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Craspedodiscus (ammonite) : ウィキペディア英語版 | Craspedodiscus (ammonite)
''Craspedodiscus'', named by Spath in 1924, is a cephalopod genus in the ammonite superfamily Perisphinctaceae from the mid Early Cretaceous (Hauterivian-Barremian) of Northern Europe and Siberia that lived some 125 Ma. ''Craspedodiscus'' is discoidal with laterally compressed whorls and a narrowly rounded venter, covered with fine ribbing. It is placed in the subfamily Simbirskitinae in the family Olcostephanitidae. ==References==
*Treatise on Invertebrate Paleontology, Part L Ammonoidea ; Geological Society of America and Univ of Kansas press, 5th printing, 1990. (p. L350)
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「Craspedodiscus (ammonite)」の詳細全文を読む
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