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More about Albertosaurus
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Albertosaurus was a large, meat-eating dinosaur, a tyrannosaurid that lived during the late Cretaceous period, roughly 76-74 million years ago. Albertosaurus was smaller than T. rex and lived a few million years earlier than T. rex.

Fossils: Many Albertosaurus fossils have been found in Alberta, Canada, and in the western USA. Fossils called Gorgosaurus turned out to be juvenile (young) examples of Albertosaurus.

Anatomy: This saurischian dinosaur walked on two long legs and had a large head with sharp, saw-toothed teeth. It had two-fingered hands on short arms. Its long tail provided balance and quick turning. Albertosaurus had powerful back legs with clawed, three-toed feet. No one knows what color Albertosaurus was (or indeed, what color any of the dinosaurs were). Albertosaurus was about 30 feet (9 m) long, about 11 feet (3.4 m) tall at the hips, and up to 3 tons in weight (averaging roughly 2500 kg). The lower jaw of Albertosaurus had from 14 to 16 teeth; the upper jaw had 17 to1 9 teeth. It had one row of teeth in each jaw but had at least one replacement tooth growing up from under each tooth.

Name: Albertosaurus (meaning "Alberta lizard") was named by Joseph Burr Tyrrell in 1884 from fossils found in western Canada. The type species is Albertosaurus sarcophagus.

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