Saurischia Seeley 1887 [Gauthier 1986], nom. cl. inval. see Clade Saurischia Seeley 1888 [Gauthier, Langer, Novas, Bittencourt & Ezcurra 2020]
   †Sauropoda Marsh 1878 [Salgado et al. 1997]
     †Diplodocoidea Upchurch 1995 [Wilson & Sereno 1998] see Superfamily Diplodocoidea Marsh, 1884
       †Diplodocimorpha Calvo & Salgado, 1995
         †Rebbachisauridae Bonaparte 1997 [Wilson 2004] see Family Rebbachisauridae Bonaparte, 1997
           †Khebbashia Fanti et al., 2015
             †Rebbachisaurinae Wilson & Allain, 2015 see Subfamily Rebbachisaurinae Wilson & Allain, 2015
               1 Genus †Katepensaurus Ibiricu, Casal, Martínez, Lamanna, Luna & Salgado, 2013
               2.1 Genus †Tataouinea Fanti, Cau, Hassine & Contessi, 2013
               2.2 Genus †Demandasaurus Fernández-Baldor, Canudo, Huerta, Montero, Pereda-Suberbiola & Salgado, 2010
               2.3 Genus †Nigersaurus Sereno, Beck, Dutheil, Larsson, Lyon, Moussa, Sadleir, Sidor, Varricchio, Wilson & Wilson, 1999
               2.4 Genus †Rebbachisaurus Lavocat, 1954