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

[[ Cordylancistrus Isbruecker ]]

The genus Cordylancistrus was described by Isbrücker (1980) with C. torbesensis (Schultz, 1944) as the type and only species. Isbrücker (1980: 48) stated that: “ Cordylancistrus 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 , indicated some external characters that define the genus Cordylancistrus and postulated a close relationship between Cordylancistrus and the genus Chaetostoma . They also presented a biogeographic hypothesis on the distribution of C. torbesensis and C. perijae . Isbrücker (2001) included in the genus Cordylancistrus the species: C. daguae , C. perijae , C. platycephalus , C. platyrhynchus and C. torbesensis , without comment. Fisch-Muller (2003) listed the same five species of Cordylancistrus . Armbruster (2004) indicates that species of the genera Chaetostoma , Leptoancistrus , Dolichancistrus and Cordylancistrus together form a monophyletic group, but that Cordylancistrus is apparently not monophyletic and pointed out that only one basic difference (naked snout) was found between the species of Chaetostoma and the species assigned to Leptoancistrus , Dolichancistrus and Cordylancistrus . He transferred Cordylancistrus platyrhynchus to the genus Chaetostoma and presented a new diagnosis for Chaetostoma 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 .