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Albertosaurines are large, lightly built tyrannosaurids. Compared to tyrannosaurines, they are more slender and have shorter, flatter skulls, shorter ilia, and proportionally longer tibiae. Albertosaurines and tyrannosaurines share arms of about equal length, with the exception of Tarbosaurus, which had short arms for its size. [1]
Like albertosaurines, tyrannosaurines also had heterodont dentition, large heads design to catch and kill their prey, and short didactyl arms. Based on the growth stages of Tyrannosaurus (and possibly Tarbosaurus [20]), tyrannosaurines undergone ontogenetic changes from gracile or slender, semi-longirostrine immatures to robust, heavy-headed ...
Tyrannosaurus (/ t ɪ ˌ r æ n ə ˈ s ɔː r ə s, t aɪ-/) [a] is a genus of large theropod dinosaur. The type species Tyrannosaurus rex (rex meaning 'king' in Latin), often shortened to T. rex or colloquially T-Rex, is one of the best represented theropods.
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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.
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Albertosaurus was a fairly large bipedal predator, but smaller than Tarbosaurus and Tyrannosaurus rex. Typical Albertosaurus adults measured up to 8–9 m (26–30 ft) long [19] [20] [3] and weighed between 1.7 and 3.0 metric tons (1.9 and 3.3 short tons) in body mass. [32] [3] [33] [2]
Valley of the T. rex is a Discovery Channel documentary, featuring paleontologist Jack Horner, that aired on September 10, 2001.The program shows Horner with his digging team as they travel to Hell Creek Formation in search for dinosaur fossils, while also following Horner as he presents his view of the theropod dinosaur Tyrannosaurus rex as a scavenger rather than a predator, as it is often ...