Genus: Argentinosaurus BONAPARTE & CORIA, 1993
Etymology: In reference to Argentina, the country where the specimen was found, and Greek, sauros, "lizard": “Argentina lizard”.

Species: huinculensis BONAPARTE & CORIA, 1993
Etymology: In reference to the Huincul Member of the Rio Limay Formation.

Holotype: Paleontologia de Vertebrados en el Museo Municipal “Carmen Funes” de Plaza Huincul, Province of Neuquen, con la sigal PVPH-1.

Locality: La Buitrera, 50 km from Cipolletti (38.56 S; 67.59 W), Plaza Huincul, Neuquen Province, Patagonia, Argentina.

Horizon: Huincul Formation, Middle Rio Limay Subgroup, Lower Neuquen Group.
(Was Huincul Member, Rio Limay Formation).


Age: Limayan Tetrapoda Assemblage, Cenomanian Stage, Uppermiddle Gallic Subepoch, Lowermost Gulf Epoch, Late Early or Middle Cretaceous-Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Early Late Cretaceous.

Material: Dorsal neural spine, 4 nearly complete dorsal vertebrae, rib fragments, fragmentary sacrum, and right tibia.
Note: 2 of the dorsal vertebrae are fused to each other (R. Coria pers. comm.).