Total number of species = 648 Nota bene: In the following list, a binomial authority in parentheses indicates that the species was originally described in a genus other than the genus to which it is currently assigned.

Testudines

Cheloniidae (4 species)

Dermochelyidae (1 species)

Emydidae (2 species)

Geoemydidae (1 species)

Kinosternidae (1 species)

Testudinidae (2 species)

Podocnemididae (5 species)

Chelidae (18 species)

Nomenclature based on Rhodin et al., 2010

Crocodilia

Alligatoridae (6 species)

Squamata

Amphisbaenidae (50 species)

Rhineuridae (7 species)

Iguanidae (1 species)

Hoplocercidae (3 species)

Polychrotidae (21 species)

Leiosauridae (7 species)

Tropiduridae (35 species)

Gekkonidae (29 species)

Anguidae (5 species)

Teiidae (31 species)

Gymnophthalmidae (71 species)

Scincidae (14 species)

Squamata - Serpentes

Anomalepididae (4 species)

Leptotyphlopidae (12 species)

Typhlopidae (6 species)

Aniliidae (1 species)

Tropidophiidae (1 species)

Boidae (8 species)

Colubridae (237 species)

Elapidae (34 species)

Viperidae (31 species)