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".
Antarctosaurus
Antarctosaurus (; meaning "southern lizard") is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous Period of what is now South America. The type species, "Antarctosaurus wichmannianus", was described by prolific German paleontologist Friedrich von Huene in 1929, who also described a second species in 1929. Three additional species of "Antarctosaurus" have been named since then but later studies have indicated that none of these pertain to "Antarctosaurus. Antarctosaurus giganteus," the second species, is also considered dubious but it's remains represent one of the largest dinosaurs known.