Parasaurulophus

Parasaurolophus walkeri is a species of hadrosaur from the late Cretaceous period it appeared in the episode prehistoric Los Angeles. Parasaurolophus was different from other hadrosaurs because of the distinctive crest on it's head used to attract mates it was also made very loud noises to drive off predators like Tyrannosaurs. Parasaurolophus was 9 metres long and 4 metres tall. Parasaurolophus lived almost everywhere in North America meaning it was a common species.

Trivia

 * Parasaurolophus was discovered by Parks in 1922.
 * Parasaurolophus could run at 40 kph.
 * Parasaurolophus was once thought to use it's horn as a snorkle.
 * Parasaurolophus was both a biped and a quadroped.
 * Parasaurolophus main predator was Tyrannosaurus Rex.

In the series...
Parasaurolophus appeared in prehistoric Chicago where a heard was seen migrating through Chicago however a tyrannosaur(gorgosaurus) attacked the two parasaurolophus were able to scare it off but later it came back and chased a young parasaurolophus it attacked and successfully killed it. The parasaurolophus heard is seen moving on later.