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''Flabellisphinctes'' is small, evolute ammonite genus from the upper Middle Jurassic (Callovian) that lived between 160 and 154 Ma ago. ''Flabellisphinctes'' is included in the subfamily Grossouviinae which is part of the Perisphinctidae. The shell is around 5 cm (abt. 2in) in diameter, with close spaced radial ribs on the inner whorls. Outer whorls with ribs widely spaced, coming off the umbilical shoulder and flattening about mid flank, but dividing near the ventrolateral shoulder into well defined ribs that cross the venter with a kink mid way. Whorl section, suboval compressed with a narrowly arched rim. ==References== *(Flabellisphinctes ) (in French) * (List of cephalopod genera. ) J. Sepkoski 2002. * C. Mangold et S. Elmi (1966), ''Flabellisphinctes'' et ''Choffatia'' (Ammonitina) du Gallovien Moyen de L'ardèghe. () 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「Flabellisphinctes」の詳細全文を読む スポンサード リンク
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