Named "iguana tooth" because it had teeth like modern iguana lizards, Iguanodon is one of the most famous dinosaurs. It belongs to a family similar to Camptosaurus but larger, heavier, a better equipped to eat. Its mouth was large, with teeth in the cheeks. In front was a bony beak like Hypsilophodon. Iguanodon usually stood on fours. It had big, strong thighs and three-toed feet. Its smaller front legs each had four fingers and a spiked thumb. When it reared up to rest the base of its tall, it would have stretched up to feet tall. It had a length of almost 30 feet.

Iguanodon first appeared more than 120 million years ago and lived 55 million years, becoming extinct at the same time as all the other dinosaurs. Other members of the Iguanodon family included Muttaburrasaurus and Ouranosaurus. lguanodon probably roamed swampy countryside, wading, through hot marshland looking for food. It could wrap its long tongue around reeds and thick grasses. Sucked into its large mouth, small branches and tough roots would be crunch, with its two rows of cheek teeth.

Location: Belgium, England, Germany, Spain, USA

Diet: Horsetails, ferns and probably flowering plants

Size: Length 9m

      Weight 4.5tonnes

Classification:

Family Iguanodontidae

Suborder Ornithopoda

Order Ornithischia

Time (million years ago): 140-110