Ouranosaurus means 'brave lizard'. Ouranosaurus was a monitor lizard and a very non-usual iguanodont that existed during the early stage of the Cretaceous Age, about 110 to 115 million years ago. It is believed to have roamed freely in the region/continent currently known as Africa. Ouranosaurus was about 7 meters long and it weighed nearly 4 tons! Its fossilized remains were discovered in the 'ElRhaz Formation', Agadez and Gadoufaouna deposits. The dinosaur was given its name in 1976 by the french paleontologist named Philippe Taquet.

Ouranosaurus' back had a large 'sail'. The thick and long spines alongside, supported the sail. The sail went through its back all the way to its tail, just like that of the spinosaurus. The supporting spines on the back of the Ouranosaurus turn thicker as they move from the center to the extremities and tendons helped holding the spines together. It has also been observed that the Ouranosaurus, which had a stiffened back, also had the peak of the spine length around the forelimbs, indicating the possibility of a hump, like that of a camel!

Each of the Ouranosaurus' hands had a thumb claw. The other digits were very hoof like in appearance and hence, better conditions for walking. Its hindlimbs were relatively large in order to accommodate the body's weight and balance. Ouranosaurus had small feet with three toes each. It had a long head and this herbivore had a beak as in the duck, no jaws!