Subclass Anapsida Williston 1917 (anapsid)
Alternative spelling: Anaspida
Parent taxon: Reptilia according to J. Peng et al. 2001
Sister taxa: Amblyglossae, Coeluria, Cunichnoides, Enaliosauria, Eupalamopus, Eureptilia, Ganocephala, Glauconia, Gymnarthria, Ichthyopterygia, Ischyrotherium, Isocampe, Kintneria, Macelognatha, Omosauria, Oolithes, Ornithocephala, Parareptilia, Placodontomorpha, Plectropterna, Proganosauromorpha, Pythonomorpha, Rhamphosauria, Rhizodonta, Sauranodonta, Streptosauria, Testudinata, Theromorpha, Tocosauria, Triaenopus
Subtaxa: Captorhinida
Ecology: