and parietal bones

The ankylosaur's head was small in relation to its body and was protected by a bony structure called a "helm

where it had to compete with other large predators

Approximate measurements of the skeleton:

while the battery of teeth in its jaws allowed it to crush tough

Pachyrhinosaurus canadensis Variant:Unprimed and parietal bonesPachyrhinosaurus canadensis was a large ceratopsian dinosaur that inhabited North America during the Late Cretaceous, approximately 73 to 70 million years ago. Its remains have been found primarily in Alberta, Canada, and constitute one of the most complete records of ceratopsians from that region. This quadrupedal herbivore measured between 6 and 8 meters in length , reached about 2 meters in height at the hip , and weighed between 3 and 4 tons . It