Ouranosaurus

About 7 to 8.3 metres long and weighed around 2.2 metric tons. That is roughly the length of a school bus and the weight of a small car.13

Yes, it had a large sail on its back made of long, wide neural spines. This sail spanned its back.1

It was a plant-eater that used its cheek teeth to chew tough plants like leaves, fruit, and seeds. Its wide beak also suggests it could eat large amounts of low-quality food.1

It lived in what is now Niger and Cameroon in Africa during the Early Cretaceous. It lived in a river delta environment alongside other dinosaurs.1

It lived during the Aptian stage of the Early Cretaceous, about 125 to 113 million years ago. It died out long before the end of the dinosaurs.1

Yes, it was a herbivorous basal hadrosauriform dinosaur. It is not a pterosaur or marine reptile.1

Yes, it had small rounded horns in front of its eyes, making it the only known horned ornithopod dinosaur.1

Scientists do not know its exact speed. It was a large, plant-eating dinosaur with a stiff back, so it was probably not very fast.1