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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 ]
English: Illustration of the theropod dinosaur Albertosaurus, which has been found in Alberta, Canada. Albertosaurus was related to Gorgosaurus and Tyrannosaurus rex ', and grew up to about 9 - 10 metres ( about 30 feet )long, and weighted about 3 tonnes.
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 ...
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]
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.
In 1890, English naturalist Richard Lydekker made Gorgonops the type species of the family Gorgonopsidae. [ b ] [ 23 ] British palaeontologist Harry Seeley in 1894 believed Gorgonops lacked an opening in the temporal bone (temporal fenestra), which is a diagnostic feature of Theriodontia, and so elevated Gorgonopsidae to Gorgonopsia, distinct ...
Some specimens were found as stomach contents of Gorgosaurus [21] Claosaurus: 1890 Niobrara Formation (Late Cretaceous, Santonian to Campanian) United States ( Kansas) Historically conflated with other hadrosaurs Coahuilaceratops: 2010 Cerro Huerta Formation (Late Cretaceous, Maastrichtian) Mexico ( Coahuila)
Daspletosaurus (/ d æ s ˌ p l iː t ə ˈ s ɔːr ə s / das-PLEET-ə-SOR-əs; meaning "frightful lizard") is a genus of tyrannosaurid dinosaur that lived in Laramidia between about 78 and 74.4 million years ago, during the Late Cretaceous Period.