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The Ochetoceratinae is a subfamily within the Oppeliidae from the Upper Jurassic, shells of which are typically oxycones with a tricarinate venter and falcoid ribbing, commonly divided by a medain lateral groove or fillet. The median (middle) keel is the tallest. The Ochetoceratinae may be polyphyletic, derived from both the Oppeliidae and Hecticoceratinae as suggested by differences in the included genera. ==Genera== The following genera are included in the Ochetoceratinae :''Ochetoceras'', type :''Campylites'' :''Cubaochetoceras'' :''Cymaceras'' :''Fehlmanites'' :''Oxydiscites'' :''Trimarginites'' The median lateral groove is well developed in ''Ochetoceras'' and ''Fehlmanites'', less discernible in ''Cymaceras'', but missing or difficult to make out in the other four. 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「Ochetoceratinae」の詳細全文を読む スポンサード リンク
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