90 lines
12 KiB
XML
90 lines
12 KiB
XML
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<mods:titleInfo id="77665CD271F8B80B0B1B44B2102C6B84">
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<mods:title id="9476BBC6132F07C99F6B80060824217D">Three new Parananochromis species (Teleostei, Cichlidae) from Gabon and Cameroon, Central Africa.</mods:title>
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<mods:name id="72601AD9554B45DB3952091743E9B94B" type="personal">
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<mods:namePart id="0DA0A9B68501EEE367EC0D9A38B4E744">Anton Lamboj</mods:namePart>
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<mods:roleTerm id="55FD0FF7F7B585A6F6F1CF8E3F0894CC">Author</mods:roleTerm>
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<mods:namePart id="CA0CA4D69EEC4EB918DBB355044BC765">Melanie L. J. Stiassny</mods:namePart>
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<mods:title id="61731A97E250528778ACFF6FF1B725C0">Zootaxa</mods:title>
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<mods:part id="6410BBFA6E04781B8CCA544821460C1E">
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<mods:date id="3FB39C159A9B750014956883D03C255E">2003</mods:date>
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<mods:detail id="B6E6218606DEBCE2A6C8F0707F0F034C" type="volume">
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<mods:number id="072F42414383D9707FF6CB7D0B19596F">209</mods:number>
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<mods:classification id="597835EB14E4459C33DAC3D4EB1C516A">journal article</mods:classification>
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<treatment id="F9D970BB8DD171DD0FE0FBD5A54F6AEC" ID-DOI="http://doi.org/10.5281/zenodo.6273830" ID-GBIF-Taxon="100123497" ID-Zenodo-Dep="6273830" LSID="urn:lsid:plazi:treatment:F9D970BB8DD171DD0FE0FBD5A54F6AEC" httpUri="http://treatment.plazi.org/id/F9D970BB8DD171DD0FE0FBD5A54F6AEC" lastPageNumber="17" pageNumber="16">
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<subSubSection id="198A3F29CC01CC438C1DFE61B1D901C2" type="nomenclature">
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<paragraph id="547F27439641B4AE10ECB58DA82BE457">
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[[
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<taxonomicName id="66E57468C173B7A62C1C27169E705843" ID-CoL="63LMK" ID-ENA="1543267" LSID-ZBK="urn:lsid:zoobank.org:act:6D8CF662-71F9-4EC2-879B-BBB6C7EE1AC8" class="Actinopterygii" family="Cichlidae" genus="Parananochromis" kingdom="Animalia" lsidName-ZBK="Parananochromis Greenwood 1987:174" order="Perciformes" pageNumber="16" phylum="Chordata" rank="genus">Parananochromis Greenwood</taxonomicName>
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]]
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</paragraph>
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</subSubSection>
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<subSubSection id="6F5A82AD2CE8CC424CAE0AEC0FB4AF91" type="discussion">
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<paragraph id="DE595475FEC1E2948A3B67133D57BF98" pageNumber="16">
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Discussion. The combination of the possession of four openings of the sensory canal system in the lachrymal (versus 5), 12 circumpeduncular scales (versus 14-16), and a Haplochromis-type(versus a Tilapia-type) of neurocranial apophysis, characterizes the two genera,
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<taxonomicName id="61D2FAC7FAB22D2448F412BC1368EF48" LSID-ZBK="urn:lsid:zoobank.org:act:6D8CF662-71F9-4EC2-879B-BBB6C7EE1AC8" class="Actinopterygii" family="Cichlidae" genus="Parananochromis" kingdom="Animalia" lsidName-ZBK="Parananochromis Greenwood 1987:174" order="Perciformes" pageNumber="16" phylum="Chordata" rank="genus">Parananochromis</taxonomicName>
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and
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<taxonomicName id="1DDF0970542BEE622B5079A510DAC60B" LSID-ZBK="urn:lsid:zoobank.org:act:C773E33B-0CFA-459E-9DB7-5832CC9E7DF6" class="Actinopterygii" family="Cichlidae" genus="Nanochromis" kingdom="Animalia" lsidName-ZBK="Nanochromis Pellegrin 1904:(163) 273" order="Perciformes" pageNumber="16" phylum="Chordata" rank="genus">Nanochromis</taxonomicName>
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. Greenwood (1987) considered the latter two features as derived within the chromidotilapiine lineage and therefore as evidence of a sistergroup relationship between the two genera. The distinction between
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<taxonomicName id="C3A58FE79CE9D322025938C1F4A8241D" LSID-ZBK="urn:lsid:zoobank.org:act:C773E33B-0CFA-459E-9DB7-5832CC9E7DF6" class="Actinopterygii" family="Cichlidae" genus="Nanochromis" kingdom="Animalia" lsidName-ZBK="Nanochromis Pellegrin 1904:(163) 273" order="Perciformes" pageNumber="16" phylum="Chordata" rank="genus">Nanochromis</taxonomicName>
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and most of the species currently included in
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<taxonomicName id="574C4FEEB0E2231EAD9F6D1B30D68D72" LSID-ZBK="urn:lsid:zoobank.org:act:6D8CF662-71F9-4EC2-879B-BBB6C7EE1AC8" class="Actinopterygii" family="Cichlidae" genus="Parananochromis" kingdom="Animalia" lsidName-ZBK="Parananochromis Greenwood 1987:174" order="Perciformes" pageNumber="16" phylum="Chordata" rank="genus">Parananochromis</taxonomicName>
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was discussed by Thys van den Audenaerde (1968), and later by Greenwood (1987) who diagnosed
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<taxonomicName id="B62A2B03C09D50781BCCCE0864593019" LSID-ZBK="urn:lsid:zoobank.org:act:C773E33B-0CFA-459E-9DB7-5832CC9E7DF6" class="Actinopterygii" family="Cichlidae" genus="Nanochromis" kingdom="Animalia" lsidName-ZBK="Nanochromis Pellegrin 1904:(163) 273" order="Perciformes" pageNumber="16" phylum="Chordata" rank="genus">Nanochromis</taxonomicName>
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on the basis of a number of derived features (e.g., two bones in the infraorbital series, at least the last 3 or 4 pored scales of the upper lateral line contiguous with dorsal fin base, and a low supraoccipital crest). However, no such diagnosis was presented for
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<taxonomicName id="2E0AFF8ADAEAAF43DCDFEB955CE18F24" LSID-ZBK="urn:lsid:zoobank.org:act:6D8CF662-71F9-4EC2-879B-BBB6C7EE1AC8" class="Actinopterygii" family="Cichlidae" genus="Parananochromis" kingdom="Animalia" lsidName-ZBK="Parananochromis Greenwood 1987:174" order="Perciformes" pageNumber="16" phylum="Chordata" rank="genus">Parananochromis</taxonomicName>
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, which remains uncharacterised by uniquely derived features and possibly therefore a paraphyletic assemblage. In the course of the present study we have found no evidence that could be used to support the monophyly of
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<taxonomicName id="B6956EC097005E0AF70D2A3C6187FB1C" LSID-ZBK="urn:lsid:zoobank.org:act:6D8CF662-71F9-4EC2-879B-BBB6C7EE1AC8" class="Actinopterygii" family="Cichlidae" genus="Parananochromis" kingdom="Animalia" lsidName-ZBK="Parananochromis Greenwood 1987:174" order="Perciformes" pageNumber="16" phylum="Chordata" rank="genus">Parananochromis</taxonomicName>
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. In fact two of the new taxa described herein (
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<taxonomicName id="9DE44476BFFFA867EF3D54DAC76440E9" LSID-ZBK="urn:lsid:zoobank.org:act:DA0D653B-428F-4F7D-9A78-A0D5ABEA62BE" class="Actinopterygii" family="Cichlidae" genus="Parananochromis" kingdom="Animalia" lsidName-ZBK="Parananochromis brevirostris Lamboj & Stiassny 2003:7" order="Perciformes" pageNumber="16" phylum="Chordata" rank="species" species="brevirostris">P. brevirostris</taxonomicName>
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and
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<taxonomicName id="B934798522D06C8E3634DDF311033851" LSID-ZBK="urn:lsid:zoobank.org:act:8B5F6F14-0F12-48F5-A8AF-48E29B8ECF8E" class="Actinopterygii" family="Cichlidae" genus="Parananochromis" kingdom="Animalia" lsidName-ZBK="Parananochromis ornatus Lamboj & Stiassny 2003:12" order="Perciformes" pageNumber="16" phylum="Chordata" rank="species" species="ornatus">P. ornatus</taxonomicName>
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) display an elevation of the upper lateral line (albeit not to the extent found in
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<taxonomicName id="6ABE0A11DF744CEE6B5A292819C11AEB" LSID-ZBK="urn:lsid:zoobank.org:act:C773E33B-0CFA-459E-9DB7-5832CC9E7DF6" class="Actinopterygii" family="Cichlidae" genus="Nanochromis" kingdom="Animalia" lsidName-ZBK="Nanochromis Pellegrin 1904:(163) 273" order="Perciformes" pageNumber="16" phylum="Chordata" rank="genus">Nanochromis</taxonomicName>
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), a reduction of infraorbital elements from five to four (
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<taxonomicName id="0DB4188ADEAEB6C5262E76050E09CC9F" LSID-ZBK="urn:lsid:zoobank.org:act:C773E33B-0CFA-459E-9DB7-5832CC9E7DF6" class="Actinopterygii" family="Cichlidae" genus="Nanochromis" kingdom="Animalia" lsidName-ZBK="Nanochromis Pellegrin 1904:(163) 273" order="Perciformes" pageNumber="16" phylum="Chordata" rank="genus">Nanochromis</taxonomicName>
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has a single tubular element), and the possession of a low crest on the supraoccipital. In these features
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<taxonomicName id="996016754D1706C13751450431777EA9" LSID-ZBK="urn:lsid:zoobank.org:act:DA0D653B-428F-4F7D-9A78-A0D5ABEA62BE" class="Actinopterygii" family="Cichlidae" genus="Parananochromis" kingdom="Animalia" lsidName-ZBK="Parananochromis brevirostris Lamboj & Stiassny 2003:7" order="Perciformes" pageNumber="16" phylum="Chordata" rank="species" species="brevirostris">P. brevirostris</taxonomicName>
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and
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<taxonomicName id="8C66EBF13C8C54A692434FDCB3E0561C" LSID-ZBK="urn:lsid:zoobank.org:act:8B5F6F14-0F12-48F5-A8AF-48E29B8ECF8E" class="Actinopterygii" family="Cichlidae" genus="Parananochromis" kingdom="Animalia" lsidName-ZBK="Parananochromis ornatus Lamboj & Stiassny 2003:12" order="Perciformes" pageNumber="16" phylum="Chordata" rank="species" species="ornatus">P. ornatus</taxonomicName>
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display a trend towards the derived
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<taxonomicName id="7130570BCD11AEF650B76E11163FFEEC" LSID-ZBK="urn:lsid:zoobank.org:act:C773E33B-0CFA-459E-9DB7-5832CC9E7DF6" class="Actinopterygii" family="Cichlidae" genus="Nanochromis" kingdom="Animalia" lsidName-ZBK="Nanochromis Pellegrin 1904:(163) 273" order="Perciformes" pageNumber="16" phylum="Chordata" rank="genus">Nanochromis</taxonomicName>
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condition.
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</paragraph>
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<paragraph id="8C7AFBCE7E06CF978095FEC6E07E547D" pageNumber="17">
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Final resolution of the phylogenetic status of the genus
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<taxonomicName id="86FCDE1C88CB928BAD9CB0DBA93188B4" LSID-ZBK="urn:lsid:zoobank.org:act:6D8CF662-71F9-4EC2-879B-BBB6C7EE1AC8" class="Actinopterygii" family="Cichlidae" genus="Parananochromis" kingdom="Animalia" lsidName-ZBK="Parananochromis Greenwood 1987:174" order="Perciformes" pageNumber="17" phylum="Chordata" rank="genus">Parananochromis</taxonomicName>
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(and indeed the other chromidotilapiine genera currently lacking phylogenetic diagnoses) must await a thoroughgoing phylogenetic analysis, a task that is beyond the scope of the current paper. For the time being, and as a pragmatic approach for the purposes of species description, we have assigned the three new species to
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<taxonomicName id="23473E4465C7B79B57A5C246B027728A" LSID-ZBK="urn:lsid:zoobank.org:act:6D8CF662-71F9-4EC2-879B-BBB6C7EE1AC8" class="Actinopterygii" family="Cichlidae" genus="Parananochromis" kingdom="Animalia" lsidName-ZBK="Parananochromis Greenwood 1987:174" order="Perciformes" pageNumber="17" phylum="Chordata" rank="genus">Parananochromis</taxonomicName>
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, while alerting readers to the possibility that generic reassignment may be necessary once a fuller understanding of the generic limits and relationships among chromidotilapiines is gained.
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |