Diet: Muttaburrasaurus was an herbivore (it ate only plants); it had grinding teeth. It may have eaten cycads, ferns, and conifers.

Anatomy: Muttaburrasaurus was about 24 feet (7 m) long. It had a large bulge on its long snout between its eyes and its mouth, a flattened thumb spike, hoof-like claws, and teeth that worked like shears. The bony bump on its snout may have been associated with its sense of smell or its ability to make sounds. An ornithopod, it is either an iguanodontid or a camptosaurid dinosaur.

Name and Fossils: Muttaburrasaurus means "Muttaburra (in Queensland, Australia) lizard." Muttaburrasaurus was described and named by Ralph E. Molinar and Alan Bartholomai in 1981 from a fossil found at Muttaburra in central Queensland, Australia (it was found by Doug Langdon). The type species is M. langdoni.