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
                   Boas Gray, 1825 - pythons and boas
                     1 Genus Calabaria Gray, 1858
                     2 Malagasy Boinae Gray, 1825 - boas see Family Boidae Gray, 1825
                     3.1 "Boinae" Gray, 1825 - boas see Family Boidae Gray, 1825
                     3.2 Old World erycinae Bonaparte, 1831 - sand boas see Family Erycidae Bonaparte, 1831
                     3.3.1 New World erycinae Bonaparte, 1831 - sand boas see Family Erycidae Bonaparte, 1831
                     3.3.2 Subfamily Ungaliophiinae McDowell, 1987