Daspletosaurus/Tyrannosaurus torosus


Muscular, frightful lizard


26-30 feet long, 8 feet tall


2-4.2 short tons


Carnivorous: Hadrosaurs, mostly Ceratopsids and herbivorous theropods such as Ornithomimosaurs



Fossil Range

77-74 million years ago: Living for approximately three million years


North America

Did You Know...

Daspletosaurus has the most unnamed species of any other tyrannosaur yet known?


Daspletosaurus torosus feeds on a ceratopsian.

Daspletosaurus torosus is a medium tyrannosaurine (except maybe for the dubious tyrannosaur Nanotyrannus) and perhaps the smartest one. Characteristic to tyrannosaurs it had two fingers on each hand and was probably, at least on some parts of the body, feathered.

The genus Daspletosaurus consists of many unnamed species. One specimen was a stretch-snouted specimen, similar to a juvenile Tyrannosaurus or Alioramus. Another is from the Two Medicine Formation in Montana, United States.

Daspletosaurus torosus grew to 30 feet long and about 8 feet tall. Specific weights are at 3.18 tons.

Perhaps the most spectacular thing about this genus is that it coexisted with another tyrannosaur, Gorgosaurus. This tyrannosaur had small differences compared to Daspletosaurus. Yet they were roughly all the same. The coexistence of Gorgosaurus and Daspletosaurus has been explained by scientists through different habits of their predation. Daspletosaurus would eat heavily protected ceratopsians; its body was very heavy; suitable for big blows that ceratopsids would cause. Gorgosaurus would eat the lighter hadrosaurs (duck-billed-dinosaurs); its body was very light, so if it got hit by a hadrosaur it wouldn't have got as injured as it would be by a ceratopsian.

Other animals in Daspletosaurus's environment were the saurischians Troodon, Dromaeosaurus, Elmisaurus, Dromiceiomimus, and Richardoestesia. The ornithischians in its environment were Albertaceratops, Centrosaurus, Chasmosaurus, Corythosaurus, Euoplocephalus, Gryposaurus, and Lambeosaurus.

Classification and History of DiscoveriesEdit


Superorder: Dinosauria

Order: Saurischia

Suborder: Theropoda

Unranked: Coelurosauria/Tyrannoraptora

Superfamily: Tyrannosauroidea

Family: Tyrannosauridae

Subfamily: Tyrannosaurinae

Tribe: Tyrannosaurini

Genus: Daspletosaurus/Tyrannosaurus

Species: Daspletosaurus/Tyrannosaurus torosus

Daspletosaurus torosus fits into the superorder Dinosauria obviously, skipping down, T. rex fits in the unranked suborder Coelurosauria, the superfamily Tyrannosauroidea, the family Tyrannosauridae, the subfamily Tyrannosaurinae, the tribe Tyrannosaurini and the genus Daspletosaurus. Yet controversy remains, some believe it is a member of the genus Tyrannosaurus.

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