I am currently working on coding any and all titanosaurs into the matrix of Gonzalez et al (2016), describing Notocolossus. Just as a preliminary test, I have added a few new taxa, including Argyrosaurus, Hypselosaurus, Quetecsaurus and Puertasaurus. The results is shown below, although narrowed down to only show Titanosaurs.
T – Titanosauria A – Argyrosauridae L – Lognkosauria P – Puertasaurinae M – Lithostrotia S – Saltasauridae O – Opisthocoelicaudiinae
The main things of interest if that Argyrosauridae is resolved, and places sister to Lognkosauria, and Hypselosaurus placed as a Saltasaurid, in a polytomy with Saltasaurus, Alamosaurus, Trigonosaurus, Nemegtosaurus, Opisthocoelicaudiinae, and what would normally be Nemegtosauridae, but currently excludes the name genus.
González Riga, Bernardo J.; Lamanna, Matthew C.; Ortiz David, Leonardo D.; Calvo, Jorge O.; Coria, Juan P. (2016). “A gigantic new dinosaur from Argentina and the evolution of the sauropod hind foot”. Scientific Reports 6: 19165. doi:10.1038/srep19165. ISSN 2045-2322.