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
         1.1 Family Chamaeleonidae Rafinesque, 1815 - chameleons
         1.2 Family Agamidae Spix, 1825 - agamas
         2.1 Family Tropiduridae Bell, 1843 - Neotropical ground lizards
         2.2.1 Family Iguanidae Oppel, 1811 - iguanas
         2.2.2.1 Family Leiocephalidae Frost & Etheridge, 1989 [monotypic]
         2.2.2.2.1.1 Family Crotaphytidae Smith & Brodie, 1982
         2.2.2.2.1.2 Family Phrynosomatidae Fitzinger, 1843
         2.2.2.2.2.1.1 Family Polychrotidae Fitzinger, 1843 [monotypic] - anoles
         2.2.2.2.2.1.2 Family Hoplocercidae Frost & Etheridge, 1989 - wood lizards
         2.2.2.2.2.2.1.1.1 Family Opluridae Moody, 1983
         2.2.2.2.2.2.1.1.2 Family Leiosauridae Frost, Etheridge, Janies & Titus, 2001
         2.2.2.2.2.2.1.2 Family Liolaemidae Frost & Etheridge, 1989
         2.2.2.2.2.2.2.1 Family Corytophanidae Fitzinger, 1843 - casque-headed lizards
         2.2.2.2.2.2.2.2 Family Dactyloidae Fitzinger, 1843 [monotypic]