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Gorgosaurus (/ ˌ ɡ ɔːr ɡ ə ˈ s ɔːr ə s / GOR-gə-SOR-əs; lit. ' dreadful lizard ' ) is a genus of tyrannosaurid theropod dinosaur that lived in western North America during the Late Cretaceous Period ( Campanian ), between about 76.5 and 75 million years ago . [ 1 ]
Gorgosaurus and Albertosaurus are extremely similar, distinguished mainly by subtle differences in the teeth and skull bones. Some experts consider G. libratus to be a species of Albertosaurus; this would make Gorgosaurus a junior synonym of that genus. Gorgosaurus lived in a lush floodplain environment along the edge of an inland sea.
Albertosaurinae was recovered as including only Albertosaurus and Gorgosaurus. [3] Albertosaurus and Gorgosaurus are kept separate by most classifications, [2] [3] as should be according to Currie. [17] The cladogram below was found during the analysis of Nanuqsaurus by Anthony Fiorillo and Ronald Tykoski. [3]
A scientific publication by Phil Bell and colleagues in 2017 show that tyrannosaurids such as Gorgosaurus, Tarbosaurus, Albertosaurus, Daspletosaurus, and Tyrannosaurus had scales. The Bell et al. 2017 paper notes that the scale-like integument on bird feet were actually secondarily derived feathers according to paleontological and evolutionary ...
Gorgosaurus juvenile specimen TMP 2009.12.14, featuring stomach contents comprising remains of Citipes. In 2023, a juvenile Gorgosaurus with its in situ stomach contents containing two Citipes juveniles about a year old intact has been reported from the Dinosaur Park Formation. This juvenile would have been 5-7 years old at the time of death ...
Paleontologist Robert T. Bakker with a mounted skeleton of a tyrannosaurid (Gorgosaurus libratus) New revelations were supported by an increase in dinosaur discoveries. Major new dinosaur discoveries have been made by paleontologists working in previously unexplored regions, including India, South America, Madagascar, Antarctica, and most ...
Gorgosaurus libratus: AMNH 5458 American Museum of Natural History: New York: New York: USA: Skeleton Gorgosaurus libratus: USNM 12814 National Museum of Natural History: Washington: D.C. USA: formerly AMNH 5428 Skeleton Gorgosaurus libratus: TMP 91.36.500 Royal Tyrrell Museum of Palaeontology: Drumheller: Alberta: Canada: Sub-adult specimen ...
Before the formal description of Nanuqsaurus, numerous tyrannosaurid teeth were known from the Kogosukruk Tongue of the Prince Creek Formation and were first referred to the genus Gorgosaurus. [1] Later, after the locale was understood to be younger than previously thought, the consensus switched to referring to the teeth under the genus ...