Hypsilophodon is a very small species of ornithopod dinosaur that lived in the early Cretaceous period in Europe, in England to be exact, and was very similar to the earlier Othnielia and Dryosaurus, which lived only in North America.

Wikipedia has a more detailed and comprehensive article on Hypsilophodon

Jurassic Park novel

"Hypsilophodontids" and "hypsilophodonts" are one of the several species of Dinosaur featured in the Jurassic Park novel. But these titles not necessarily refer to the Hypsilophodon genus.

When Gerry Harding captures a "Hypsilophodont" this information is given:

In the harsh quartz lights, the hypsilophodont's green head hung down out of the sling, the tongue dangling, the eyes dull. ... The hypsy was a small dryosaur, seven feet long, weighing about five hundred pounds.[1]

This means that Dryosaurus is the only genus of which we can be sure that it appeared in the first novel.

However, on pg. 176 of The Lost World, Hypsilophodon does indeed make a physical appearance; also, the name Dryosaurus is not mentioned in the second novel, meaning the two could potentially be separate genera of dinosaurs. In the book, the Hypsilophodons were living on a marshy plain that was close to the river on the southern side of the island.

Jurassic Park video games

It appeared in Jurassic Park 2: The Chaos Continues Gameboy version only,

Hypsilophodon from Jurassic Park III: Park Builder.

Hypsilophodon appears in the Game Boy Advance game Jurassic Park III: Park Builder.


  1. Jurassic Park (novel), The Park, page 245 (Novel bundle).