Ankylosaurus is a genus of armored dinosaur that lived in western North America in the Late Cretaceous Period. It had a wide, low skull with horns and a beak, and a club on the end of its tail. Learn about the Ankylosaurus, a herbivorous dinosaur with a club-like tail and a bony armor. Discover its origins, fossil evidence, size, habitat, and interesting facts. Ankylosaurus Ankylosaurus Welcome Welcome to Ankylosaurus.org our website about one of the most unusual looking and interesting of dinosaurs. Ankylosaurus was an armored dinosaur that ate plants ("herbivore). It lived at the end of the Cretaceous period, between about 74 and 65 million years ago. Ankylosaurus lived during the Late Cretaceous Period in what is now North America. This armoured dinosaur had bony plates covering its body and a heavy club at the end of its tail.