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Tristichopterids (Tristichopteridae) were a diverse and successful group of tetrapodomorph fishes living throughout the Middle and Late Devonian. They first appeared in the Givetian stage of the Middle Devonian. Within the group sizes ranged from a few tens of centimeters (''Tristichopterus'') to several meters (''Hyneria'' and ''Eusthenodon''). Some tristichopterids share some of the features of the elpistostegalians, a paraphyletic assemblage of fishes close to the origin of tetrapods. This mainly concerns the shape of the skull and a reduction in size of the posterior fins. An old and persistent notion is that ''Eusthenopteron'' was able to crawl onto land using its fins. However, there is no evidence actually supporting this idea. All tristichopterids went extinct by the end of Late Devonian. ==Genera of Tristichopterids== * ''Cabonnichthys'' * ''Canningius'' * Edenopteron * ''Eusthenodon'' * ''Eusthenopteron'' * ''Hyneria'' * ''Jarvikina'' * ''Langlieria'' * ''Mandageria'' * ''Notorhizodon'' * ''Platycephalichthys'' * ''Tristichopterus'' * ''Heddleichthys'' 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「Tristichopteridae」の詳細全文を読む スポンサード リンク
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