Jurassic Park Wiki

Prosaurolophus (before Saurolophus, in comparison to the later dinosaur with a similar head crest) is a genus of hadrosaurid (or duck-billed) dinosaur from the Late Cretaceous of North America. It is known from the remains of at least 25 individuals belonging to two species, including skulls and skeletons, but it remains obscure.

Wikipedia has a more detailed and comprehensive article on Prosaurolophus

Jurassic Park franchise

Prosaurolophus appeared in the website Jurassic Park: Institute on Dinopedia. Prosaurolophus appeared in the Dinosaur Field Guide as well as the Jurassic World Dinosaur Field Guide.