Puertasaurus is a genus of titanosaurid sauropod that appeared during the Late Cretaceous. Its bones were recovered from the Pari Aike Formation, which is dated to be middle Cenomanian in age. It lived in what is now Patagonia. The type species, Puertasaurus reuili, is named in honor of Pablo Puerta and Santiago Reuil, who discovered the specimen in January 2001. Puertasaurus is based on a partial spinal column: a neck vertebra, a dorsal (back) vertebra, and two tail vertebrae.