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Cetopsidae
The Cetopsidae are a small family of catfishes (order Siluriformes), commonly called the whale catfishes.〔
==Taxonomy==
This family contains five genera divided into two subfamilies, Cetopsinae and Helogeneinae.〔 Helogeneinae was previously a family-level group, but now it has been reclassified as a subfamily of Cetopsidae. This subfamily contains four species in the genus ''Helogenes''.〔 The subfamily Cetopsinae contains four genera. ''Cetopsidium'' contains six species, ''Cetopsis'' contains 21 species, ''Denticetopsis'' contains seven species, and ''Paracetopsis'' contains three species; this makes a total of 37 cetopsines.〔 The genera have been changed as recenetly as 2005 with the genera ''Bathycetopsis'', ''Hemicetopsis'', and ''Pseudocetopsis'' set in synonymy with ''Cetopsis'' and the description of the new genus ''Cetopsidium''.
''Cetopsidium'' is the sister group to the rest of Cetopsinae. ''Denticetopsis'' forms the next sister group to the remaining cetopsine genera. The tribes Cetopsidiini, Denticetopsini, and Cetopsini are erected for the cetopsine genera.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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