Giganotosaurus is the largest carnivorous dinosaur from South America. At an estimated 41 ft long, this massive dinosaur challenges even Tyrannosaurus rex for the title of largest theropod ever. Giganotosaurus occupied South America during the Late Cretaceous, 97 million years ago,

This predator is gigantic by name and gigantic by nature. It was first reported by Rodolfo A. Coria and Leonardo Salgado in 1995 as the largest predatory dinosaur of all time, a claim was based on a partial skeleton including bones from the skull, shoulder, hips, and legs, plus most of the spine. The remains were excavated from the Río Limay Formation of Neuquén Province, Argentina, so while it is without a doubt the largest theropod dinosaur from South America, since no complete skeleton of Giganotosaurus is known, its exact length is an estimate.