†[Eusauropoda] Upchurch 1995
Count: [†*] †56g;54s
   †Neosauropoda Bonaparte 1986 [Wilson & Sereno 1998]
  Count: [†*] †52g;51s
     †Macronaria Wilson & Sereno 1998
    Count: [†*] †52g;51s
       †Titanosauriformes Salgado, Coria & Calvo 1997
      Count: [†*] †46g;46s
         †Somphospondyli Wilson & Sereno 1998
        Count: [†*] †33g;32s
           Genus †Sonidosaurus Xu X., Zhang X. H., Tan Q., Zhao X. & Tan L., 2006, incertae sedis [monotypic]
          Count: [†*] †1s
             †Sonidosaurus saihangaobiensis Xu et al., 2006
            Count: -