135 lines
20 KiB
XML
135 lines
20 KiB
XML
<document id="46B7019E460A33036B67F2D3F9E8A1DA" ENCODING="UTF-8" ID-GBIF-Dataset="7b74dd89-3db5-41af-8499-cf216a4ab73d" ModsDocID="z01047p001" checkinTime="1247056604684" checkinUser="thomas" docAuthor="Heok Hee Ng & David R. Edds" docDate="2005" docId="325A7AB688B6750032FC5570C51DE0C9" docLanguage="en" docName="2005_Ng_Edds_gg1.xml" docOrigin="Zootaxa 1047" docSource="http://www.zoobank.org/urn:lsid:zoobank.org:pub:E29D456B-DC4B-40EA-A11F-0A3F53380A68" docTitle="Pseudecheneis Blyth" docType="treatment" docVersion="12" lastPageNumber="16" masterDocId="997C1BE742F8650C8FDD49DE36FCD2A1" masterDocTitle="Two new species of Pseudecheneis, rheophilic catfishes (Teleostei: Sisoridae) from Nepal." masterLastPageNumber="19" masterPageNumber="1" pageNumber="12" updateTime="1701314207313" updateUser="plazi">
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<mods:title id="16BFA3F3C4D3215D4F4B9786FE6861BB">Two new species of Pseudecheneis, rheophilic catfishes (Teleostei: Sisoridae) from Nepal.</mods:title>
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<mods:name id="64A92EFB5F45C1E766906697DB4E1AD7" type="personal">
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<mods:roleTerm id="CCBEDEB48B5D7E280A76D73E6597BC0A">Author</mods:roleTerm>
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<mods:namePart id="DE986EF70ECBEFAE5B3588E7CB8D27AB">Heok Hee Ng</mods:namePart>
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</mods:name>
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<mods:roleTerm id="EC0BAD370E77D028C9933C0FAB2E6066">Author</mods:roleTerm>
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<mods:namePart id="62AC2616B18421A43965C216A6634132">David R. Edds</mods:namePart>
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<mods:typeOfResource id="BC1CFC6ED83D37495794BD543E91B3A6">text</mods:typeOfResource>
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<mods:title id="A91FB9FAF5B4C1672F4550292EBBA771">Zootaxa</mods:title>
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<mods:part id="D251CBF6C6FDE022F7C407E7D25EB832">
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<mods:date id="0D6B0CF103ECBE498FDBED419F953300">2005</mods:date>
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<mods:number id="F9996C20B863DC660052F3F9126319D1">1047</mods:number>
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<mods:classification id="C44CBBD28D97525C589B139FB68E83DD">journal article</mods:classification>
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<treatment id="325A7AB688B6750032FC5570C51DE0C9" ID-DOI="http://doi.org/10.5281/zenodo.6265984" ID-GBIF-Taxon="100124219" ID-Zenodo-Dep="6265984" LSID="urn:lsid:plazi:treatment:325A7AB688B6750032FC5570C51DE0C9" httpUri="http://treatment.plazi.org/id/325A7AB688B6750032FC5570C51DE0C9" lastPageNumber="16" pageNumber="12">
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<subSubSection id="C8BDAF8073F843384393BFB35E634DDB" type="nomenclature">
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<paragraph id="8DDF8A63709D0F7998BFD642B07F0997">
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[[
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<taxonomicName id="CC82E40C743B4FAFEF1472E64764E303" ID-CoL="6YVX" ID-ENA="205341" LSID-ZBK="urn:lsid:zoobank.org:act:0A1502AF-3B84-4BA1-95C1-C24D72CCC5EE" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis Blyth 1860:154" order="Siluriformes" pageNumber="12" phylum="Chordata" rank="genus">Pseudecheneis Blyth</taxonomicName>
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]]
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</paragraph>
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</subSubSection>
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<subSubSection id="8C8D5F42EA7E460A9041368E5F92D2DD" type="discussion">
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<paragraph id="66F36E1A0499B81FB50C87E352AEA046" pageNumber="12">Discussion</paragraph>
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<paragraph id="65FF5438F751EF4E9C2FAB6DA3423323" pageNumber="12">
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<taxonomicName id="D3076F0A18ADDB66571D5E2EB8A78D47" LSID-ZBK="urn:lsid:zoobank.org:act:C1E91261-79E3-423B-80B6-F9B448760C86" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis intermedius Chu 1982:430 [Engl. p. 437]" order="Siluriformes" pageNumber="12" phylum="Chordata" rank="species" species="intermedius">Pseudecheneis intermedius Chu, 1982</taxonomicName>
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is here considered a junior synonym of
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<taxonomicName id="12814D0E0E5070998DA89BCD9C05A367" LSID-ZBK="urn:lsid:zoobank.org:act:31513E00-E57B-4618-A71C-41681FF7E329" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis paviei Vaillant 1892:126 [2]" order="Siluriformes" pageNumber="12" phylum="Chordata" rank="species" species="paviei">P. paviei</taxonomicName>
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.
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<taxonomicName id="EF7B5D187D7299A5B98D793B47848EC6" LSID-ZBK="urn:lsid:zoobank.org:act:C1E91261-79E3-423B-80B6-F9B448760C86" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis intermedius Chu 1982:430 [Engl. p. 437]" order="Siluriformes" pageNumber="12" phylum="Chordata" rank="species" species="intermedius">Pseudecheneis intermedius</taxonomicName>
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was distinguished from
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<taxonomicName id="F7783E9FED7B574E9AE13CE4589BD0B1" LSID-ZBK="urn:lsid:zoobank.org:act:31513E00-E57B-4618-A71C-41681FF7E329" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis paviei Vaillant 1892:126 [2]" order="Siluriformes" pageNumber="12" phylum="Chordata" rank="species" species="paviei">P. paviei</taxonomicName>
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by the relative position of the adipose and anal fins (Chu, 1982). Our examination of material identified as
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<taxonomicName id="C7B1FC0CCE49E612E6691D5F3684A0B5" LSID-ZBK="urn:lsid:zoobank.org:act:C1E91261-79E3-423B-80B6-F9B448760C86" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis intermedius Chu 1982:430 [Engl. p. 437]" order="Siluriformes" pageNumber="12" phylum="Chordata" rank="species" species="intermedius">P. intermedius</taxonomicName>
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and
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<taxonomicName id="6CBCB80DD314032B6EC94FA4FDD47EA1" LSID-ZBK="urn:lsid:zoobank.org:act:31513E00-E57B-4618-A71C-41681FF7E329" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis paviei Vaillant 1892:126 [2]" order="Siluriformes" pageNumber="12" phylum="Chordata" rank="species" species="paviei">P. paviei</taxonomicName>
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from northern Vietnam and southern China revealed no significant differences in the relative position of the adipose and anal fins, nor could we find any other morphological or biometric differences to distinguish between the two. Chu et al. (1990) indicated that the outline of the snout tip can be used to distinguish between the two species, but this is a variable character that changes with the position of the maxillary barbels (i.e. whether they are projected sideways or pressed against the head) and is therefore not considered a useful diagnostic feature here. We tentatively follow Zhou & Chu (1992) in considering
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<taxonomicName id="359396ED12F8A9CB49A74DC4C2378149" LSID-ZBK="urn:lsid:zoobank.org:act:DB70F0B4-4FB7-4148-A6B4-CC37F69F7DF1" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis tchangi Hora 1937:348" order="Siluriformes" pageNumber="12" phylum="Chordata" rank="species" species="tchangi">P. tchangi (Hora, 1937)</taxonomicName>
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a junior synonym of
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<taxonomicName id="9B01ECF0A026E1A1B1A57F28F74F1B08" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="12" phylum="Chordata" rank="species" species="sulcata">P. sulcata</taxonomicName>
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. The status of
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<taxonomicName id="1C75FAB386B077A5A647AB5611BB4D0F" LSID-ZBK="urn:lsid:zoobank.org:act:DB70F0B4-4FB7-4148-A6B4-CC37F69F7DF1" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis tchangi Hora 1937:348" order="Siluriformes" pageNumber="12" phylum="Chordata" rank="species" species="tchangi">P. tchangi</taxonomicName>
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is being investigated in a separate study by HHN.
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</paragraph>
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<paragraph id="3336C08C6406BA218AB8E02DB13D8271" pageNumber="13">
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The relative height of the neural spines readily distinguishes
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<taxonomicName id="BCF9B1F8080A91024476B4BBE5048BF8" LSID-ZBK="urn:lsid:zoobank.org:act:175A3E4F-DFFE-405A-A858-8920376B267D" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis serracula Ng & Edds 2005" order="Siluriformes" pageNumber="13" phylum="Chordata" rank="species" species="serracula">P. serracula</taxonomicName>
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from its congeners, especially
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<taxonomicName id="7EE55200D0D38B6F9AE1117E5B2275BA" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="13" phylum="Chordata" rank="species" species="sulcata">P. sulcata</taxonomicName>
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(which occurs sympatrically and syntopically with it; see below). The difference is readily apparent in radiographs (Fig. 5), but even without recourse to such techniques, it is possible to see a difference in external morphology caused by the difference in height of the neural spines. The increase in body depth in the region between the dorsal and adipose fins caused by the neural spines in
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<taxonomicName id="A1ED01ADB20CBBA0D8AFE7418C1A2F72" LSID-ZBK="urn:lsid:zoobank.org:act:175A3E4F-DFFE-405A-A858-8920376B267D" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis serracula Ng & Edds 2005" order="Siluriformes" pageNumber="13" phylum="Chordata" rank="species" species="serracula">P. serracula</taxonomicName>
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imparts a somewhat hunched appearance compared to
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<taxonomicName id="4999897818FB79F9F0417D69339A40A2" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="13" phylum="Chordata" rank="species" species="sulcata">P. sulcata</taxonomicName>
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(compare Figs. 3 and 6).
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</paragraph>
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<paragraph id="A62F26C71E2B686CA3E040D2A7590173" pageNumber="13">
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Biplots of the length of the adipose-fin base for
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<taxonomicName id="233E2661B5BA4F2072D93C2FDD17115E" LSID-ZBK="urn:lsid:zoobank.org:act:175A3E4F-DFFE-405A-A858-8920376B267D" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis serracula Ng & Edds 2005" order="Siluriformes" pageNumber="13" phylum="Chordata" rank="species" species="serracula">P. serracula</taxonomicName>
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vs.
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<taxonomicName id="939154F5CF4BAB554C86A2E630BB0492" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="13" phylum="Chordata" rank="species" species="sulcata">P. sulcata</taxonomicName>
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(Fig. 7) and caudal peduncle depth against SL for
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<taxonomicName id="7B82CE98969D09944A2E17793BA58129" LSID-ZBK="urn:lsid:zoobank.org:act:C280D1E1-5F99-419A-94EC-8709045672E0" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis crassicauda Ng & Edds 2005" order="Siluriformes" pageNumber="13" phylum="Chordata" rank="species" species="crassicauda">P. crassicauda</taxonomicName>
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vs.
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<taxonomicName id="DAB7F65045C4841CF0D596714E114513" LSID-ZBK="urn:lsid:zoobank.org:act:175A3E4F-DFFE-405A-A858-8920376B267D" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis serracula Ng & Edds 2005" order="Siluriformes" pageNumber="13" phylum="Chordata" rank="species" species="serracula">P. serracula</taxonomicName>
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and
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<taxonomicName id="163B9E9F3A07FE9DBBEA2EC85BADCDD5" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="13" phylum="Chordata" rank="species" species="sulcata">P. sulcata</taxonomicName>
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(Fig. 8) show that the regression lines are significantly different (ANCOVA; P<0.05). Likewise, biplots of eye diameter against SL for for
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<taxonomicName id="E3FEAC103C62F828F1D8F0DC6C4A9AFD" LSID-ZBK="urn:lsid:zoobank.org:act:C280D1E1-5F99-419A-94EC-8709045672E0" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis crassicauda Ng & Edds 2005" order="Siluriformes" pageNumber="13" phylum="Chordata" rank="species" species="crassicauda">P. crassicauda</taxonomicName>
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vs.
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<taxonomicName id="58C2BACE2EAD0C72037FBCE6E1B54462" LSID-ZBK="urn:lsid:zoobank.org:act:175A3E4F-DFFE-405A-A858-8920376B267D" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis serracula Ng & Edds 2005" order="Siluriformes" pageNumber="13" phylum="Chordata" rank="species" species="serracula">P. serracula</taxonomicName>
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and
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<taxonomicName id="795990398E667D54F790D9F123B4DD29" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="13" phylum="Chordata" rank="species" species="sulcata">P. sulcata</taxonomicName>
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(Fig. 9) are also significantly different (ANCOVA; P<0.05).
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</paragraph>
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<paragraph id="F05B61847E1D5D8DA2CA7E5A83245C89" lastPageNumber="15" pageNumber="14">
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<taxonomicName id="C9343852468B35C9AE1CB2D1653F0557" LSID-ZBK="urn:lsid:zoobank.org:act:175A3E4F-DFFE-405A-A858-8920376B267D" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis serracula Ng & Edds 2005" order="Siluriformes" pageNumber="14" phylum="Chordata" rank="species" species="serracula">Pseudecheneis serracula</taxonomicName>
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was found syntopically with
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<taxonomicName id="5197FE5B80403CF5ABB138DB08020554" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="14" phylum="Chordata" rank="species" species="sulcata">P. sulcata</taxonomicName>
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in the Seti River (the differences among the three species of
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<taxonomicName id="825AF91357067CC7BBD55DE270BBC53E" LSID-ZBK="urn:lsid:zoobank.org:act:0A1502AF-3B84-4BA1-95C1-C24D72CCC5EE" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis Blyth 1860:154" order="Siluriformes" pageNumber="14" phylum="Chordata" rank="genus">Pseudecheneis</taxonomicName>
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known from the Ganges River drainage are highlighted in Table 3). Sisorid congeners occurring syntopically have been noted in several genera, e.g.
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<taxonomicName id="90B2BE5697D87B9982CAE3BD55B9A2AB" LSID-ZBK="urn:lsid:zoobank.org:act:188E1893-9C92-49FC-9F84-1B096BA2C562" family="Sisoridae" genus="Bagarius" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Bagarius Bleeker 1854:121" order="Siluriformes" pageNumber="14" phylum="Chordata" rank="genus">Bagarius</taxonomicName>
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,
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<taxonomicName id="88D3EB197A88447D707567C414200C9E" LSID-ZBK="urn:lsid:zoobank.org:act:FA21FA6F-AC80-43FF-ABE5-FE7A17E958A2" family="Sisoridae" genus="Gagata" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Gagata Bleeker 1858:204, 206" order="Siluriformes" pageNumber="14" phylum="Chordata" rank="genus">Gagata</taxonomicName>
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,
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<taxonomicName id="12F8251A5804E69C9AFAF16802DD3BEA" LSID-ZBK="urn:lsid:zoobank.org:act:C4304186-4FD4-4672-BDF1-AC51D2C01419" family="Sisoridae" genus="Glyptothorax" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Glyptothorax Blyth 1860:154" order="Siluriformes" pageNumber="14" phylum="Chordata" rank="genus">Glyptothorax</taxonomicName>
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,
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<taxonomicName id="C3C73099BE41C4D7AD349145B3CA0053" LSID-ZBK="urn:lsid:zoobank.org:act:F461FB4B-8C79-4B5C-8C7F-E115BD79B6AE" family="Sisoridae" genus="Nangra" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Nangra Day 1877:493" order="Siluriformes" pageNumber="14" phylum="Chordata" rank="genus">Nangra</taxonomicName>
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(DeWitt, 1960; Roberts, 1983; Edds, 1993; Roberts & Ferraris, 1998). It is common to find coexisting mixed-species groups of related fishes (Matthews, 1998), although hypotheses of resource partitioning (e.g. Zaret & Rand, 1971; Werner et al, 1977) would predict otherwise. Matthews (1998) suggested that fishes in heterospecific schools may gain information or other benefits. Such groupings might increase foraging efficiency or enhance detection and avoidance of predators (Boucher et al., 1982; Allan, 1986; Allan and Pitcher, 1986; Pitcher, 1986). Gorman (1988) reported feeding associations between two species of
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<taxonomicName id="9924231792C54EAAAA1739C8F3E75B73" LSID-ZBK="urn:lsid:zoobank.org:act:D94C8C47-A4DF-4C1E-8D24-0036F11FAFCF" family="Cyprinidae" genus="Notropis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Notropis Rafinesque 1818:204" order="Cypriniformes" pageNumber="14" phylum="Chordata" rank="genus">Notropis</taxonomicName>
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(Cyprinidae), and Greenberg (1991) noted similar interactions among three species of
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<taxonomicName id="845FFC1134E0FB5585EF3A4D9BC1E267" LSID-ZBK="urn:lsid:zoobank.org:act:581B2792-A5D8-4F1A-9029-65BAD4C03674" family="Percidae" genus="Percina" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Percina Perca Haldeman 1842:330" order="Perciformes" pageNumber="14" phylum="Chordata" rank="genus">Percina</taxonomicName>
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(Percidae). Mendelson (1975) concluded that multispecific schooling by four species of cyprinids might gain them anti-predator benefit. Moyle & Li (1979) and Allan (1986) suggested that rare fish species might benefit by hiding in groups of one or more other species that were more abundant. A few fishes enter into more complex symbioses via nest associations, some of which may be mutualistic (Matthews, 1998).
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</paragraph>
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<paragraph id="22C82CC3D07CA049D68A05C180FB1F3C" pageNumber="16">
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It is possible that the material we identify as
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<taxonomicName id="05AAD7F752997BD81B452DD319F66B23" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="16" phylum="Chordata" rank="species" species="sulcata">P. sulcata</taxonomicName>
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from the Seti River is not conspecific with
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<taxonomicName id="2AA8D2C6B06D8D2A5DF5BB9CA4A8FA65" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="16" phylum="Chordata" rank="species" species="sulcata">P. sulcata</taxonomicName>
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s. str., given that
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<taxonomicName id="857DAF70722212762DBF4ED3E1871320" LSID-ZBK="urn:lsid:zoobank.org:act:0A1502AF-3B84-4BA1-95C1-C24D72CCC5EE" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName-ZBK="Pseudecheneis Blyth 1860:154" order="Siluriformes" pageNumber="16" phylum="Chordata" rank="genus">Pseudecheneis</taxonomicName>
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species appear to have restricted distributions (they are not found below elevations of ca. 150 m asl) and that the type locality of
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<taxonomicName id="BC215B2CB241467D34CEAC7FB3ABA7C7" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="16" phylum="Chordata" rank="species" species="sulcata">P. sulcata</taxonomicName>
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is in the tributaries of the Brahmaputra River in the Khasi Hills, India, a considerable distance to the southeast. A separate study by HHN is examining variation in
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<taxonomicName id="7654180002B8B64DE9ECA6373702CE5E" family="Sisoridae" genus="Pseudecheneis" higherTaxonomySource="CoL" kingdom="Animalia" order="Siluriformes" pageNumber="16" phylum="Chordata" rank="species" species="sulcata">P. sulcata</taxonomicName>
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throughout its range, and will include a redescription of the species and discussion of its diagnostic characters.
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |