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Temporal range: Late Cretaceous
Gorgosaurus libratus as it appeared in Walking with Dinosaurs: The 3D Movie
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Superorder: Theropoda
Genus: Tyrannosaurus
Lambe, 1914
Species: G. libratus
Binomial name
Gorgosaurus libratus
Lambe, 1914
Gorgosaurus (Latin for "fierce lizard") is a genus of carnivorous dinosaur that reached 8 to 9 meters (26 to 30 feet) in length, and weighed 2.5-3 tonnes. It was first described by paleontologist Lawrence Morris Lambe in 1914, and has been found in western Canada and the United States. It lived about 70-65 million years ago in the late Cretaceous period.

Gorgosaurus Skeleton


Gorgosaurus Size

Over 20 Gorgosaurus skeletons have been recovered, making it the most well-represented tyrannosaurid in the fossil record. Generally

similar to Tyrannosaurus and most other large tyrannosaurids (such as Daspletosaurus, and Albertosaurus), Gorgosaurus can be described as having a massive head, large, curved teeth, tiny two-fingered front limbs, and powerful legs. Compared to the other tyrannosaurids, Gorgosaurus is most similar to its very close relative Albertosaurus.

Although it has been suggested that Gorgosaurus was a scavenger, its co-existence with the similarly sized, but more robust tyrannosaurid Daspletosaurus casts doubt on this theory. Another hypothesis proposes that Gorgosaurus, which was rather lean for a tyrannosaurid, actively hunted fleet-footed animals such as duckbills and ornithomimids ("ostrich-mimic" dinosaurs). Acc

File:Walking With Dinosaurs - Dino Files Gorgosaurus

ording to this proposition, the more troublesome ceratopsians and 

ankylosaurians (horned and heavily armoured dinosaurs) would have been left to Daspletosaurus. An apex predator, it was at the top of the food chain.

For years, the species Gorgosaurus libratus (the only species of Gorgosaurus currently recognized) was assigned to the Albertosaurus genus. However, recent work done by paleontologists suggest that enough differences exist between G. libratus and the other Albertosaurus species, to justify the original genus name of Gorgosaurus.

In Popular Culture

Gorgosaurus had a large role in the movie March of the Dinosaurs, where it was show to be "king of the
  • Walking with Dinosaurs: The 3D Movie
  • March of The Dinosaurs Gorgosaurus
North". It stalked a herd of Edmontosaurus and Pachyrhinosaurus and an Edmontonia and bullied around a Troodon pack. It was finally killed when the Edmontonia hit it in the leg with its tail and crippling it, causing it to starve to death.

It's the main antagonist of Walking with Dinosaurs: The 3D Movie. 

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