One other feature set Ouranosaurus
apart from its relatives. It had a thin sail made of skin running from the back of its
neck to the end of its tail. There may also have been a piece of skin under its chin. The
skin probably carried blood vessels.
These would remove heat from the
body of the dinosaur. The heat would be carried to the surface of the skin and radiated
away into the air. In this way the dinosaur would cool itself in hot weather. In cold
conditions, the sail would have gathered heat from the sun. The blood would have carried
heat to the body, arms, and legs to warm them.
Diet: Leafy vegetation
Size: Length 7m (23ft)
Time (million years ago): 115