Lepidosauria Haeckel 1866 [Gauthier, Estes & de Queiroz 1988], nom. cl. inval. see Class Lepidosauria Haeckel, 1866
   Order Squamata Oppel, 1811
     Bifurcata Vidal & Hedges, 2005
       Unidentata Vidal & Hedges, 2005
         Episquamata Vidal & Hedges, 2005
           Toxicofera Vidal & Hedges, 2005
             Serpentes see Suborder Serpentes Linnaeus, 1758
               Alethinophidia Nopcsa, 1923 see Infraorder Alethinophidia Nopcsa, 1923
                 Afrophidia Vidal, Delmas & Hedges, 2007
                   1 Caenophidia Hoffstetter, 1939
                   2 Family Bolyeriidae Hoffstetter, 1946
                   3 Family Xenophidiidae Wallach & Günther, 1998 [monotypic]
                   4 Asian Anilioidea Stejneger, 1907
                   5.1 Family Xenopeltidae Bonaparte, 1845 - sunbeam snakes
                   5.2.1 Family Loxocemidae Cope, 1861
                   5.2.2 Family Pythonidae Fitzinger, 1826
                   6 Boas Gray, 1825 - pythons and boas