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Corythosaurus was a large, plant-eating, duck-billed dinosaur with a head crest. The crest may have been used to make sounds, as a cooling device, for courtship displays, and/or as a sense-of-smell enhancer. Corythosaurus lived during the late Cretaceous period, roughly 80 to 65 million years ago.

Anatomy: Corythosaurus had short arms, a long, pointed tail, three-toed, hoofed feet, and mitten-like hands. A hollow, bony crest adorned its head. This hadrosaur (duck-billed dinosaur) had a toothless beak, cheek pouches, and hundreds of closely-packed cheek teeth that ground up its food. It was about 30 feet (9 m) long and may have weighed up to 5 tons. Corythosaurus was a biped (it walked on two legs) that could also walk on four legs, perhaps to graze low-lying plants.

Fossils and Name: Corythosaurus means "Helmet Lizard." Corythosaurus was named by Barnum Brown in 1914 from a fossil found in Alberta, Canada. Fossils have been found in North America, including Montana, USA, and Alberta, Canada. Fossilized Corythosaurus skin with a pebbly texture has been found.

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