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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 Livoniana ： ウィキペディア英語版 Livoniana ''Livoniana'' is a genus of prehistoric lobe-finned fish which lived during the Devonian period (Givetian - Frasnian stages, about 374 - 391 million years ago).〔Ahlberg, P.E., E. Luksevics and E. Mark-Kurik. 2000. "A near-tetrapod from the Baltic Middle Devonian". ''Paleontology'' 43(3): 533-548.〕 This species is a transitional form between fish and the earliest tetrapods, like ''Tiktaalik'', ''Ichthyostega'' and ''Acanthostega''. Before ''Livoniana'' there was ''Elginerpeton'' and ''Obruchevichthys''. Four legs developed in water, not on land, to better escape waterliving predatory creatures like ''Hyneria''. There were very lush forests, and particularly swamps, where four limbs became very useful to avoid predators. 〔http://www.bbc.co.uk/science/horizon/2000/missinglink_transcript.shtml〕 ==References== 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「Livoniana」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.