Cryptodontia

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. showing the phylogenetic placement of Cryptodontia:
Below is a cladogram by Angielczyk and Otoo, 2025 in their description of the species Mdomowabata trilobops, depicting the interrelationships of cryptodonts in more detail.