Muttaburrasaurus (meaning ” Muttaburra Lizard”) is a species of iguanodontian from Early Cretaceous Australia. In 1963, Doug Langdon found the Muttaburrasaurus. It was finally named in 1981, Muttaburrasaurus langdoni, after Doug Langdon. It is the largest herbivorous dinosaur from Australia that is not a sauropod. It was 26 feet long (8 meters) and about 5 tons. It has a nose sack it uses to communicate with its herd. About two other iguanodontids , Altirhinus and Gryposaurus have this unusual feature.