Albertosaurus
Albertosaurus was about 30 feet (9 m) long, about 11 feet (3.4 m) tall at the hips, and up to 3 tons in weight (averaging roughly 2500 kg). Its lower jaw had 14 to 16 teeth; the upper jaw had 17-19 teeth. It had one row of teeth in each jaw and had at least one replacement tooth growing up under each working tooth.