Mononykus was a theropod dinosaur from late Cretaceous Mongolia (Nemegt Formation, about 70 million years ago) with long, skinny legs. It moved about on two legs, was very nimble, and could run at high speeds, something that would have been useful in the open desert plains where it lived.

Jurassic ParkEdit

Mononykus has never appeared or been mentioned in any Jurassic Park films or books, it has however appeared in Jurassic Park III: Park Builder (albeit with a misspelled name).