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|regnum = Animalia |phylum = Mollusca |classis = Cephalopoda |subclassis = Ammonoidea |ordo= Ammonitida |familia= Nostoceratidae |genus = ''Bostrychoceras'' |genus_authority = Hyatt, 1900 |subdivision_ranks = Species |subdivision = None catlogged }} ''Bostrychoceras'' is a genus of heteromorph ammonite from the family Nostoceratidae. Fossils have been found in Late Cretaceous sediments in Europe and North America. The shell of ''Bostrychoceras'' begins as a tightly wound helical spire, like that of ''Nostoceras'', from which hangs a U or J shaped body chamber, at least in the adult. The shell is covered with dense, strong, but un-flaired, ribs that are commonly sinuous and oblique. May nor may not have strong constrictions. ==Distribution== Cretaceous of Nigeria, Peru, South Africa, Spain and the United States 〔 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「Bostrychoceras」の詳細全文を読む スポンサード リンク
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