Cretaceous Period, 125-113 million years BP. A large example of a dinosaur tooth, Carcharodontosaurus saharicus, or African T-rex. 15.8 grams, 50mm (2"). From an old Lincolnshire collection acquired during 1980s; from the Sahara Desert, Morocco. The Carcharodontosaurus saharicus was one of the largest predators (larger than its distant North American T-Rex cousin) of all time and is also related to Allosaurus and the South American Giganotosaurus.