|
| regnum = Animalia | phylum = Mollusca | classis = Cephalopoda | subclassis = Ammonoidea | ordo = Ammonitida | superfamilia = Perisphinctaceae | familia = Perisphinctidae | genus = ''Aulacosphinctoides'' | genus_authority = Spath, 1923 | subdivision_ranks = Species | subdivision = *See text}} ''Aulacosphinctoides'' is an extinct ammonoid cephalopod that lived during the Late Jurassic (Late Kimmeridgian to early Tithonian), included in the ammonitid family Perisphinctidae. The shell of ''Aulacosphinctoides'' is evolute, whorls broadly rounded, ribs sigmoid that mostly bifurcate, but often trifurcate, Lappets present. Closely resembles ''Torquantisphinctes'', differing in having more rounded or depressed whorls and more sigmoid and frequently tiplicate ribbing. The genus ''Aulacosphinctoides''has been found in Somalia, northern India, Japan, Argentina, Mexico, and Madagascar ==References== * 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「Aulacosphinctoides」の詳細全文を読む スポンサード リンク
|