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Daspletosaurus (pronounced /dæsˌpliːtɵˈsɔːrəs/ das--o--rəs, meaning 'frightful lizard') is a genus of tyrannosaurid theropod dinosaur that lived in western North America between 80 and 73 million years ago, during the Late Cretaceous Period. Fossils of the only named species (D. torosus) were found in Alberta, although other possible species from Alberta, Montana and New Mexico await description. Including these undescribed species, Daspletosaurus is the most species-rich genus of tyrannosaur.
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