Squamata Oppel 1811 [Gauthier, Estes & de Queiroz 1988], nom. cl. inval. see Order Squamata Oppel, 1811
   Episquamata Vidal & Hedges, 2005
     Toxicofera Vidal & Hedges, 2005
       Iguania Latreille 1825 [Estes et al. 1988] see Suborder Iguania Cope, 1864
         Family Crotaphytidae Smith & Brodie, 1982
           1 Genus Crotaphytus Holbrook, 1842
           2 Genus Gambelia Baird, 1858