Cretaceous Period, 145-65 million years B.P. A large Carcharodontosaurus saharicus (African T-rex) dinosaur tooth, with serration and enamel; held in a white card collector's tray. 15 grams, 65 mm length, (21 grams total, 80 x 53 mm including tray) (2 1/2 in. (3 1/4 x 2 in.)). Tegana formation of the Sahara Desert, Morocco, North Africa. Acquired 1980s. Old Lincolnshire collection. Carcharodontosaurus saharicus often known as the African T-rex. 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.