Puertasaurus reuili, a massive titanosaurid dinosaur, roamed the forests of Patagonia during the Late Cretaceous. Known for its colossal size, it featured an elongated neck for browsing treetops and a long tail for balance. This herbivore played a crucial role in its ecosystem by shaping vegetation patterns.

Puertasaurus reuili is a genus of sauropod dinosaur that lived during the Late Cretaceous period. Its fossils have been discovered in the Cerro Fortaleza Formation in Santa Cruz Province, Patagonia, Argentina.

During the Late Cretaceous period, the area now known as Patagonia was characterized by a semi-arid climate with seasonal rainfall. The region likely had open plains, river valleys, and a variety of vegetation, including coniferous trees and ferns.

Puertasaurus reuili, as a large sauropod, would have occupied a niche as a herbivore, feeding on high vegetation such as conifers and ferns. Its size suggests it was likely one of the top herbivores in its ecosystem, possibly forming herds for protection against predators.