Genus: Puertasaurus NOVAS, SALGADO, CALVO & AGNOLIN, 2005
Etymology: In honor of Pablo Puerta, remarkable fossil-hunter who helped discovered and prepared the specimen, and Greek, sauros, "lizard."

Species: reuili NOVAS, SALGADO, CALVO & AGNOLIN, 2005
Etymology: In honor of Santiago Reuil, remarkable fossil-hunter who helped discovered and prepared the specimen.

Holotype: MPM 10002

Locality: Cerro Los Hornos, La Leona, Santa Cruz Province, Argentina.

Horizon: Pari Aike Formation.

Biostratigraphy:

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

Material: Most of a cervical vertebra, a complete dorsal 2, and centra of 2 caudal vertebrae.