Cordylancistrus Isbruecker

Francisco Provenzano & Nadia Milani, 2006, Cordylancistrus nephelion (Siluriformes, Loricariidae), a new and endangered species of suckermouth armored catfish from the Tuy River, north-central Venezuela., Zootaxa 1116, pp. 29-41: 30

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Cordylancistrus Isbruecker


[[ Cordylancistrus Isbruecker  ZBK  ]]

The genus Cordylancistrus  ZBK  was described by Isbrücker (1980) with C. torbesensis (Schultz, 1944)  as the type and only species. Isbrücker (1980: 48) stated that: “ Cordylancistrus  ZBK  seems related to the genus Lasiancistrus  , from which it can easily be distinguished by its exceptionally wide head”. Pérez and Provenzano (1996) described C. perijae  ZBK  , indicated some external characters that define the genus Cordylancistrus  ZBK  and postulated a close relationship between Cordylancistrus  ZBK  and the genus Chaetostoma  ZBK  . They also presented a biogeographic hypothesis on the distribution of C. torbesensis  and C. perijae  ZBK  . Isbrücker (2001) included in the genus Cordylancistrus  ZBK  the species: C. daguae  , C. perijae  ZBK  , C. platycephalus  , C. platyrhynchus  and C. torbesensis  , without comment. Fisch-Muller (2003) listed the same five species of Cordylancistrus  ZBK  . Armbruster (2004) indicates that species of the genera Chaetostoma  ZBK  , Leptoancistrus  ZBK  , Dolichancistrus  ZBK  and Cordylancistrus  ZBK  together form a monophyletic group, but that Cordylancistrus  ZBK  is apparently not monophyletic and pointed out that only one basic difference (naked snout) was found between the species of Chaetostoma  ZBK  and the species assigned to Leptoancistrus  ZBK  , Dolichancistrus  ZBK  and Cordylancistrus  ZBK  . He transferred Cordylancistrus platyrhynchus  to the genus Chaetostoma  ZBK  and presented a new diagnosis for Chaetostoma  ZBK  while maintaining the rest of the genera. Apparently, the recognition of genera and the assignment of species to a genus are controversial. Transitory, we agree with Isbrücker (2001) and Fisch-Muller (2003) and accept five species in the genus Cordylancistrus  ZBK  .