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Bisatoceratidae is a family of Late Paleozoic ammonites now included in the Thalassoceratoidea characterized by thick-discoidal to subglobular, involute shells in which lobes are simple. Some forms have spiral ornamentation. Bisatoceratidae was originally a subfamily of the Goniatitidae as Bisatoceratinae, named by Miller and Furnish, 1957, and introduced in the Treatise on Invertebrate Paleontology, Part L, 1957. Its relation to the Thalassoceratidae is tenuous. ==References== * *Bisatoceratidae in (GONIAT ) 6/14/12 *(【引用サイトリンク】url=http://paleodb.org/cgi-bin/bridge.pl?a=checkTaxonInfo&taxon_no=93048&is_real_user=1 ) 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「Bisatoceratidae」の詳細全文を読む スポンサード リンク
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