†suborder Gymnarthria Case 1910 (tetrapod)
Full reference: E. C. Case. 1910. New or little known reptiles and amphibians from the Permian (?) of Texas. Bulletin of the American Museum of Natural History 28:163-181
Parent taxon: Reptilia according to E. C. Case 1910
Sister taxa: Amblyglossae, Anapsida, Coeluria, Cunichnoides, Enaliosauria, Eupalamopus, Eureptilia, Ganocephala, Glauconia, Ichthyopterygia, Ischyrotherium, Isocampe, Kintneria, Macelognatha, Omosauria, Oolithes, Ornithocephala, Parareptilia, Placodontomorpha, Plectropterna, Proganosauromorpha, Pythonomorpha, Rhamphosauria, Rhizodonta, Sauranodonta, Streptosauria, Testudinata, Theromorpha, Tocosauria, Triaenopus, Zhengichnus
Subtaxa: none
Ecology: