Vertebrata Cuvier, 1812 - vertebrates
Gnathostomata
Teleostomi
Tetrapoda Goodrich, 1930
Amniota Haeckel, 1866 - amniotes
Class Reptilia Linnaeus, 1758 [paraphyletic] - reptiles
Subclass Diapsida Osborn, 1903 - diapsids
see Clade Diapsida Osborn 1903 [Laurin 1991]
Order †Placodontia Owen, 1859, incertae sedis
1 ?Family †Helveticosauridae Peyer, 1955
2 Family †Placodontidae Cope, 1871
3 Family †Cyamodontidae Nopcsa, 1923
4 Family †Henodontidae Huene, 1936