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|image = Stephanoceratidae - Kosmoceras spinosum.jpg |image_caption = Fossil shell of ''Kosmoceras spinosum'' from Calvados (France), on display at Galerie de paléontologie et d'anatomie comparée in Paris |fossil_range = |regnum=Animalia |classis = Cephalopoda |subclassis = Ammonoidea |ordo = Ammonitida |superfamilia = Stephanocerataceae |familia = Kosmoceratidae |genus = Kosmoceras | binomial = ''K. spinosum'' | binomial_authority = (Sowerby 1826) }} ''Kosmoceras spinosum'' is a moderately evolute ammonite species from the Callovian (Middle Jurassic), lasting between 163.5 and 166.1 Ma. 〔 (The Paleobiology Database )〕 Shells of ''Kosmoceras spinosum'' can reach a diameter of about .〔(Ammonites )〕 ==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「Kosmoceras spinosum」の詳細全文を読む スポンサード リンク
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