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''Chthonosaurus'' is an extinct genus of therocephalian therapsid from the Late Permian of Russia. It belongs to the family Akidnognathidae. The type species ''Chthonosaurus velocidens'' was named in 1955. ==References== 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「Chthonosaurus」の詳細全文を読む スポンサード リンク
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