†[Eusauropoda] Upchurch 1995
   †Neosauropoda Bonaparte 1986 [Wilson & Sereno 1998]
     †Macronaria Wilson & Sereno 1998
       †Titanosauriformes Salgado, Coria & Calvo 1997
         †Somphospondyli Wilson & Sereno 1998
           1 Genus †Dongbeititan Wang X. R., You, Meng, Gao C., Cheng X. & Liu J. Y., 2007, incertae sedis [monotypic]
           2 Genus †Huanghetitan You, Li D. Q., Zhou L. & Ji Q., 2006, incertae sedis [monotypic]
           3 Genus †Pukyongosaurus Dong, Paik & Kim, 2001, nom. dub., incertae sedis [monotypic]
           4 Genus †Ruyangosaurus Lü, Xu L., Jia S., Zhang X. L., Zhang J. M., Yang L., You & Ji Q., 2009, incertae sedis [monotypic]
           5 [plesion] Genus †Ligabuesaurus Bonaparte, González-Riga & Apesteguía, 2006
           6.1 Genus †Gobititan You, Tang F. & Luo, 2003, incertae sedis [monotypic]
           6.2 [plesion] Genus †Sauroposeidon Wedel, Cifelli & Sanders, 2000
           6.3.1 Genus †Argentinosaurus Bonaparte & Coria, 1993, incertae sedis [monotypic]
           6.3.2 [plesion] Genus †Tastavinsaurus Canudo, Royo-Torres & Cuenca-Bescós, 2008
           6.3.3.1 †'Huanghetitan' ruyangensis Lü et al., 2007, nom. dub., incertae sedis
           6.3.3.2 Genus †Mongolosaurus Gilmore, 1933, incertae sedis [monotypic]
           6.3.3.3 Genus †Sonidosaurus Xu X., Zhang X. H., Tan Q., Zhao X. & Tan L., 2006, incertae sedis [monotypic]
           6.3.3.4 †Euhelopodidae Romer 1956 [D'Emic 2012] see Family Euhelopodidae Romer, 1956
           6.3.3.5.1 [plesion] Genus †Chubutisaurus del Corro, 1975
           6.3.3.5.2 †Titanosauria Bonaparte & Coria 1993