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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 Boreaspis ： ウィキペディア英語版 Boreaspis ''Boreaspis'' ("Boreas' Shield") is an extinct genus of primitive jawless fish that lived in the Devonian period. Fourteen different species of ''Boreaspis'' have been found in sandstone of the lagoons and estuaries of Devonian Spitsbergen. ''Boreaspis'' was about long, with a tough shield covering its head, and extra protective spikes protruding from the cheek regions. It also had a long spike-like rostrum on its snout, which would have enhanced the fish's hydrodynamics and was probably also used to root out food buried beneath the substrate. == References == * Long, John A. The Rise of Fishes: 500 Million Years of Evolution Baltimore: The Johns Hopkins University Press, 1996. ISBN 0-8018-5438-5 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「Boreaspis」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.