Pachyrhinosaurus is a Ceratopcean from Alaska and Alberta during the Cretaceous period. It is called a Pachyrhinosaurus because instead of a horns it had bore massive, flattened bosses; a large boss over the nose and a smaller one over the eyes. So it acted like the dinosaur Pachycephalosaurus, and head butted others of there season and preditors. It had a sharp beak and a sterdy frill. They lived in large heards with many males and females. It is not as popular as there southern Ceratopcean Triceratop.

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