Ankylosaurus (which means 'fused lizard')'s a genus of ankylosaurid dinosaur, containing one species, A. magniventris. Fossils of Ankylosaurus are found in geologic formations dating to the very end of the Cretaceous Period in western North America. Although a complete skeleton hasn't been discovered and several other dinosaurs are represented by more extensive fossil material, Ankylosaurus's often considered the archetypal armored dinosaur. Other ankylosaurids shared its well-known features, l… (More on Ankylosaurus)