Squamata Oppel 1811 [Gauthier, Estes & de Queiroz 1988], nom. cl. inval. see Order Squamata Oppel, 1811
   Episquamata Vidal & Hedges, 2005
     Toxicofera Vidal & Hedges, 2005
       Serpentes see Suborder Serpentes Linnaeus, 1758
         Family Boidae Gray, 1825 [paraphyletic?] - pythons and boas
           1 Subfamily Sanziniinae see Family Sanziniidae Romer, 1956
           2.2.1 Subfamily Ungaliophiinae McDowell, 1987
           2.2.2.1 Subfamily Candoiinae Pyron, Burbrink & Wiens, 2013 [monotypic] see Family Candoiidae Pyron, Reynolds & Burbrink, 2014
           2.2.2.2.1 Subfamily Erycinae Bonaparte, 1831 [monotypic] - sand boas see Family Erycidae Bonaparte, 1831
           2.2.2.2.2 Subfamily Boinae Gray, 1825 - boas see Family Boidae Gray, 1825