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| regnum = Animalia | phylum = Mollusca | classis = Cephalopoda | subclassis = Ammonoidea | ordo = Ammonitida | familia = Placenticeratidae | genus = ''Karamaiceras'' | genus_authority = Sokolov, 1967 }} ''Karamaiceras'' is an extinct cephalopod genus belonging to the Ammonoidea that lived during the Early Cretaceous. Its shell is involute, smooth and rather compressed, with the outer whorl strongly embracing the inner whorls. Sides are flattish to slightly convex and slope inwardly toward a narrowly rounded venter. ==References== *(Karamaiceras-Sokolov ) in Russian. 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「Karamaiceras」の詳細全文を読む スポンサード リンク
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