Biology: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. (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

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.

Bidentalia

Rastodon procurvidens       Kunpania scopulusa     Cryptodontia     Daqingshanodon limbus     Keyseria benjamini       Geikiidae   Idelesaurus tataricus       Bulbasaurus phylloxyron   Geikiinae   Aulacephalodon bainii       Pelanomodon moschops       Geikia elginensis     Geikia locusticeps                 Mdomowabata trilobops       Odontocyclops whaitsi     Rhachiocephalidae   Kitchinganomodon crassus     Rhachiocephalus magnus     Oudenodontidae   Oudenodon bainii       Tropidostoma dubium     Australobarbarus spp.                 Dicynodontoidea Elphidae   Gordonia traquairi       Interpresosaurus blomi       Elph borealis     Katumbia parringtoni           other Dicynodontoidea

References

Template:Anomodontia Wikidata ☰ Q5190918 entry