Phylum Chordata Bateson, 1885 - chordates
   Subphylum Vertebrata Cuvier, 1812 - vertebrates
     Class Reptilia Linnaeus, 1758 - reptiles
       Subclass Diapsida Osborn, 1903 - diapsids see Clade Diapsida Osborn 1903 [Gauthier & de Queiroz 2020]
         Infraclass Archosauromorpha Huene, 1946 see Clade Archosauromorpha Huene 1946 [Benton 1985], nom. cl. inval.
           Superorder Archosauria Cope, 1869 - archosaurs see Clade Archosauria Cope 1869 [Gauthier & Padian 1985], nom. cl. inval.
             1 Order Crocodylia Wagler, 1830 - crocodiles
             2 Order †Thecodontia Owen, 1859 see Division Archosauria Cope, 1869
             3 Order †Pterosauria Kaup, 1834 - pterosaurs
             4.0 Order †Dinosauria Owen, 1841 - dinosaurs see Clade Dinosauria Owen 1842 [Langer, Novas, Bittencourt, Ezcurra & Gauthier 2020]
             4.1 Order †Herrerasauria Galton, 1985
             4.2.1 Order †Saurischia Seeley, 1887 see Clade Saurischia Seeley 1888 [Gauthier, Langer, Novas, Bittencourt & Ezcurra 2020]
             4.2.2 Order †Ornithischia Seeley, 1887