†[Eusauropoda] Upchurch 1995
   †Neosauropoda Bonaparte 1986 [Wilson & Sereno 1998]
     †Macronaria Wilson & Sereno 1998
       †Titanosauriformes Salgado, Coria & Calvo 1997
         †Somphospondyli Wilson & Sereno 1998
           Genus †Sonidosaurus Xu X., Zhang X. H., Tan Q., Zhao X. & Tan L., 2006, incertae sedis [monotypic]
             1 †Sonidosaurus saihangaobiensis Xu et al., 2006