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Gasconsoceras : ウィキペディア英語版 | Gasconsoceras ''Gasconsoceras'' is a genus of nautiloid cephalopod belonging to the tarphyceroid family Barrandeoceratidae, known from the Middle Silurian. Shells of ''Gasconsoceras'' are rapidly enlarging gyrocones and serpenticones covered by fine transverse and longitudinal striae and prominent dorsal and lateral transverse ribs. A fair degree of mobility is indicated by the deep hyponomic sinus. Other than being between center and venter, the siphuncle is poorly known. ==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「Gasconsoceras」の詳細全文を読む
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