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Acanthaecites : ウィキペディア英語版 | Acanthaecites
''Acanthaecites'' is an extinct cephalopod genus belonging to the ammonoid family Oppeliidae first described by Rollier in 1909. ''Acanthaecites'' both appears and disappears from the fossil record during the Callovian stage of the Jurassic Period. The shell of ''Acanthaecites'' is small, globose and smooth except for a median ventral row of distinct sharp serrations. ==References==
* W.J. Arkell, et al. 1957. Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L, Ammonoidea. University of 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「Acanthaecites」の詳細全文を読む
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