Serpentes see Suborder Serpentes Linnaeus, 1758
   Alethinophidia Nopcsa, 1923 see Infraorder Alethinophidia Nopcsa, 1923
     Afrophidia Vidal, Delmas & Hedges, 2007
       1.1 Family Bolyeriidae Hoffstetter, 1946
       1.2.1 Family Uropeltidae Müller, 1831 - shield-tail snakes
       1.2.2.1 Family Boidae Gray, 1825 - pythons and boas
       1.2.2.2.1 Family Xenopeltidae Bonaparte, 1845 [monotypic] - sunbeam snakes
       1.2.2.2.2.1 Family Loxocemidae Cope, 1861 [monotypic]
       1.2.2.2.2.2 Family Pythonidae Fitzinger, 1826
       2.1 Family Acrochordidae Bonaparte, 1831 [monotypic] - wart snakes
       2.2.1 Family Xenodermatidae Gray, 1849 see Family Xenodermidae Gray, 1849
       2.2.2.1 Family Pareatidae Hoffmann, 1890
       2.2.2.2.1 Family Viperidae Oppel, 1811 - vipers and pit vipers
       2.2.2.2.2.1 Family Homalopsidae Jan, 1863
       2.2.2.2.2.2.1.1 Family Lamprophiidae Fitzinger, 1843 [paraphyletic]
       2.2.2.2.2.2.1.2 Family Elapidae Boie, 1827
       2.2.2.2.2.2.2.1 Family Natricidae Boettger, 1883 see Subfamily Natricinae Bonaparte, 1838
       2.2.2.2.2.2.2.2.1 Family Colubridae Oppel, 1811 - colubrids
       2.2.2.2.2.2.2.2.2.1 Family Pseudoxenodontidae McDowell, 1987 see Subfamily Pseudoxenodontinae
       2.2.2.2.2.2.2.2.2.2 Family Dipsadidae Bonaparte, 1838 see Subfamily Dipsadinae Guenther, 1858