Phylum [Vertebrata] Lamarck, 1801 see Infraphylum Vertebrata Lamarck, 1801
   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.
           Order †Thecodontia Owen, 1859 see Division Archosauria Cope, 1869
             1 Suborder †Proterosuchia Broom, 1906 see Order Proterosuchia Broom, 1906
             2 Suborder †Rauisuchia Bonaparte, 1982 - rauisuchians
             3 Suborder †Phytosauria Meyer, 1861 see Order Phytosauria Meyer, 1861
             4 Suborder †Aetosauria Nicholson & Lydekker, 1889 see Order Aetosauria Nicholson & Lydekker, 1889
             5 Suborder †Ornithosuchia (Huene, 1908) see Order Ornithosuchia Bonaparte, 1971
             6 Genus †Longisquama Sharov, 1970