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 Genus Holbrookia Girard, 1851