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|regnum = Animalia |phylum = Mollusca |classis = Cephalopoda |subclassis = Ammonoidea |ordo = Ammonitida |subordo= Ancyloceratina |superfamilia = Turrilitoidea |familia= Nostoceratidae |genus = ''Exiteloceras'' |genus_authority = Hyatt, 1894 |subdivision_ranks = Species |subdivision = * ''E. jenneyi'' }} ''Exiteloceras'' is an ammonite genus from the Late Cretaceous.〔 ''Exiteloceras'' was proposed by Alpheus Hyatt in 1894 for heteromorph ammonites with shells that are loosely coiled in a plane, early whorls varying from straight limbs connected by semicircular elbows to elliptical or nearly circular loops, later whorls being elliptical to circular. The whorl section is ovate with the dorsum on the inside curve broader than the venter on the outside. The ribs may be straight or flexuous and mostly slant. Most end with a tubule on the ventrolateral shoulder. The suture is ammonitic. The deeply incised sutural elements are asymmetric, including the double-pronged ventral lobe. ==Distribution== Cretaceous of Egypt, Iraq, California, Colorado, Delaware, Montana, New Mexico, Wyoming. 〔 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「Exiteloceras」の詳細全文を読む スポンサード リンク
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