Category: Dinosaur

Parasaurolophus (Pah-rah-sore-o-loe-fus), Near Saurolophus, was rare lambosaurine with a wide range in western North America and close relative of Charonosaurus in China. Lambeosaurs are charactized by their hollow crests and Parasaurolophus had the largest and most distinctive. Lambeosaurs decline in the fossil record at the end of the Cretaceous in North America are know from Asia and isolated teeth have been referred to Parasaurolophus.



Genera and Species

Classification: Ornithopoda, Iguanodontia, Hadrosauroidea, Lambeosaurinae

Species: P. walker, P. cyrtocristatus, P. tubicen


Parasaurolophus had a crest like swimmer's snorkel, with a curved hollow horn up to 1.8 m (6 ft) long with complex air passages, including breathing passages that ran from nostril up one side of crest and down the other side to the mouth. Possibly this was used to make loud bellowing noises, or perhaps to enhance its sense of smell. It may have had frill from horn to back. Its muzzle was relatively


LENGTH: 10 m (33 ft). WEIGHT: 2.6 tons.


Parasaurolophus was a large herbivore. The hollow crest could be used like a French Horn to signal others over distance. The narrow mouth hints at a selective diet compared to the wide mouthed crestless hadrosasurs.

History of Discovery

Discovered by Parks, 1922 and know from Skulls and partial skeletons


Found in North America (Alberta, Canada; Montana, New Mexico and Utah, USA). In the north and east well watered forests and in the south and west seasonally dry basins.


1. Paul, G. (2010). The Princeton Field Guide to Dinosaurs (pp. 6915). Princeton, New Jersey: University Press Princeton.

2. Worth, G. (1999). The Dinosaur Encyclopaedia (pp. 1716). Scarborough, Western Australia: HyperWorks Reference Software.

3. Griffin. (2010, July 9). Parasaurolophus. .

4. Knol, R. (2012). Late Cretaceous Edmontonian Horseshoe Canyon Formation. . Retrieved April 3, 2014, from [1]