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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Listrura ： ウィキペディア英語版 Listrura ''Listrura'' is a genus of pencil catfishes native to South America. ==Taxonomy== ''Listrura'' was first described in 1988 for two species from southeastern Brazil, the first record of the subfamily Glanapteryginae outside of the Amazon River basin. It was described for the species ''L. nematopteryx'' and ''L. camposi''; ''L. camposi'' had been assigned to the genus ''Eremophilus'', while ''L. nematopteryx'' had been misidentified as another species of ''Eremophilus''.〔 ''L. tetraradiata'' was described in 2002 from the Rio de Janeiro State in Brazil. ''L. boticario'' was described later in 2002 from southern Brazil.〔 ''L. picinguabae'' was described in 2006. This genus is currently monophyletic.〔 With the description of ''L. tetraradiata'' in 2003, it was hypothesized that ''L. tetraradiata'' possibly constitutes the sister group to a clade comprising the only other two previously described species of ''Listrura'', ''L. camposi'' and ''L. nematopteryx''.〔 As of 2006, two species of ''Listrura'', ''L. camposi'' and ''L. boticario'', were known only from their holotypes. The lack of osteological information for these species impedes a complete analysis of phylogenetic relationships within the genus. It was hypothesized that ''L. nematopteryx'' and ''L. picinguabae'' comprise a monophyletic assemblage, given the fact that the pectoral fin of these species consists of a single ray and the ray is in the form of a long filament, a condition not present in any other trichomycterids thus far described.〔 ''Listura'' is the most basal member of the subfamily Glanapteryginae; it is sister to a clade formed by the other three genera, ''Glanapteryx'', ''Pygidianops'', and ''Typhlobelus''.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Listrura」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.