Dinosaur size
There were larger dinosaurs, but knowledge of them is based entirely on a small number of fragmentary fossils. Most of the largest herbivorous specimens on record were discovered in the 1970s or later, and include the massive titanosaur "Argentinosaurus huinculensis", which is the largest dinosaur known from uncontroversial evidence, estimated to have been and long. Some of the longest sauropods were those with exceptionally long, whip-like tails, such as the "Diplodocus hallorum" (formerly "Seismosaurus") and the 33- to 35-metre-long (108–115 ft) "Supersaurus". The tallest was the "Brachiosaurus".
Puertasaurus
"Puertasaurus" was a very large animal. Its size is difficult to estimate due of the scarcity of its remains, but modern estimates place it around long and in mass. The largest of the four preserved bones is the dorsal vertebra, which at wide is the broadest known vertebra of any sauropod. The Cerro Fortaleza Formation is of uncertain age, due to the inconsistency of stratigraphic nomenclature in Patagonia. When "Puertasaurus" was alive, the Cerro Fortaleza Formation would have been a humid, forested landscape. "Puertasaurus" would have shared its habitat with other dinosaurs, including another large sauropod, "Dreadnoughtus", in addition to other reptiles and fish.