Carcharodontosaurus (Dinosaur) tooth in a glass display box. From Tegana Formation, North Africa. Cretaceous Age, 65 million years. Carcharodontosaurus is one of the longest and heaviest known carnivorous dinosaurs, with length estimates ranging between 12 and 13 m (39–43.5 ft) and weight estimates between 6 and 15 metric tons. This tooth is from a large Carcharodontosaurus saharicus dinosaur. Potentially larger than a T-Rex, this dinosaur had large serrated "steak-knife" teeth superbly adapted to cutting and rending flesh.