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Qiannanites
''Qiannanites'' is a goniatitid genus from the lower Carboniferous included in the Prodromitidae, which is part of the superfamily Karagandocerataceae, now known as the Karagandoceratoidea. 〔(Qiannanites ) in Fossil Works 〕 ==Diagnosis== The Shell of ''Qiannanites'' is discoidal with a sharp venter, small umbilicus and rather high aperture. Ribs are faint. Coiling in involute, leaving only the outer whorl exposed. The ventral lobe of the suture is bifurcate with pronounced acute prongs
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「Qiannanites」の詳細全文を読む
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