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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 Dapedium ： ウィキペディア英語版 Dapedium ''Dapedium'' is an extinct genus of primitive neopterygian ray-finned fish. The first-described finding was an example of ''D. politum'', found in the Lower Lias of Lyme Regis, on the Jurassic Coast of England (Leach 1822). ''Dapedium'' lived in the late Triassic and Jurassic periods. ==Appearance== The various species of ''Dapedium'' ranged from long, and all had an oval to near-circular body. The skin was covered with thick, rhomboid, ganoid (enamel-like) scales. The smallest species so far found is ''D. noricum''. The skull was armoured with bony dermal plates, which were especially plentiful in the orbital region. These bones bore irregular tubercles. The small pectoral and pelvic fins, along with the extended dorsal and anal fins formed a functional unit with the tail.〔 The tail was short and stout, providing the power for a sudden change in direction while the fish was swimming. The upper jaw of ''Dapedium'' was moveable and could protrude from the mouth, enabling a wider gape to capture larger prey. 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「Dapedium」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.