Vertebrata Cuvier, 1812 - vertebrates
Gnathostomata
Teleostomi
Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988] - amniotes
Class Reptilia Linnaeus, 1758 [paraphyletic] - reptiles
Subclass Diapsida Osborn, 1903 - diapsids
see Clade Diapsida Osborn 1903 [Gauthier & de Queiroz 2020]
Infraclass Lepidosauromorpha Benton, 1983
see Subclass Lepidosauromorpha Benton, 1983
Superorder Lepidosauria Haeckel, 1866
see Superorder Lepidosauriformes Gauthier, Estes & de Queiroz, 1988
Order Squamata Oppel, 1811
Suborder Serpentes Linnaeus, 1758 - snakes
Infraorder Caenophidia Hoffstetter, 1939
see Superfamily Xenophidia
Superfamily Colubroidea Oppel, 1811
Family Russellopheidae Rage, 1978
see Family Russellophiidae Rage, 1975