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
                       1 Infraorder †Eolacertilia Robinson, 1967
                       2 Infraorder Iguania Latreille, 1825 see Suborder Iguania Cope, 1864
                       3 Infraorder Nyctisauria see Suborder Gekkota Camp, 1923
                       4 Infraorder Leptoglossa see Infraorder Scincomorpha Camp, 1923
                       5 Infraorder Annulata see Suborder Amphisbaenia Gray, 1844
                       6 Infraorder Diploglossa Cope, 1864 see Suborder Anguimorpha Fürbringer, 1900