, between insertions of branched dorsal-fin rays 4–6, second situated directly between dorsalfin and anal-fin origin, third situated directly above middle of anal fin, fourth situated at base of caudal fin. In
|
||
<typeStatus id="54AF67F5042BFFE2BD8BF99824C8F981" box="[151,252,1620,1644]" pageId="32" pageNumber="233" type="holotype">holotype</typeStatus>
|
||
, post-dorsal-fin origin saddles narrower than those of
|
||
<typeStatus id="54AF67F5042BFFE2BE60F99927DFF980" box="[892,1003,1621,1645]" pageId="32" pageNumber="233" type="paratype">paratypes</typeStatus>
|
||
. First situated at same position as in
|
||
<typeStatus id="54AF67F5042BFFE2BD8BF9B42531F97D" box="[151,261,1656,1680]" pageId="32" pageNumber="233" type="paratype">paratypes</typeStatus>
|
||
, second situated closer to insertion of last dorsal-fin ray than point opposite anal-fin origin, third situated slightly anterior to point opposite anal-fin origin, fourth situated directly above middle of anal fin, fifth situated at center of caudal peduncle, sixth situated at base of caudal fin. Saddle situated at dorsal-fin origin largest of series. Dorsal saddles extending ventrally 1–2 scale rows on body side, without contact with lateral blotches or lateral stripe.
|
||
</paragraph>
|
||
<paragraph id="8BABD957042BFFE2BDDBF8E421A9F81F" blockId="32.[151,1437,151,2034]" pageId="32" pageNumber="233">Flank with 7 (2), 8(2), 9(1) or 11(1*) small round to squarish dark brown blotches arranged in a longitudinal row. Size and position of lateral blotches along flank highly variable, excluding first, situated posterodorsal to opercular opening, and last, situated at caudal-fin base. Lateral stripe dark brown, well developed. Scales situated over anterodorsal surface of body, anterior to dorsal fin, with scattering of light brown melanophores along posterior edge, forming weak reticulate pattern. Scales in L+1 row dorsal to lateral line scales 10–25 with small light brown spot at center. Scales in L-1 row ventral to lateral line scales 6–11 with small dark brown spot at center.</paragraph>
|
||
<caption id="DF6B89DF042AFFE3BD8BFAFD250AFA12" httpUri="https://zenodo.org/record/302194/files/figure.png" pageId="33" pageNumber="234" targetBox="[151,1435,195,1304]" targetPageId="33">
|
||
<paragraph id="8BABD957042AFFE3BD8BFAFD250AFA12" blockId="33.[151,1436,1329,1535]" pageId="33" pageNumber="234">
|
||
<emphasis id="B9600545042AFFE3BD8BFAFD2510FAAA" bold="true" box="[151,292,1329,1352]" pageId="33" pageNumber="234">FIGURE 24.</emphasis>
|
||
Oromandibular structures of
|
||
<taxonomicName id="4C14A2D4042AFFE3BF78FAFD2755FAAA" box="[612,865,1329,1351]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="33" pageNumber="234" phylum="Chordata" rank="species" species="hamiltoni">
|
||
<emphasis id="B9600545042AFFE3BF78FAFD2755FAAA" box="[612,865,1329,1351]" italics="true" pageId="33" pageNumber="234">Psilorhynchus hamiltoni</emphasis>
|
||
</taxonomicName>
|
||
, UMMZ 249904, paratype, 26.0 mm SL.
|
||
<emphasis id="B9600545042AFFE3B830FAFE2171FAAA" bold="true" box="[1324,1349,1330,1351]" pageId="33" pageNumber="234">A.</emphasis>
|
||
Ventral surface of head, anterior to top.
|
||
<emphasis id="B9600545042AFFE3BCFEFA9D25CEFA8B" bold="true" box="[482,506,1361,1382]" pageId="33" pageNumber="234">B.</emphasis>
|
||
Close up of box i in A, showing unculi on upper lip.
|
||
<emphasis id="B9600545042AFFE3B934FA9C2074FA8A" bold="true" box="[1064,1088,1360,1383]" pageId="33" pageNumber="234">C.</emphasis>
|
||
Close up of box ii in A, showing tastebuds on lower lip.
|
||
<emphasis id="B9600545042AFFE3BC9DFAA325ADFA69" bold="true" box="[385,409,1391,1412]" pageId="33" pageNumber="234">D.</emphasis>
|
||
Skin fold at right side of mouth.
|
||
<emphasis id="B9600545042AFFE3BFFAFAA326CAFA69" bold="true" box="[742,766,1391,1412]" pageId="33" pageNumber="234">E.</emphasis>
|
||
Unculiferous globular papillae on surface of superficial portion of lower jaw cushion.
|
||
<emphasis id="B9600545042AFFE3BC7BFA422548FA4E" bold="true" box="[359,380,1422,1443]" pageId="33" pageNumber="234">F.</emphasis>
|
||
Posterior edge of rostral cap close to ventral midline, showing tastebuds and eroded tubercles; four tastebuds are encircled with black dashed circles.
|
||
<emphasis id="B9600545042AFFE3BF8CFA60269EFA2E" bold="true" box="[656,682,1452,1475]" pageId="33" pageNumber="234">G.</emphasis>
|
||
Close up of box iii in A, showing unculi on lower jaw. Abbreviations: LJ, lower jaw; LL, lower lip; MT, tubercle; RC, rostral cap; SF, skin fold; TB, tastebud; UL, upper lip; UnPap, unculiferous globular papilla.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph id="8BABD957042AFFE3BD8BF9E02761F967" blockId="33.[151,1436,1580,2000]" pageId="33" pageNumber="234">Unscaled base of pectoral fin and scales adjacent to pelvic-fin origin peppered with small dark brown melanophores, forming indistinct pectoral-base and pre-pelvic spots, respectively. Lateral surface of snout and skin over opercle densely scattered with dark brown melanophores.</paragraph>
|
||
<paragraph id="8BABD957042AFFE3BDDBF95A2776F865" blockId="33.[151,1436,1580,2000]" pageId="33" pageNumber="234">Ventral surface largely devoid of pigment except for a small patch of brown melanophores situated beneath scales at anal-fin origin and a short line of melanophores posterior to anus, running along ventral midline from 2nd to 5th scale in scale row running between anus and anal-fin origin. Dorsal surface of pectoral- and pelvic-fin rays marked with small melanophores. Dorsal fin with weak stripe across center, formed by aggregations of small dark brown melanophores at fork of branched rays. Anal fin hyaline. Caudal fin with dark brown triangular blotch at base, orientated with posteriormost tip of triangle extending into base of lower lobe. Additional small dark brown markings variably present throughout upper and lower lobes.</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="C30E8ADC042AFFE3BDDBF85F21A8F822" pageId="33" pageNumber="234" type="distribution">
|
||
<paragraph id="8BABD957042AFFE3BDDBF85F21A8F822" blockId="33.[151,1436,1580,2000]" pageId="33" pageNumber="234">
|
||
<emphasis id="B9600545042AFFE3BDDBF85F2554F841" bold="true" box="[199,352,1939,1964]" pageId="33" pageNumber="234">Distribution.</emphasis>
|
||
<taxonomicName id="4C14A2D4042AFFE3BC7BF858264EF841" box="[359,634,1940,1964]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="33" pageNumber="234" phylum="Chordata" rank="species" species="hamiltoni">
|
||
<emphasis id="B9600545042AFFE3BC7BF858264EF841" box="[359,634,1940,1964]" italics="true" pageId="33" pageNumber="234">Psilorhynchus hamiltoni</emphasis>
|
||
</taxonomicName>
|
||
is known currently only from the
|
||
<typeStatus id="54AF67F5042AFFE3BEE6F859201EF840" box="[1018,1066,1941,1965]" pageId="33" pageNumber="234">type</typeStatus>
|
||
locality on the Tista River at the Tista Barrage (
|
||
<figureCitation id="132FC5D2042AFFE3BC21F87B25A4F822" box="[317,400,1975,1999]" captionStart="FIGURE 21" captionStartId="27.[151,250,1953,1976]" captionTargetBox="[190,1388,1438,1924]" captionTargetId="figure@27.[151,1436,1419,1939]" captionTargetPageId="27" captionText="FIGURE 21. Distribution of Psilorhynchus nudithoracicus and P. hamiltoni. Grey symbols indicate localities obtained from the literature. Open grey and open black triangle represent the type localities of P. nudithoracicus and P. gracilis, respectively. Symbols may represent more than one collection locality." httpUri="https://zenodo.org/record/302181/files/figure.png" pageId="33" pageNumber="234">Fig. 21</figureCitation>
|
||
). This locality has been described previously by
|
||
<bibRefCitation id="EF85A4A6042AFFE3BEACF8742010F822" author="Ng" box="[944,1060,1975,2000]" pageId="33" pageNumber="234" refString="Ng, H. H. (2005) Pseudolaguvia foveolata, a new catfish (Teleostei: Erethistidae) from northeastern India. Ichthyological Exploration of Freshwaters, 16, 173 - 178." type="journal article" year="2005">Ng (2005)</bibRefCitation>
|
||
and
|
||
<bibRefCitation id="EF85A4A6042AFFE3B945F87B21ACF822" author="Conway" box="[1113,1432,1975,1999]" pageId="33" pageNumber="234" refString="Conway, K. W. & Mayden, R. L. (2008 b) Two new species of Psilorhynchus (Ostariophysi: Psilorhynchidae) with the redescription of P. balitora. Ichthyological Exploration of Freshwaters, 19, 215 - 232." type="journal article" year="2008" yearSuffix="b">Conway & Mayden (2008b)</bibRefCitation>
|
||
.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<caption id="DF6B89DF0429FFE0BD8BFAF3205BFA5C" httpUri="https://zenodo.org/record/302197/files/figure.png" pageId="34" pageNumber="235" targetBox="[151,1431,195,1319]" targetPageId="34">
|
||
<paragraph id="8BABD9570429FFE0BD8BFAF3205BFA5C" blockId="34.[151,1436,1343,1458]" pageId="34" pageNumber="235">
|
||
<emphasis id="B96005450429FFE0BD8BFAF32515FAB8" bold="true" box="[151,289,1343,1366]" pageId="34" pageNumber="235">FIGURE 25.</emphasis>
|
||
Oromandibular structures of
|
||
<taxonomicName id="4C14A2D40429FFE0BF48FAF3270AFAB8" box="[596,830,1343,1365]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="34" pageNumber="235" phylum="Chordata" rank="species" species="balitora">
|
||
<emphasis id="B96005450429FFE0BF48FAF3270AFAB8" box="[596,830,1343,1365]" italics="true" pageId="34" pageNumber="235">Psilorhynchus balitora</emphasis>
|
||
</taxonomicName>
|
||
, BMNH 2010.2.2.5-6, 32.0 mm SL.
|
||
<emphasis id="B96005450429FFE0B9DDFA8C20EDFAB8" bold="true" box="[1217,1241,1344,1365]" pageId="34" pageNumber="235">A.</emphasis>
|
||
Ventral surface of head, anterior to top.
|
||
<emphasis id="B96005450429FFE0BC6DFA9325BCFA99" bold="true" box="[369,392,1375,1396]" pageId="34" pageNumber="235">B.</emphasis>
|
||
Close up of box i in A, showing unculi on upper lip.
|
||
<emphasis id="B96005450429FFE0BEB6FA9227F7FA98" bold="true" box="[938,963,1374,1397]" pageId="34" pageNumber="235">C.</emphasis>
|
||
Close up of box ii in A, showing tastebuds on lower lip.
|
||
<emphasis id="B96005450429FFE0BDE1FAB12522FA7F" bold="true" box="[253,278,1405,1426]" pageId="34" pageNumber="235">D.</emphasis>
|
||
Skin fold at right side of mouth.
|
||
<emphasis id="B96005450429FFE0BF7EFAB1264EFA7F" bold="true" box="[610,634,1405,1426]" pageId="34" pageNumber="235">E.</emphasis>
|
||
Lower jaw cushion. Abbreviations: LJ, lower jaw; LL, lower lip; MT, tubercle; RC, rostral cap; SF, skin fold; TB, tastebud; UL, upper lip; UnPap, unculiferous globular papilla.
|
||
</paragraph>
|
||
</caption>
|
||
<subSubSection id="C30E8ADC0429FFE0BDDBFA13251AF9D0" pageId="34" pageNumber="235" type="etymology">
|
||
<paragraph id="8BABD9570429FFE0BDDBFA13251AF9D0" blockId="34.[151,1436,1502,2024]" pageId="34" pageNumber="235">
|
||
<emphasis id="B96005450429FFE0BDDBFA13257AFA1A" bold="true" box="[199,334,1503,1527]" pageId="34" pageNumber="235">Etymology.</emphasis>
|
||
Named in honor of the exceptional Scottish naturalist Francis Hamilton (
|
||
<date id="FFAAFF970429FFE0B99CFA122130FA1B" box="[1152,1284,1502,1526]" pageId="34" pageNumber="235" value="1762" valueMax="1829">1762–1829</date>
|
||
), a pioneer of Indian ichthyology, who spent more than 17 years surveying the freshwater fish fauna of large areas of the Indian subcontinent.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="C30E8ADC0429FFE1BDDBF9852008FB59" lastPageId="35" lastPageNumber="236" pageId="34" pageNumber="235" type="discussion">
|
||
<paragraph id="8BABD9570429FFE0BDDBF98525ABF891" blockId="34.[151,1436,1502,2024]" pageId="34" pageNumber="235">
|
||
<emphasis id="B96005450429FFE0BDDBF985250FF98C" bold="true" box="[199,315,1609,1633]" pageId="34" pageNumber="235">Remarks.</emphasis>
|
||
The six specimens on which the above description is based were collected together with specimens of
|
||
<taxonomicName id="4C14A2D40429FFE0BDA5F9A12507F969" box="[185,307,1644,1668]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="34" pageNumber="235" phylum="Chordata" rank="species" species="balitora">
|
||
<emphasis id="B96005450429FFE0BDA5F9A12507F969" box="[185,307,1644,1668]" italics="true" pageId="34" pageNumber="235">P. balitora</emphasis>
|
||
</taxonomicName>
|
||
, and all were subsequently catalogued together (as
|
||
<taxonomicName id="4C14A2D40429FFE0BE8AF9A12024F969" box="[918,1040,1644,1668]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="34" pageNumber="235" phylum="Chordata" rank="species" species="balitora">
|
||
<emphasis id="B96005450429FFE0BE8AF9A12024F969" box="[918,1040,1644,1668]" italics="true" pageId="34" pageNumber="235">P. balitora</emphasis>
|
||
</taxonomicName>
|
||
) in UMMZ 244849. During their redescription of
|
||
<taxonomicName id="4C14A2D40429FFE0BC4EF95D2728F94A" authority="Conway & Mayden" authorityName="Conway & Mayden" authorityYear="2008" box="[338,796,1679,1704]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="34" pageNumber="235" phylum="Chordata" rank="species" species="balitora">
|
||
<emphasis id="B96005450429FFE0BC4EF95D25FEF945" box="[338,458,1680,1704]" italics="true" pageId="34" pageNumber="235">P. balitora</emphasis>
|
||
,
|
||
<bibRefCitation id="EF85A4A60429FFE0BCC6F9432728F94A" author="Conway" box="[474,796,1679,1703]" pageId="34" pageNumber="235" refString="Conway, K. W. & Mayden, R. L. (2008 b) Two new species of Psilorhynchus (Ostariophysi: Psilorhynchidae) with the redescription of P. balitora. Ichthyological Exploration of Freshwaters, 19, 215 - 232." type="journal article" year="2008" yearSuffix="b">Conway & Mayden (2008b)</bibRefCitation>
|
||
</taxonomicName>
|
||
examined only the five largest specimens from UMMZ 244849 (all
|
||
<taxonomicName id="4C14A2D40429FFE0BC3DF97825A3F926" box="[289,407,1715,1739]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="34" pageNumber="235" phylum="Chordata" rank="species" species="balitora">
|
||
<emphasis id="B96005450429FFE0BC3DF97825A3F926" box="[289,407,1715,1739]" italics="true" pageId="34" pageNumber="235">P. balitora</emphasis>
|
||
</taxonomicName>
|
||
), overlooking the fact that this lot contained individuals belonging to two separate species (Conway, pers. obs.). The mixed nature of this lot did not became apparent until later (in 2010), when one of us (KWC) reinvestigated its contents and noticed that the six smallest specimens do not possess scales along the ventral surface of the body between the paired fins (an area that is invariably scaled in
|
||
<taxonomicName id="4C14A2D40429FFE0B988F8D32138F8DB" box="[1172,1292,1822,1846]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="34" pageNumber="235" phylum="Chordata" rank="species" species="balitora">
|
||
<emphasis id="B96005450429FFE0B988F8D32138F8DB" box="[1172,1292,1822,1846]" italics="true" pageId="34" pageNumber="235">P. balitora</emphasis>
|
||
</taxonomicName>
|
||
;
|
||
<bibRefCitation id="EF85A4A60429FFE0B803F8D12578F8B4" author="Conway" pageId="34" pageNumber="235" refString="Conway, K. W. & Mayden, R. L. (2008 b) Two new species of Psilorhynchus (Ostariophysi: Psilorhynchidae) with the redescription of P. balitora. Ichthyological Exploration of Freshwaters, 19, 215 - 232." type="journal article" year="2008" yearSuffix="b">Conway & Mayden, 2008b</bibRefCitation>
|
||
), which prompted further investigation and ultimately led to the conclusion that they belonged to an undescribed species.
|
||
</paragraph>
|
||
<paragraph id="8BABD9570429FFE1BDDBF8452164FE45" blockId="34.[151,1436,1502,2024]" lastBlockId="35.[151,1436,151,1204]" lastPageId="35" lastPageNumber="236" pageId="34" pageNumber="235">
|
||
In addition to the absence of scales along the ventral surface between the paired fins,
|
||
<taxonomicName id="4C14A2D40429FFE0B9A7F8452171F84D" box="[1211,1349,1928,1952]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="34" pageNumber="235" phylum="Chordata" rank="species" species="hamiltoni">
|
||
<emphasis id="B96005450429FFE0B9A7F8452171F84D" box="[1211,1349,1928,1952]" italics="true" pageId="34" pageNumber="235">P. hamiltoni</emphasis>
|
||
</taxonomicName>
|
||
can be further distinguished from
|
||
<taxonomicName id="4C14A2D40429FFE0BCCAF8612666F829" box="[470,594,1964,1988]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="34" pageNumber="235" phylum="Chordata" rank="species" species="balitora">
|
||
<emphasis id="B96005450429FFE0BCCAF8612666F829" box="[470,594,1964,1988]" italics="true" pageId="34" pageNumber="235">P. balitora</emphasis>
|
||
</taxonomicName>
|
||
by its higher number of lateral line scales (34–35 vs. 30–32), caudal vertebrae (18 vs. 15–16), and total vertebrae (36 vs. 31–33), a lower number of branchiostegal rays (two vs. three) and openings in the parietal portion of the temporal canal (two vs. three), and by having a large post-epiphyseal fontanelle that is bordered anteriorly by the frontals (vs. post-epiphyseal fontanelle small, restricted to posterodorsalmost portion of neurocranium, bordered anteriorly by the parietals). Features of the color pattern also serve to distinguish
|
||
<taxonomicName id="4C14A2D40428FFE1BC65FECF2634FEF7" box="[377,512,258,282]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="species" species="hamiltoni">
|
||
<emphasis id="B96005450428FFE1BC65FECF2634FEF7" box="[377,512,258,282]" italics="true" pageId="35" pageNumber="236">P. hamiltoni</emphasis>
|
||
</taxonomicName>
|
||
from
|
||
<taxonomicName id="4C14A2D40428FFE1BF59FECF268FFEF7" box="[581,699,258,282]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="species" species="balitora">
|
||
<emphasis id="B96005450428FFE1BF59FECF268FFEF7" box="[581,699,258,282]" italics="true" pageId="35" pageNumber="236">P. balitora</emphasis>
|
||
</taxonomicName>
|
||
. In
|
||
<taxonomicName id="4C14A2D40428FFE1BFF5FECF275BFEF7" box="[745,879,258,282]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="species" species="hamiltoni">
|
||
<emphasis id="B96005450428FFE1BFF5FECF275BFEF7" box="[745,879,258,282]" italics="true" pageId="35" pageNumber="236">P. hamiltoni</emphasis>
|
||
</taxonomicName>
|
||
the lateral stripe is well developed, whereas in
|
||
<taxonomicName id="4C14A2D40428FFE1B89BFECF24C5FED3" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="species" species="balitora">
|
||
<emphasis id="B96005450428FFE1B89BFECF24C5FED3" italics="true" pageId="35" pageNumber="236">P. balitora</emphasis>
|
||
</taxonomicName>
|
||
(and all other members of the
|
||
<taxonomicName id="4C14A2D40428FFE1BF76FEEB26D0FED3" box="[618,740,294,318]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="species" species="balitora">
|
||
<emphasis id="B96005450428FFE1BF76FEEB26D0FED3" box="[618,740,294,318]" italics="true" pageId="35" pageNumber="236">P. balitora</emphasis>
|
||
</taxonomicName>
|
||
species group) the lateral stripe is poorly developed. In
|
||
<taxonomicName id="4C14A2D40428FFE1B89BFEEB2537FE8C" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="species" species="hamiltoni">
|
||
<emphasis id="B96005450428FFE1B89BFEEB2537FE8C" italics="true" pageId="35" pageNumber="236">P. hamiltoni</emphasis>
|
||
</taxonomicName>
|
||
the saddles along the dorsal surface of the body do not make contact with the lateral blotches along the body side, whereas in
|
||
<taxonomicName id="4C14A2D40428FFE1BC8AFEA22639FE68" box="[406,525,365,389]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="species" species="balitora">
|
||
<emphasis id="B96005450428FFE1BC8AFEA22639FE68" box="[406,525,365,389]" italics="true" pageId="35" pageNumber="236">P. balitora</emphasis>
|
||
</taxonomicName>
|
||
(and all other members of the
|
||
<taxonomicName id="4C14A2D40428FFE1BE73FEA227D2FE68" box="[879,998,365,389]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="species" species="balitora">
|
||
<emphasis id="B96005450428FFE1BE73FEA227D2FE68" box="[879,998,365,389]" italics="true" pageId="35" pageNumber="236">P. balitora</emphasis>
|
||
</taxonomicName>
|
||
species group, excluding
|
||
<taxonomicName id="4C14A2D40428FFE1B80CFEA221B8FE68" box="[1296,1420,365,389]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="species" species="rahmani">
|
||
<emphasis id="B96005450428FFE1B80CFEA221B8FE68" box="[1296,1420,365,389]" italics="true" pageId="35" pageNumber="236">P. rahmani</emphasis>
|
||
</taxonomicName>
|
||
), the saddles extend far enough ventrally (over the side of the body) to make contact with the lateral blotches.
|
||
</paragraph>
|
||
<paragraph id="8BABD9570428FFE1BDDBFE7F24F7FC98" blockId="35.[151,1436,151,1204]" pageId="35" pageNumber="236">
|
||
All available specimens of
|
||
<taxonomicName id="4C14A2D40428FFE1BCE3FE7926B3FE21" box="[511,647,436,460]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="species" species="hamiltoni">
|
||
<emphasis id="B96005450428FFE1BCE3FE7926B3FE21" box="[511,647,436,460]" italics="true" pageId="35" pageNumber="236">P. hamiltoni</emphasis>
|
||
</taxonomicName>
|
||
are presumably juveniles or small adults, ranging in size from
|
||
<quantity id="4CEC74B20428FFE1B841FE7F24C9FE02" metricMagnitude="-2" metricUnit="m" metricValue="2.815" metricValueMax="3.06" metricValueMin="2.57" pageId="35" pageNumber="236" unit="mm" value="28.15" valueMax="30.6" valueMin="25.7">25.7– 30.6 mm</quantity>
|
||
SL. Despite their small size, these specimens exhibit small round tubercles over the dorsal and lateral surfaces of the head and snout. Tubercles are, however, absent from the body and fins. SEM investigation of the mouthparts of a single
|
||
<typeStatus id="54AF67F50428FFE1BCBDFDD32635FDDA" box="[417,513,543,567]" pageId="35" pageNumber="236" type="paratype">paratype</typeStatus>
|
||
(
|
||
<quantity id="4CEC74B20428FFE1BF0EFDD2264EFDDB" box="[530,634,542,566]" metricMagnitude="-2" metricUnit="m" metricValue="2.63" pageId="35" pageNumber="236" unit="mm" value="26.3">26.3 mm</quantity>
|
||
SL) revealed the presence of small (but nevertheless well developed) conical tubercles on the surface of the skin-flap at either corner of the mouth and small dagger-shaped tubercles along the posteroventral edge of the rostral cap (
|
||
<figureCitation id="132FC5D20428FFE1BFCBFDA92719FD90" box="[727,813,613,637]" captionStart="FIGURE 24" captionStartId="33.[151,250,1329,1352]" captionTargetBox="[151,1435,195,1304]" captionTargetId="figure@33.[151,1436,195,1305]" captionTargetPageId="33" captionText="FIGURE 24. Oromandibular structures of Psilorhynchus hamiltoni, UMMZ 249904, paratype, 26.0 mm SL. A. Ventral surface of head, anterior to top. B. Close up of box i in A, showing unculi on upper lip. C. Close up of box ii in A, showing tastebuds on lower lip. D. Skin fold at right side of mouth. E. Unculiferous globular papillae on surface of superficial portion of lower jaw cushion. F. Posterior edge of rostral cap close to ventral midline, showing tastebuds and eroded tubercles; four tastebuds are encircled with black dashed circles. G. Close up of box iii in A, showing unculi on lower jaw. Abbreviations: LJ, lower jaw; LL, lower lip; MT, tubercle; RC, rostral cap; SF, skin fold; TB, tastebud; UL, upper lip; UnPap, unculiferous globular papilla." httpUri="https://zenodo.org/record/302194/files/figure.png" pageId="35" pageNumber="236">Fig. 24</figureCitation>
|
||
) that could not be observed in the
|
||
<typeStatus id="54AF67F50428FFE1B9CFFDA92101FD90" box="[1235,1333,613,637]" pageId="35" pageNumber="236" type="holotype">holotype</typeStatus>
|
||
or other
|
||
<typeStatus id="54AF67F50428FFE1BD8BFD452536FD4C" box="[151,258,649,673]" pageId="35" pageNumber="236" type="paratype">paratypes</typeStatus>
|
||
using light microscopy. Dagger-shaped tubercles (with tips oriented caudally) are common along the posteroventral margin of the rostral cap in other species of
|
||
<taxonomicName id="4C14A2D40428FFE1BE37FD6027FFFD29" box="[811,971,684,708]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="genus">
|
||
<emphasis id="B96005450428FFE1BE37FD6027FFFD29" box="[811,971,684,708]" italics="true" pageId="35" pageNumber="236">Psilorhynchus</emphasis>
|
||
</taxonomicName>
|
||
(for example see
|
||
<figureCitation id="132FC5D20428FFE1B988FD6020E1FD29" box="[1172,1237,684,708]" captionStart="FIGURE 4" captionStartId="6.[151,250,1964,1987]" captionTargetBox="[151,1436,1208,1939]" captionTargetId="figure@6.[151,1436,1208,1941]" captionTargetPageId="6" captionText="FIGURE 4. Psilorhynchus sucatio, KU 28616, 51.3 mm SL; Nepal: Sunsari, Koshi River at Bhantabari." httpUri="https://zenodo.org/record/302127/files/figure.png" pageId="35" pageNumber="236">
|
||
Fig.
|
||
<quantity id="4CEC74B20428FFE1B9DBFD6020E1FD29" box="[1223,1237,684,708]" metricMagnitude="-1" metricUnit="m" metricValue="1.016" pageId="35" pageNumber="236" unit="in" value="4.0">4</quantity>
|
||
</figureCitation>
|
||
in
|
||
<bibRefCitation id="EF85A4A60428FFE1B9E5FD6024E7FD0A" author="Conway" pageId="35" pageNumber="236" refString="Conway, K. W., Mayden, R. L., Shrestha, J. & Edds, D. (2012) Redescription of the Nepalese endemic torrent minnow Psilorhynchus pseudecheneis Menon & Datta (Teleostei: Psilorhynchidae) with comments on P. homaloptera Hora & Mukerji. Ichthyological Exploration of Freshwaters, 23, 193 - 210." type="journal article" year="2012">
|
||
Conway
|
||
<emphasis id="B96005450428FFE1B841FD6121A1FD29" box="[1373,1429,684,708]" italics="true" pageId="35" pageNumber="236">et al.</emphasis>
|
||
, 2012
|
||
</bibRefCitation>
|
||
;
|
||
<figureCitation id="132FC5D20428FFE1BDC2FD03251AFD0A" box="[222,302,719,743]" captionStart="FIGURE 25" captionStartId="34.[151,250,1343,1366]" captionTargetBox="[151,1431,195,1319]" captionTargetId="figure@34.[151,1436,195,1319]" captionTargetPageId="34" captionText="FIGURE 25. Oromandibular structures of Psilorhynchus balitora, BMNH 2010.2.2.5 - 6, 32.0 mm SL. A. Ventral surface of head, anterior to top. B. Close up of box i in A, showing unculi on upper lip. C. Close up of box ii in A, showing tastebuds on lower lip. D. Skin fold at right side of mouth. E. Lower jaw cushion. Abbreviations: LJ, lower jaw; LL, lower lip; MT, tubercle; RC, rostral cap; SF, skin fold; TB, tastebud; UL, upper lip; UnPap, unculiferous globular papilla." httpUri="https://zenodo.org/record/302197/files/figure.png" pageId="35" pageNumber="236">Fig. 25</figureCitation>
|
||
herein) and are easily observed with light microscopy in well-preserved specimens. The presence of tubercles over the surface of the skin-flap positioned at the corner of the mouth appears to be less common, as evidenced by their absence in
|
||
<emphasis id="B96005450428FFE1BCF3FCDB266DFCC3" box="[495,601,791,814]" italics="true" pageId="35" pageNumber="236">P. s u c a t i o</emphasis>
|
||
(
|
||
<figureCitation id="132FC5D20428FFE1BF71FCDA2686FCC3" box="[621,690,790,814]" captionStart="FIGURE 9" captionStartId="16.[151,250,1579,1602]" captionTargetBox="[151,1418,189,1555]" captionTargetId="figure@16.[151,1436,189,1555]" captionTargetPageId="16" captionText="FIGURE 9. Oromandibular structures of Psilorhynchus sucatio, UMMZ 205349, 23.5 mm SL. A. Ventral surface of head, anterior to top of page. B. Close up of box i in A, showing unculi on upper lip. C. Close up of box ii in A, showing tastebuds on lower lip. D. Skin fold at right side of mouth. E. Globular papillae on surface of superficial portion of lower jaw cushion; three tastebuds are encircled with black dashed circles. F. Posterior edge of rostral cap close to ventral midline, showing tastebuds and eroded tubercles; four tastebuds are encircled with black dashed circles. G. Close up of box iii in A, showing unculi on lower jaw. Abbreviations: LJ, lower jaw; LL, lower lip; MT, tubercle; Pap, globular papilla; RC, rostral cap; SF, skin fold; TB, tastebud; UL, upper lip." httpUri="https://zenodo.org/record/302142/files/figure.png" pageId="35" pageNumber="236">Fig. 9</figureCitation>
|
||
) and
|
||
<taxonomicName id="4C14A2D40428FFE1BFE8FCDB278CFCC3" box="[756,952,790,814]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="species" species="nudithoracicus">
|
||
<emphasis id="B96005450428FFE1BFE8FCDB278CFCC3" box="[756,952,790,814]" italics="true" pageId="35" pageNumber="236">P. nudithoracicus</emphasis>
|
||
</taxonomicName>
|
||
(
|
||
<figureCitation id="132FC5D20428FFE1BED5FCDA2029FCC3" box="[969,1053,790,814]" captionStart="FIGURE 19" captionStartId="27.[151,250,859,882]" captionTargetBox="[151,1423,157,841]" captionTargetId="figure@27.[151,1436,157,841]" captionTargetPageId="27" captionText="FIGURE 19. Oromandibular structures of Psilorhynchus nudithoracicus, KU 28815, 24.0 mm SL. A. Ventral surface of head, anterior to top. B. Close up of box in A, showing unculi on upper lip. C. Skin fold at right side of mouth. Abbreviations: LJ, lower jaw; LL, lower lip; Pap, globular papilla; RC, rostral cap; SF, skin fold; TB, tastebud; UL, upper lip." httpUri="https://zenodo.org/record/302173/files/figure.png" pageId="35" pageNumber="236">Fig. 19</figureCitation>
|
||
). In addition to the
|
||
<typeStatus id="54AF67F50428FFE1B9E3FCDB2154FCC2" box="[1279,1376,791,815]" pageId="35" pageNumber="236" type="paratype">paratype</typeStatus>
|
||
of
|
||
<taxonomicName id="4C14A2D40428FFE1B89BFCDB2536FCBF" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="species" species="hamiltoni">
|
||
<emphasis id="B96005450428FFE1B89BFCDB2536FCBF" italics="true" pageId="35" pageNumber="236">P. hamiltoni</emphasis>
|
||
</taxonomicName>
|
||
, we have observed these structures only in the single individual of
|
||
<taxonomicName id="4C14A2D40428FFE1BEEEFCF72053FCBF" box="[1010,1127,826,850]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="species" species="balitora">
|
||
<emphasis id="B96005450428FFE1BEEEFCF72053FCBF" box="[1010,1127,826,850]" italics="true" pageId="35" pageNumber="236">P. balitora</emphasis>
|
||
</taxonomicName>
|
||
examined using SEM (
|
||
<figureCitation id="132FC5D20428FFE1B872FCF52483FC98" captionStart="FIGURE 25" captionStartId="34.[151,250,1343,1366]" captionTargetBox="[151,1431,195,1319]" captionTargetId="figure@34.[151,1436,195,1319]" captionTargetPageId="34" captionText="FIGURE 25. Oromandibular structures of Psilorhynchus balitora, BMNH 2010.2.2.5 - 6, 32.0 mm SL. A. Ventral surface of head, anterior to top. B. Close up of box i in A, showing unculi on upper lip. C. Close up of box ii in A, showing tastebuds on lower lip. D. Skin fold at right side of mouth. E. Lower jaw cushion. Abbreviations: LJ, lower jaw; LL, lower lip; MT, tubercle; RC, rostral cap; SF, skin fold; TB, tastebud; UL, upper lip; UnPap, unculiferous globular papilla." httpUri="https://zenodo.org/record/302197/files/figure.png" pageId="35" pageNumber="236">Fig. 25</figureCitation>
|
||
).
|
||
</paragraph>
|
||
<paragraph id="8BABD9570428FFE1BDDBFC4C2008FB59" blockId="35.[151,1436,151,1204]" pageId="35" pageNumber="236">
|
||
Though once considered to be a relatively minor component of the South Asian ichthyofauna (
|
||
<bibRefCitation id="EF85A4A60428FFE1B816FC4C21A4FC75" author="Hora" box="[1290,1424,896,920]" pageId="35" pageNumber="236" refString="Hora, S. L. (1920) Revision of the Indian Homalopteridae and of the genus Psilorhynchus (Cyprinidae). Records of the Indian Museum, 19, 195 - 215." type="journal article" year="1920">Hora, 1920</bibRefCitation>
|
||
), recent investigations have revealed the
|
||
<taxonomicName id="4C14A2D40428FFE1BF6DFC682711FC51" box="[625,805,932,956]" class="Actinopterygii" family="Psilorhynchidae" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="family">Psilorhynchidae</taxonomicName>
|
||
to be surprisingly diverse, with twelve new species described since 2007 (
|
||
<bibRefCitation id="EF85A4A60428FFE1BCBAFC0426D6FC0D" author="Conway" box="[422,738,968,992]" pageId="35" pageNumber="236" refString="Conway, K. W. & Kottelat, M. (2007) A new species of Psilorhynchus (Teleostei: Psilorhynchidae) from the Ataran River drainage, Myanmar, with comments on the generic name Psilorhynchoides. Zootaxa, 1663, 47 - 57." type="journal article" year="2007">Conway & Kottelat, 2007</bibRefCitation>
|
||
,
|
||
<bibRefCitation id="EF85A4A60428FFE1BFE8FC04271BFC0D" author="Kottelat" box="[756,815,968,992]" pageId="35" pageNumber="236" refString="Conway, K. W. & Kottelat, M. (2010) Two new species of torrent minnow (Ostariophysi: Psilorhynchidae: Psilorhynchus) from Western Myanmar. The Raffles Bulletin of Zoology, 58, 259 - 267." type="journal article" year="2010">2010</bibRefCitation>
|
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;
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Arunachalam
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Nebeshwar
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<bibRefCitation id="EF85A4A60428FFE1BF59FC27274EFBEE" author="Conway" box="[581,890,1003,1027]" pageId="35" pageNumber="236" refString="Conway, K. W. & Mayden, R. L. (2008 a) Psilorhynchus breviminor, a new species of psilorhynchid from Myanmar (Ostariophysi: Psilorhynchidae). Ichthyological Exploration of Freshwaters, 19, 111 - 120." type="journal article" year="2008" yearSuffix="a">Conway & Mayden 2008a</bibRefCitation>
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,
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<bibRefCitation id="EF85A4A60428FFE1BEB6FC27208CFBEE" author="Conway" box="[938,1208,1003,1027]" pageId="35" pageNumber="236" refString="Conway, K. W. & Britz, R. (2010) Three new species of Psilorhynchus from Myanmar (Ostariophysi: Psilorhynchidae). Zootaxa, 2616, 1 - 16." type="journal article" year="2010">Conway & Britz, 2010</bibRefCitation>
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). Given the pace at which new species of
|
||
<taxonomicName id="4C14A2D40428FFE1BCB9FBC22671FBCB" box="[421,581,1038,1062]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="genus">
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||
<emphasis id="B96005450428FFE1BCB9FBC22671FBCB" box="[421,581,1038,1062]" italics="true" pageId="35" pageNumber="236">Psilorhynchus</emphasis>
|
||
</taxonomicName>
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||
continue to be described, the discovery of an additional species in the Brahmaputra drainage of northeastern
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||
<collectingCountry id="F30399C70428FFE1BF52FBFE26BCFBA7" box="[590,648,1074,1098]" name="India" pageId="35" pageNumber="236">India</collectingCountry>
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||
is not surprising and further highlights our incomplete knowledge of the Indian freshwater ichthyofauna. The discovery of
|
||
<taxonomicName id="4C14A2D40428FFE1BFE9FB9B2749FB83" box="[757,893,1110,1134]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="species" species="hamiltoni">
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||
<emphasis id="B96005450428FFE1BFE9FB9B2749FB83" box="[757,893,1110,1134]" italics="true" pageId="35" pageNumber="236">P. hamiltoni</emphasis>
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</taxonomicName>
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||
in a “well-examined” lot of
|
||
<taxonomicName id="4C14A2D40428FFE1B9DEFB9A2156FB83" box="[1218,1378,1110,1134]" class="Actinopterygii" family="Psilorhynchidae" genus="Psilorhynchus" kingdom="Animalia" order="Cypriniformes" pageId="35" pageNumber="236" phylum="Chordata" rank="genus">
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||
<emphasis id="B96005450428FFE1B9DEFB9A2156FB83" box="[1218,1378,1110,1134]" italics="true" pageId="35" pageNumber="236">Psilorhynchus</emphasis>
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||
</taxonomicName>
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||
was, however, completely unexpected, and its description should serve as a cautionary tale for those that may be tempted to ignore those smaller, harder to reach specimens, at the bottom of the jar.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |