Nanosaurus

Othnielia was a small herbivorous Ornithopod Dinosaur that lived 150 to 140 million years ago, in the Late Jurassic. It was discovered in the late 1800s by men working for Othniel Charles Marsh, for whom it was soon named after. Ironically, Othnielia's closest relative, Drinker, was named for Marsh's archrival, Edward Drinker Cope.

In Jurassic Park
Othnielia was seen in the novel version of Jurassic Park, as a half-arboreal herbivore, a view about the smaller ornithopods that has recently been disproved. It apparently had a color similar to that of the novel's Velociraptors, as when Tim saw a Velociraptor in the Othnielia paddock, the adults thought he had mistaken an Othnielia for a raptor. Othnielia does not appear in any video games, either, although its relative, Dryosaurus, is a one-star small herbivore in Jurassic Park: Operation Genesis.