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Newmarracarroceras : ウィキペディア英語版 | Newmarracarroceras
''Newmarracarroceras'' is an ammonite from the early middle Jurassic with a ribbed subinvolute shell with a keel running along the venter, or outer rim. The ubilicus is moderately wide, exposing the inner whorls exposed in part. ''Newmarracarroceras'' has a fairly wide geographic range and includes species previously described under ''Fontannesia''. Related genera include ''Asthenoceras'', ''Fontannesia, ''Guhsania'', and ''Witchellia''. ==References==
*(The Paleobiology Database ''Newmarracarroceras'' entry ) *
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「Newmarracarroceras」の詳細全文を読む
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