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Cryptodontia is a group of dicynodont therapsids that includes the families Geikiidae, Oudenodontidae, and Rhachiocephalidae. It was first named in 1860 by English paleontologist Richard Owen. Owen intended Cryptodontia to be a family, and the name was later changed to "Cryptodontidae" to reflect this ranking. The name Cryptodontia was restored in 2009 when it was redefined as a larger clade containing several families of dicynodonts. ==Classification== Below is a cladogram from Kammerer ''et al.'' (2011) showing the phylogenetic placement of Cryptodontia: |label2= Bidentalia |2= |label2= Dicynodontoidea |2= }} }} }} }} }} }} }} }} 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「Cryptodontia」の詳細全文を読む スポンサード リンク
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