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Allocrioceras : ウィキペディア英語版 | Allocrioceras
''Allocrioceras'' is an ammonoid cephalopod from the mid-Cretaceous included in the turrilitacean family Anisoceratidae. Its shell is strongly ribbed and is in the form of a widely open spiral. ==Classification== After its 1907 discovery, the species ''A. hazzardi'' was erroneously classified as ''Crioceras latus'' by Udden. A later 1928 revision by Adkins removed it from the species ''C. latus'' while keeping it as a member of the ''Crioceras'' genus. In 1963 Young gave the species its final classification in a new genus- ''Allocrioceras''.
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「Allocrioceras」の詳細全文を読む
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