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Astieridiscus : ウィキペディア英語版 | Astieridiscus
|regnum = Animalia |phylum = Mollusca |classis = Cephalopoda |subclassis = Ammonoidea |ordo = Ammonitida |superfamilia = Desmocerataceae |familia = Holcodiscidae |genus = ''Astieridiscus'' |genus_authority = Kilian, 1910 }} ''Astieridiscus'' is an extinct lower Cretaceous ammonite. Its shell evolute, covered by dense, simple or branching, slightly flexuous ribs. The sides are slightly flattened, the venter rounded. ==References==
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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「Astieridiscus」の詳細全文を読む
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