Giganotosaurusis thought to have been homeothermic (a type of “warm-bloodedness”), with a metabolism between that of a mammal and a reptile, which would have enabled fast growth. Part of the family Carcharodontosauridae, Giganotosaurus is one of the most completely known members of the group, which includes other very large theropods, such as the closely related Mapusaurus and Carcharodontosaurus. The neck was strong and the pectoral girdle proportionally small. The teeth were compressed sideways and had serrations. The front of the lower jaw was flattened, and had a downwards projecting process (or “chin”) at the tip. The skull was low, with rugose (rough and wrinkled) nasal bones and a ridge-like crest on the lacrimal bone in front of the eye. Some researchers have found the animal to be larger than Tyrannosaurus, which has historically been considered the largest theropod, while others have found them to be equal in size, and the largest size estimates for Giganotosaurus exaggerated.

The dentary bone that belonged to a supposedly larger individual has been used to extrapolate a length of 13.2 m (43 ft). Estimates for the most complete specimen range from a length of 12 to 13 m (39 to 43 ft), a skull 1.53 to 1.80 m (5.0 to 5.9 ft) in length, and a weight of 4.2 to 13.8 t (4.6 to 15.2 short tons). Giganotosaurus was one of the largest known terrestrial carnivores, but the exact size has been hard to determine due to the incompleteness of the remains found so far. The genus attracted much interest and became part of a scientific debate about the maximum sizes of theropod dinosaurs. A dentary bone, a tooth and some tracks, discovered before the holotype, were later assigned to this animal. carolinii in 1995 the genus name translates as “giant southern lizard” and the specific name honours the discoverer, Rubén D. The holotype specimen was discovered in the Candeleros Formation of Patagonia in 1993, and is almost 70% complete. Giganotosaurus is a genus of theropod dinosaur that lived in what is now Argentina, during the early Cenomanian age of the Late Cretaceous period, approximately 99.6 to 97 million years ago.

Jurassic world evolution giganotosaurus