Dinosauria Owen 1841 [Padian & May 1993], nom. cl. inval. see Clade Dinosauria Owen 1842 [Langer, Novas, Bittencourt, Ezcurra & Gauthier 2020]
   †Prosauropoda Huene 1920 [Sereno 1998] see Suborder Prosauropoda Huene, 1920
     †Sauropoda Marsh 1878 [Salgado et al. 1997]
       †Eusauropoda Upchurch 1995
         †Neosauropoda Bonaparte 1986 [Wilson & Sereno 1998]
           †Diplodocoidea Upchurch 1995 [Wilson & Sereno 1998] see Superfamily Diplodocoidea Marsh, 1884
             1.1 Genus †Amazonsaurus Carvalho, Avilla & Salgado, 2003
             1.2.1 Genus †Zapalasaurus Salgado, Carvalho & Garrido, 2006
             1.2.2 Genus †Histriasaurus Dalla Vecchia, 1998
             1.2.3.1 Genus †Comahuesaurus Carballido, Salgado, Pol, Canudo & Garrido, 2012
             1.2.3.2.1.1 Genus †Demandasaurus Fernández-Baldor, Canudo, Huerta, Montero, Pereda-Suberbiola & Salgado, 2010
             1.2.3.2.1.2 Genus †Nigersaurus Sereno, Beck, Dutheil, Larsson, Lyon, Moussa, Sadleir, Sidor, Varricchio, Wilson & Wilson, 1999
             1.2.3.2.2.1 Genus †Rayososaurus Bonaparte, 1995
             1.2.3.2.2.2.1 Genus †Rebbachisaurus Lavocat, 1954
             1.2.3.2.2.2.2.1 Genus †Cathartesaura Gallina & Apesteguía, 2005
             1.2.3.2.2.2.2.2 Genus †Limaysaurus Salgado, Garrido, Cocca & Cocca, 2004
             2.1.1 Genus †Suuwassea Harris & Dodson, 2004
             2.1.2.1 Genus †Amargasaurus Salgado & Bonaparte, 1991
             2.1.2.2.1 Genus †Dicraeosaurus Janensch, 1914
             2.1.2.2.2 Genus †Brachytrachelopan Rauhut, Remes, Fechner, Cladera & Puerta, 2005
             2.2.1 Genus †Apatosaurus Marsh, 1877
             2.2.2.1 Genus †Diplodocus Marsh, 1878
             2.2.2.2 Genus †Barosaurus Marsh, 1890