Giganotosaurus (pronounced /ˌdʒaɪɡəˌnoʊtəˈsɔrəs/ JYE-gə-NOH-tə-SOR-əs) is a genus of carcharodontosaurid dinosaur that lived around 97 million years ago during the later stage of the Cretaceous Period. It is one of the largest known terrestrial carnivores; possibly larger than even Tyrannosaurus, growing to be 14 meters (46 feet) long, 4 meters (13 feet) tall, and 8 tons in weight. It lived in what is now the South American country of Argentina. Their fossils are found in Neuquen.
At least one Giganotosaurus was captured by the Noah's Ark Plan members and taken into the far future. For some time its existence was considered merely a rumour amongst the soldiers in the military facility; a dinosaur that's larger than a Tyrannosaurus - so big, in fact, that men could accidentally walk into its mouth, like a trap. The reason why it remained a rumour wasn't because its existence was doubtful, but because the fact that no one who went out looking for it ever returned.
The Giganotosaurus' presence in the future was confirmed at the Missile Silo, where it attacked the one-eyed Tyrannosaurus that had been stalking Regina and Dylan Morton for some time. The two beasts fought with all they had, but in the end the Giganotosaurus was triumphant, but only after a bad injury from the Tyrannosaurus' bite on its leg.
The dinosaur then proceeded to hunt for Regina, leaving its kill behind as it broke through the Missile Silo walls. Repelled and eventually knocked unconscious by flames and their accompanied fumes, the Giganotosaurus later awoke to find Regina next to the missile. Breaking the metallic structure in order to reach her, the missile collapsed onto the ground and exploded.
Somehow surviving the explosion unharmed, the Giganotosaurus moved down-river into the Noah's Ark Plan's timegate complex it came from, where it challenged Dylan in a final battle. It was finally killed when a satellite in communication with the complex fired a powerful beam directly onto the creature, its remains surrounded a deep hole.