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| image = Coroniceras rotiforme.JPG | image_caption = ''Coroniceras rotiforme'' | regnum = Animalia | phylum = Mollusca | classis = Cephalopoda | subclassis = Ammonoidea | ordo = Ammonitida | superfamilia = Psilocerataceae | familia = Arietitidae | subfamilia = Arietitinae | genus = ''Coroniceras'' | genus_authority = Arkell (1947) | subdivision_ranks = Species | subdivision = * ''C. bucklandi'' * ''C. charlesi'' * ''C. rotiforme'' * ''C. validanfractum'' | synonyms = * Arnioceratoides Spath 1922 * Epammonites Spath 1922 * Pararnioceras * Primarietites Buckman 1926, * Saccaiaceras Nannarone 2002 * Venturi Nannarone 2002 }} ''Coroniceras'' is a genus in the Arietitidae, a family in the ammonitid superfamily Psiloceratiaceae, from the lower Sinermurian stage in the Lower Jurassic. It is a sub zone ammonite of the ''Arnioceras semicostotum'' Zone ''Coroniceras'' has a thin discoidal form with a circular whorl section, arched venter, single tall keel, and few but strong ribs. ''Coroniceras'' is included in the subfamily Arietitinae Fossils of ''Coroniceras bucklandi'' are commonly found at Lyme Regis, Dorset Coast, England in the higher limestones of the Blue Lias.〔Davies, G. M. 1964. ''The Dorset Coast'' London: Adam and Charles Black.〕 ==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「Coroniceras」の詳細全文を読む スポンサード リンク
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