Sarcosuchus and Ouranosaurus reptiles, illustration. Sarcosuchus (foreground) was a crocodile-like reptile that lived around 112 million years ago, during the Early Cretaceous, in what is now Africa and South America. It reached up to 12 metres in length, and was one of the largest crocodyliforms ever. Ouranosaurus was a herbivorous ornithopod that lived around 125 to 112 milion years ago, during the Early Cretaceous, in what is now Africa. It reached lengths of seven to eight metres.