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Prosaurolophus (meaning “Prior Crested Lizard”) is a genus of saurolophinae dinosaur from the Late Cretaceous of the US and Canada. The type species, P. maximus, was described in 1916 by Barnum Brown, the discoverer of Tyrannosaurus rex. A second species, P. blackfeetensis, was described in 1992 by Jack Horner. Jack Horner differentiated P. blackfeetensis from […]

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