†[Eusauropoda] Upchurch 1995
   †Neosauropoda Bonaparte 1986 [Wilson & Sereno 1998]
     †Macronaria Wilson & Sereno 1998
       †Titanosauriformes Salgado, Coria & Calvo 1997
         †Somphospondyli Wilson & Sereno 1998
           [plesion] Genus †Sauroposeidon Wedel, Cifelli & Sanders, 2000
             1 †Sauroposeidon proteles Wedel, Cifelli & Sanders, 2000