Rayososaurus was named by Bonaparte in 1995. It may have had a sail on its back. Fossils have been found in Morocco and Niger, Africa. The type species is R. garasbae . Rebbachisaurus was named by Lavocat in 1954.
Recurved teeth are teeth that curve back towards the animal.
This type of teeth make it very hard for prey to escape. Another causes is the local uplift of the continental land. Compare with absolute age dating . The type species is R. callenderi . This is a duious genus of dinosuar due to the sparsity of fossils.