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''Belemnites'' is a genus of an extinct group of cephalopods belonging to the order Belemnitida. These cephalopods existed in the Early Jurassic period from the Hettangian age (196.5–199.6 mya) to the Toarcian age (175.6–183.0). They were fast-moving nektonic carnivores. Be careful not to confuse the scientific name ''Belemnites'' of this genus with the common name of the cephalopods included in the extinct order Belemnitida (commonly referred to as "Belemnites"). ==Species== *''Belemnites calloviensis'' *''Belemnites hastati'' *''Belemnites hastatus'' *''Belemnites paxillosus'' 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「Belemnites (genus)」の詳細全文を読む スポンサード リンク
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