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
               Scolecophidia Duméril & Bibron, 1844 see Infraorder Scolecophidia Duméril & Bibron, 1844
                 1 Family Typhlopidae Merrem, 1820 - blind snakes
                 2 Family Leptotyphlopidae Stejneger, 1891 - slender blind snakes
                 3 Family Anomalepididae Taylor, 1939