†Sauropoda Marsh 1878 [Salgado et al. 1997]
Count: -
   †Neosauropoda Bonaparte 1986 [Wilson & Sereno 1998]
  Count: -
     †Macronaria Wilson & Sereno 1998
    Count: -
       †Titanosauriformes Salgado, Coria & Calvo 1997
      Count: -
         †Somphospondyli Wilson & Sereno 1998
        Count: -
           †Titanosauria Bonaparte & Coria 1993
          Count: -
             †Lithostrotia Upchurch, Barrett & Dodson 2004
            Count: -
               †Lognkosauria Calvo et al. 2007
              Count: [†*] †8g;8s
                 Genus †Quetecsaurus González-Riga & David, 2014 [monotypic]
                Count: [†*] †1s [26 Jan 2019]
                   1 †Quetecsaurus rusconii González Riga & Ortiz David, 2014
                  Count: -