Vertebrata Cuvier, 1812 - vertebrates
   Gnathostomata
     Teleostomi
       Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
         Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988] - amniotes
           Class Reptilia Linnaeus, 1758 [paraphyletic] - reptiles
             Subclass Diapsida Osborn, 1903 - diapsids see Clade Diapsida Osborn 1903 [Gauthier & de Queiroz 2020]
               Infraclass Lepidosauromorpha Benton, 1983 see Subclass Lepidosauromorpha Benton, 1983
                 Superorder Lepidosauria Haeckel, 1866 see Superorder Lepidosauriformes Gauthier, Estes & de Queiroz, 1988
                   Order Squamata Oppel, 1811
                     Suborder Lacertilia Owen, 1842
                       Infraorder Iguania Latreille, 1825 see Suborder Iguania Cope, 1864
                         1 Family †Euposauridae Camp, 1923
                         2 Family †Arretosauridae Gilmore, 1943
                         3 Family Iguanidae Oppel, 1811 - iguanas
                         4 Family Agamidae Spix, 1825 - agamas
                         5 Family Chameleontidae see Family Chamaeleonidae Rafinesque, 1815