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 Phrynosomatidae Fitzinger, 1843
           1 Genus Callisaurus Blainville, 1835
           2 Genus Cophosaurus Troschel, 1850
           3 Genus Holbrookia Girard, 1851
           4 Genus Petrosaurus Boulenger, 1885
           5 Genus Phrynosoma Wiegmann, 1828
           6 Genus Sceloporus Wiegmann, 1828
           7 Genus Uma Baird, 1858
           8 Genus Urosaurus Hallowell, 1854
           9 Genus Uta Baird & Girard, 1852