Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Reptilia Linnaeus, 1758 - reptiles
               Subclass Lepidosauria Duméril & Bibron, 1839
                 Order Squamata Oppel, 1811
                   Suborder Sauria McCartney, 1802 - lizards see Clade Sauria Macartney 1802 [Gauthier & de Queiroz 2020]
                     Infraorder Varanomorpha
                       1 Family †Aigialosauridae Kramberger, 1892 - aigialosaurs
                       2 Family †Dolichosauridae Gervais, 1852 - dolichosaurs
                       3 Family †Mosasauridae Gervais, 1853 - mosasaurs
                       4 Family Helodermatidae Gray, 1837 - Gila monsters
                       5 Family Varanidae Gray, 1827 - monitor lizards
                       6 Family Lanthanotidae Steindachner, 1877 - earless monitors