| − | '''''Stegosaurus''''' (Greek: στέγος ''stegos'', and σαῦρος ''sauros''; "roof lizard") was a genus of [[dinosaurs]] characterized by large, flat bony plates along its back. | + | '''''Stegosaurus''''' (Greek: στέγος ''stegos'', and σαῦρος ''sauros''; "roof lizard") was a genus of [[dinosaurs]] characterized by large, flat bony plates along its back. Stegosaurus had the smallest brain size of any dinosaur, measuring no larger than a walnut. |