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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 Ischyodus ： ウィキペディア英語版 Ischyodus ''Ischyodus'' is an extinct genus of cartilaginous fish belonging to the subclass ''Holocephali'', which includes the modern-day chimaeras. Fossils are known from Europe (including Russia), North America, and New Zealand. ''Ischyodus'' was rather similar to the present-day chimaera ''Chimaera monstrosa'', which is found in the Atlantic Ocean and Mediterranean Sea. Just like ''C. monstrosa'', ''Ischyodus'' had large eyes, a long whip-like tail, small lips, large pectoral fins and dorsal fin, and a dorsal spike attached to the front of the dorsal fin. The spike probably served as a method of protection against predators, and may have been venomous, as it is in modern chimaeras. Dental plates of at least two species, ''Ischyodus rayhaasi'' and ''Ischyodus dolloi'', have been found at several sites in North Dakota.〔Hoganson, J. W. and J. M. Erickson. 2005. A new species of ''Ischyodus'' (Chondrichthyes: Holocephali: Callorhynchidae) from Upper Maastrichtian shallow marine facies of the Fox Hills and Hell Creek formations, Williston Basin, North Dakota, USA. Palaeontology 48: 709-721. 〕 ==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「Ischyodus」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.