Infraphylum Tetrapoda Goodrich, 1930 see Clade Tetrapoda Hatschek & Cori 1896 [Laurin 2020]
   Superclass Amniota Haeckel, 1866 see Clade Amniota Haeckel 1866 [Laurin & Reisz 2020]
     Paraclass Reptilia Linnaeus, 1758 [paraphyletic] - reptiles
       Parasubclass Diapsida Osborn, 1903 [paraphyletic] - diapsids see Clade Diapsida Osborn 1903 [Gauthier & de Queiroz 2020]
         Parainfraclass Archosauria Cope, 1869 [paraphyletic] see Clade Archosauria Cope 1869 [Gauthier & Padian 2020]
           Superorder †Sauropodomorpha Huene, 1932 see Order Sauropodomorpha Huene, 1932
             Order †Brontosauria Olshevsky, 1991
               Suborder †Sauropoda Marsh, 1878 see Clade Sauropoda Marsh 1878 [Salgado et al. 1997]
                 Family †Diplodocidae Marsh, 1884
                   01 Genus †Amphicoelias Cope, 1877, incertae sedis
                   02 Genus †Apatosaurus Marsh, 1877
                   03 Genus †Atlantosaurus Marsh, 1877, nom. dub.
                   04 Genus †Barosaurus Marsh, 1890
                   05 Genus †Cetiosauriscus Huene, 1928
                   06 Genus †Diplodocus Marsh, 1878
                   07 Genus †Dystrophaeus Cope, 1877
                   08 Genus †Megacervixosaurus Zhao, 1983, nom. nud.
                   09 Genus †Mongolosaurus Gilmore, 1933
                   10 Genus †"Seismosaurus" Gillette, 1986, nom. ined. see Genus Seismosaurus Gillette, 1991
                   11 Genus †Supersaurus Jensen, 1985
                   12 Genus †Tornieria Sternfeld, 1911