Temporal range: Upper Cretaceous
|Gorgosaurus skeletal mount|
Fossil remains have been found in the Canadian province of Alberta and possibly the U.S. state of Montana. It was closely related to T. rex and Albertosaurus. Gorgosaurus, like T. rex, had huge jaws with large, sharp, cone-shaped teeth, powerful legs, tiny arms and two-fingered hands.
Gorgosaurus spent as much as half its life in the juvenile phase before ballooning up to near-maximum size in only a few years.
Most specimens of Gorgosaurus libratus have been recovered from the Dinosaur Park Formation in Alberta. This formation was laid down in the later Cretaceous, between 76.5 and 74.8 million years ago.
References[change | change source]
- Erickson, Gregory M. et al 2004. Gigantism and comparative life-history parameters of tyrannosaurid dinosaurs. Nature. 430 (7001): 772–775. 
- Eberth D.A. (2005). "The geology." In: Currie P.J. and Koppelhus E.B. (eds) Dinosaur Provincial Park: a spectacular ancient ecosystem revealed. Indiana University Press: Bloomington and Indianapolis, p54–82.