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Quebecoceras : ウィキペディア英語版 | Quebecoceras
''Quebecoceras'' is an extinct genus from the nautiloid order Ellesmerocerida that lived during the Gasconadian Stage at the beginning of the Early Ordovician. ''Quebecoceras'' is a cyrtoconic, similar to ''Dakeoceras'' and ''Paradakeoceras'' except for having a circular cross section and more persistent curvature and rate of expansion. ''Paradakeoceras'' differs in having a somewhat flattened venter. The only known species, ''Quebecoceras quebecense'', is half again a large as the largest known ''Dakeoceras'', making it a fairly large ellesmeroceratid genus. ==See also==
*List of nautiloids
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「Quebecoceras」の詳細全文を読む
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