†[Eusauropoda] Upchurch 1995
   †Neosauropoda Bonaparte 1986 [Wilson & Sereno 1998]
     †Macronaria Wilson & Sereno 1998
       †Titanosauriformes Salgado, Coria & Calvo 1997
         †Somphospondyli Wilson & Sereno 1998
           Genus †Mongolosaurus Gilmore, 1933, incertae sedis [monotypic]
             1 †Mongolosaurus haplodon Gilmore, 1933