Stegosaurus

Easily one of the best known of all the dinosaurs ever, Stegosaurus (STEG-oh-SAW-rus meaning plated lizard) is recognized the world over. It roamed plains of the Late Jurassic Period in what's now North America. It had bony plates on its back and four sharp spikes on its tail. It was a prey item for Ceratosaurus and Allosaurus.

More Real Life Information: Stegosaurus at Wikipedia