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''Ptycholepis'' is an extinct genus of prehistoric bony fish having the head and opercular bones ornamented with ridges of ganoin, minute teeth, and thick scales (which are much longer than deep and are grooved longitudinally on the outer side). File:Ptycholepis bollensis.jpg|''Ptycholepis bollensis'' File:Ptycholepis bollensis - Holzmaden.jpg|''Ptycholepis bollensis'' File:Ptycholepis bollensis - Lyme Regis.jpg|''Ptycholepis'' ==See also== * Prehistoric fish * List of prehistoric bony fish 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「Ptycholepis」の詳細全文を読む スポンサード リンク
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