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".
Alamosaurus
"Alamosaurus" was a gigantic quadrupedal herbivore with a long neck and tail and relatively long limbs. Its body was at least partly covered in bony armor.The total length of "Alamosaurus" is estimated to be long. Though most of the complete remains come from juvenile or small adult specimens, three fragmentary specimens, SMP VP−1625, SMP VP−1850 and SMP VP−2104, suggest that adult "Alamosaurus" could have grown to enormous sizes comparable to the largest known dinosaurs like "Argentinosaurus", which has been estimated to weigh . Scott Hartman estimates "Alamosaurus" being slightly shorter at and is equal in weight to other massive titanosaurs such as "Argentinosaurus" and "Puertasaurus". However, he says that at the moment, scientists do not know whether the massive tibia belongs to an "Alamosaurus" or a completely new species of sauropod.
Though no skull has ever been found, rod-shaped teeth have been found with "Alamosaurus" skeletons and probably belonged to this dinosaur. The vertebrae from the middle part of its tail had elongated centra. "Alamosaurus" had vertebral lateral fossae that resembled shallow depressions. Fossae that similarly resemble shallow depressions are known from "Saltasaurus", "Malawisaurus", "Aeolosaurus", and "Gondwanatitan". "Venenosaurus" also had depression-like fossae, but its "depressions" penetrated deeper into the vertebrae, were divided into two chambers, and extend farther into the vertebral columns. "Alamosaurus" had more robust radii than "Venenosaurus".