†Sauropoda Marsh 1878 [Salgado et al. 1997] †Neosauropoda Bonaparte 1986 [Wilson & Sereno 1998] †Macronaria Wilson & Sereno 1998 †Titanosauriformes Salgado, Coria & Calvo 1997 †Somphospondyli Wilson & Sereno 1998 †Titanosauria Bonaparte & Coria 1993 †Lithostrotia Upchurch, Barrett & Dodson 2004 †Lognkosauria Calvo et al. 2007 Genus †Argentinosaurus Bonaparte & Coria, 1993 [monotypic] †Argentinosaurus huinculensis Bonaparte & Coria, 1993