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]
†Neosauropoda Bonaparte 1986 [Wilson & Sereno 1998]
†Diplodocoidea Upchurch 1995 [Wilson & Sereno 1998]
see Superfamily Diplodocoidea Marsh, 1884
†Rebbachisauridae Bonaparte 1997 [Wilson 2004]
see Family Rebbachisauridae Bonaparte, 1997
†Nigersaurinae Whitlock 2011
see Subfamily Nigersaurinae Whitlock, 2011
Genus †Nigersaurus Sereno, Beck, Dutheil, Larsson, Lyon, Moussa, Sadleir, Sidor, Varricchio, Wilson & Wilson, 1999
†Nigersaurus taqueti Sereno, Beck, Dutheil, Larsson, Lyon, Moussa, Sadleir, Sidor, Varricchio, Wilson & Wilson, 1999