Stegosaurus stenops

Because its back was covered with diamond-shaped plates, Stegosaurus was given a name that means "roof lizard." Its back legs were about twice as long as its front legs. This plant eater's jaw was toothless in front and had small, leaf-shaped teeth in back. Nice tail spikes, huh?

Image credits: main image, Rick Spears; stumper image, © AMNH.