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 Xenotyphlopidae Vidal, Vences, Branch & Hedges, 2010 [monotypic]
           1 Genus Xenotyphlops Wallach & Ineich, 1996