Parasaurolophus walkeri

 

Parasaurolophus walkeri (Parks, 1922) 

Dinosauria 

Ornithischia 

Ornithopoda 

Ankylopollexia 

Hadrosauridae 

Lambeosaurinae 

Parasaurolophini 

Campanian (Late Cretaceous) 

Dinosaur Park Formation 

Alberta, Canada 

Length: 9-10 m 

Parasaurolophus's crest was hollow and at least partly made of its nasal bones, allowing it to make loud calls. 

Sunday, July 5th, 2026