Paleontologists have discovered fossil teeth from the Pachycephalosaurus dinosaur in the desert of Coahuila state in northeastern Mexico.
This is the first time that this type of dinosaur has been found in Mexico.
Mexican archaeologists say the Pachycephalosaurus dinosaur belongs to a family of dinosaurs that live on plant food, move on two legs, which existed in the Cretaceous (or Cretaceous) era about 75 million years ago. The newly found fossil tooth is 5mm long and is the tooth of an adult 2m long dinosaur.
Related reading: 9-year-old boy found fossil dinosaur eggs 66 million years.
Pachycephalosaurus , also known as the big head lizard , has an domed head and uses this part as a powerful weapon to knock out other dinosaur opponents' flanks. Fossils of this dinosaur have been found in North America and Asia.
