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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 Belemnacanthus ： ウィキペディア英語版 Belemnacanthus ''Belemnacanthus giganteus'' ("Gigantic arrow-spine") is a large, extinct, barrel-shaped holonematid arthrodire placoderm from Givetian-aged strata of Middle Devonian Eifel, Germany. ''B. giganteus'' is known only from the holotype, a portion of a median dorsal plate with a long, somewhat high, arching crest running down the median line of the exterior/dorsal side of the plate. The plate has an ornamentation of ridges that originate from a point posterior to the preserved portion of the median dorsal plate. Before the plate was identified as that of a holonematid, the plate of ''B. giganteus'' had been successively described as a tremendous spine of an elasmobranch, an agnathan, and lastly, the plate of an antiarch. ==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「Belemnacanthus」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.