Vertebrata Cuvier, 1812 - vertebrates
Status: extant
   Gnathostomata
  Status: extant
     Teleostomi
    Status: extant
       Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
      Status: extant
         Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988] - amniotes
        Status: extant
           Class Reptilia Linnaeus, 1758 [paraphyletic] - reptiles
          Status: extant
             Subclass Diapsida Osborn, 1903 - diapsids see Clade Diapsida Osborn 1903 [Gauthier & de Queiroz 2020]
            Status: extant
               Infraclass Archosauromorpha Huene, 1946 see Clade Archosauromorpha Huene 1946 [Benton 1985], nom. cl. inval.
              Status: extant
                 Superorder Archosauria Cope, 1869 - archosaurs see Clade Archosauria Cope 1869 [Gauthier & Padian 1985], nom. cl. inval.
                Status: extant
                   †Dinosauria Owen 1841 [Padian & May 1993], nom. cl. inval. see Clade Dinosauria Owen 1842 [Langer, Novas, Bittencourt, Ezcurra & Gauthier 2020]
                  Status: fossil
                     Order †Saurischia Seeley, 1887 see Clade Saurischia Seeley 1888 [Gauthier, Langer, Novas, Bittencourt & Ezcurra 2020]
                    Status: fossil
                       Suborder †Theropoda Marsh, 1881 see Clade Theropoda Marsh 1881 [Naish, Cau, Holtz Jr., Fabbri & Gauthier 2020]
                      Status: fossil
                         Family †Megalosauridae Fitzinger, 1843
                        Status: fossil