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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 Beyrichoceras ： ウィキペディア英語版 Beyrichoceras ''Beyrichoceras'' is a genus belonging to the Goniatitid family, Maxigoniatitidae 〔(Paleobioloby-Beyrichoceras ) 12/08/09〕 that lived during the Mississippian Period (Early Carboniferous) ==Description== ''Beyrichoceras'' can be recognized by its small, thickly discoidal shell with small umbilicus, deep dorsal impression, arched flanks and rounded venter 〔Miller, Furnish, and Schindewolf, 1957, Paleozoic Ammonoidea, Treatise on Invertebrate Paleontology, Part L, Mollusca 4.〕 The ventral lobe of the suture is bifurcated, wide at its base, narrowing adapically, ending in a pair of outwardly turned prongs separated by a low median saddle. The first lateral lobe is similar in size to the ventral lobe; broad, V-shaped, and more or less symmetrical. The umbilical lobe, like the first lateral lobe, is broad, V-shaped, and fairly symmetrical, only much shallower. The dorsal lobe is long and narrow, closely flanked by narrow internal lobes. 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「Beyrichoceras」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.