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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 Acynodon ： ウィキペディア英語版 Acynodon ''Acynodon'' is an extinct genus of alligatoroid crocodilian. When first described it was placed within the family Alligatoridae, but has since been reclassified as a globidontan. It is the oldest and most primitive globidontan known to date, with fossils being found from France, Spain, Italy, and Slovenia. ''Acynodon'' first appeared during the early Campanian stage of the Late Cretaceous and went extinct during the Cretaceous–Paleogene extinction event at the Cretaceous–Paleogene boundary. The skull of ''Acynodon'' is extremely brevirostrine; it had a very short and broad snout compared to other known alligatorids. Its dentition was quite derived, with enlarged molariform teeth and a lack of maxillary and dentary caniniform teeth, presumably an adaptation to feed on slow prey with hard shells.〔 The paravertebral osteoderms of ''Acynodon'' were distinctively double-keeled. ==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「Acynodon」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.