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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 Beudanticeras ： ウィキペディア英語版 Beudanticeras ''Beudanticeras'' is an extinct cephalopod genus from the Cretaceous period belonging to the ammonoid subclass and included in the family Desmoceratidae. ''Beudanticeras'' has a rather to very compressed shell that is moderately involute, with convex to flat sides and a narrowly arched out rim. Coiling is such that the outer whorl embraces much of the next inner whorl, leaving a small spiraled umblicus. The shell is generally smooth but may have weak ribs but no tubercles. The suture is ammonitic. The derivation of ''Beudanticeras'' may be from ''Uhligella'', although ''Uhligella'' is partly contemporary with early ''Beudanticeras''. Other related genera include ''Beudantiella'', ''Brewericeras'', ''Zurcherella'', and possibly ''Pseudosaynella''. ==References== *(Beudanticeras -Paleodb ) * Arkell, et al. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L (Ammonoidea). Geol Soc of America and Univ Kansas Press. 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「Beudanticeras」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.