Spinosaurus aegyptiacus
Theropod
Early Cretaceous
Tegana Formation
Taouz, Morocco

110mm phalanx.

Spinosaurus was one of the largest theropod dinosaurs of all time, perhaps exceeding 50 feet in length and weighing maybe 7-10 tons.  It has been interpreted as a semi-aquatic predator with teeth and a lifestyle much like a crocodile.