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Franklinoceras : ウィキペディア英語版 | Franklinoceras
''Franklinoceras'' is an extinct cephalopod genus from the nautiloid order, Discosorida. Nautiloids comprise a subclass of shelled cephalopods that were once diverse and numerous but are now represented by only a handful of species. ''Franklinoceras'' is an early discosorid from the family Reudemannoceratidae, similar to the ancestral ''Reudemannoceras''. Both are from the early Middle Ordovician; both have endogastric cyrtocones, except in ''Franklinoceras'' they are compressed so as to be higher than wide, rather than the other way around as in ''Reudemannoceras'' (Teichert, 1964). ==See also==
* Reudemannoceratidae for further discussion of ''Reudemannoceras'' and ''Franklinoceras'' * * Discosorida * Nautiloidea * * 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「Franklinoceras」の詳細全文を読む
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