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Plagiostomoceras : ウィキペディア英語版 | Plagiostomoceras
''Plagiostomoceras'' is an orthocerid cephalopod from the lower Paleozoic (Upper Ordovician to Lower Devonian) of Europe and Australia. Shells of ''Plagiostomoceras'' are long slender orthocones with circular to slightly depressed cross sections. Sutures are straight or slightly oblique and may have faint lateral lobes. The siphuncle is central or offset, probably ventrally. The aperture is strongly oblique, sloping adapically toward the presumed venter. ''Plagiostomoceras'' is included in the Michelinoceratinae, a subfamily of the Orthoceratidae. ==See also==
*List of nautiloids
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「Plagiostomoceras」の詳細全文を読む
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