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Pseudancistrus : ウィキペディア英語版 | Pseudancistrus
''Pseudancistrus'' is a genus of suckermouth armored catfishes native to South America. ==Taxonomy== ''Pseudancistrus'' is a genus in the tribe Ancistrini of the subfamily Hypostominae. It was described by Pieter Bleeker in 1862, and redescribed by Jonathan Armbruster in 2004. Currently, there are 18 recognized species distributed in northern South America, with the inclusion of the genera ''Lithoxancistrus'', the species formerly known as ''Hemiancistrus megacephalus'', as well as the most recently described ''Pseudancistrus corantijniensis''.〔 There is no single morphological feature which distinguishes the group from related genera. Despite this, ''Pseudancistrus'' is generally recognized as a monophyletic group. Within the genus there is what is called the ''P. barbatus'' group. This group comprises Guyanese derived ''Pseudancistrus'' bearing hypertrophied odontodes along the snout and nonevertible cheek plates. It includes the four species ''P. barbatus'', ''P. corantijniensis'', ''P. depressus'', and ''P. nigrescens''.
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