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
               1 Subclass Anapsida Osborn, 1903 - anapsids
               2 Subclass †Synapsida Osborn, 1903 - synapsids see Class Synapsida Osborn, 1903
               3 Subclass †Ichthyopterygia Blainville, 1835 [monotypic] - ichthyopterygians see Infraclass Ichthyosauria sedis mutabilis
               4 Subclass †Araeoscelida [monotypic] see Order Araeoscelidia Williston, 1913
               5 Order †Trilophosauria Romer, 1956
               6 Order †Weigeltisauria Kuhn, 1939 [monotypic]
               7 Subclass †Euryapsida Colbert, 1945 see Subclass Diapsida Osborn, 1903
               8 Subclass Archosauria Cope, 1869 see Division Archosauria Cope, 1869
               9 Subclass Lepidosauria Duméril & Bibron, 1839 see Superorder Lepidosauria Haeckel, 1866