Cryptodontia

Cryptodontia Temporal range: Middle Permian - Late Triassic
Skull of Oudenodon latirostris
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Synapsida
Order:	Therapsida
Infraorder:	†Dicynodontia
Stem:	†Bidentalia
Clade:	†Cryptodontia Owen, 1860
Subgroups
See text.
Synonyms
Cryptodontidae

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.^[1]

Classification

Below is a cladogram from Kammerer et al. (2011) showing the phylogenetic placement of Cryptodontia:

Dicynodontia	Eodicynodon Pylaecephalidae Eumantellidae Endothiodontidae  Therochelonia   Emydopoidea  Emydopidae Kingoriidae Cistecephalidae Myosauridae  Bidentalia   Cryptodontia  Rhachiocephalidae Oudenodontidae Geikiidae  Dicynodontoidea  "Dicynodon" Lystrosauridae  Kannemeyeriiformes  Shansiodontidae Kannemeyeriidae Stahleckeriidae Dinodontosauridae

References

1. Kammerer, C.F.; Angielczyk, K.D. (2009). "A proposed higher taxonomy of anomodont therapsids" (PDF). Zootaxa 2018: 1–24.