Genus: Clasmodosaurus AMEGHINO, 1898 (nomen dubium)
Etymology: Greek, klasma, "fragment," Greek, odon, "tooth" and Greek, sauros, "lizard": “Fragment-toothed lizard”.
= Clasmadosaurus ROZHDESTVENKSY & TATARINOV, 1964 (sic)
= Clasmodon von HUENE, 1929 (sic)
= Clasmosaurus ROMER, 1966 (sic)

Species: spatula AMEGHINO, 1898
Etymology: Latin, spatula, "broad piece, spatula."
= Clasmodon spatula (AMEGHINO, 1898) (sic)

Holotype: MLP, personal collection of Ameghino, without number.

Locality: Rio Sehuen, Santa Cruz Province, Argentina.

Horizon: Bajo Barreal Formation.

Biostratigraphy:

Age: Campanian-Maastrichtian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: 3 incomplete teeth.

Note: Titanosauridae incertae sedis BONAPARTE, 1996