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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 Palaeoniscum ： ウィキペディア英語版 Palaeoniscum ''Palaeoniscum'' is an extinct genus of ray-finned fish from the Permian period of Europe and North America. ''Palaeoniscum'' had a torpedo-shaped body in length, with a deeply forked caudal fin and tall dorsal fin, indicating that it was a fast swimmer. It was probably an active predator, feeding on other fresh water fish. Its sharp teeth could be replaced when lost, a trait also seen in modern day sharks. Like other early ray-finned fish, ''Palaeoniscum'' had air sacs connected to the mouth which served as a primitive swim bladder. ==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「Palaeoniscum」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.