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
†Flagellicaudata Harris & Dodson 2004
†Dicraeosauridae Huene 1956 [Sereno 1998]
see Family Dicraeosauridae Janensch, 1929
Genus †Brachytrachelopan Rauhut, Remes, Fechner, Cladera & Puerta, 2005
†Brachytrachelopan mesai Rauhut, Remes, Fechner, Cladera & Puerta, 2005