Parksosaurus is an ornithischian dinosaur, that lived in Alberta, during the Late Cretaceous period. It was a smallish dinosaur - roughly 2.5 m long, and weighed about 45 kilograms.
In the Series 2 episode "Super Croc II: River of Death," a flock of Parksosaurus were brought to the park from Late Cretaceous Alberta, 75 million years ago.