Giganotosaurus was a giant theropod dinosaur that lived in what is now South America during the early Cretaceous period, between approximately 98 and 97 million years ago. The genus contains a single known species, Giganotosaurus carolinii, which is one of the largest land-based predators ever discovered. Giganotosaurus is known for a small number of fossil remains, including several partial skeletons.