Muttaburrasaurus

Muttaburrasaurus ("Lizard from Muttaburra") has a stocky, well-muscled body. Although the only mounted skeleton in the world is shown with a thumb spike as big as Iguanodon's, some scientists question the restoration of this feature. That's because the origional "spike bone in Muttaburrasaurus is only partially preserved.

One feature Muttaburrasaurus has in common with later ornithopods, or two-legged plant-eating dinosaurs, is its large nose. It is not known if this nose allowed Muttaburrasaurus to communicate, as the hadrosaurs are believed to have done. Those nose is closer to the tip of the snout than in hadrosaurs, but it is still large enough to block any stereoscopic vision directly ahead. Humans and predators have stereoscopic vision, which allows them to see in depth. Plant-eating dinosaurs and other prey have non-overlapping fields of vision, which gives them the ability to see more widely but hinders depth perception.