Pachyrhinosaurus Facts
| Diet | Herbivore |
| Height | 2.5m |
| Length | 6m |
| Weight | 2.5 tonnes |
| Speed | 25 km/h |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Ceratopsian |
| Location | North America |

| Diet | Herbivore |
| Height | 2.5m |
| Length | 6m |
| Weight | 2.5 tonnes |
| Speed | 25 km/h |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Ceratopsian |
| Location | North America |
Pachyrhinosaurus was a remarkable ceratopsian dinosaur that roamed the forests and plains of Late Cretaceous North America between 83.6 and 72.2 million years ago. Unlike its famous relatives Triceratops and Styracosaurus, this herbivorous giant had a most unusual feature - instead of long pointed horns, it possessed a thick, bumpy mass of bone called a boss covering its nose and forehead area.
Measuring approximately 6 metres in length and standing 2.5 metres tall at the hip, Pachyrhinosaurus was built like a living tank. Its massive skull could reach over 1.5 metres long and featured the characteristic neck frill of ceratopsian dinosaurs, adorned with spikes around the edges. The creature's powerful beak and rows of grinding teeth were perfectly adapted for processing tough plant material including ferns, cycads, and conifers.
First discovered by Charles M. Sternberg in Alberta in 1946, Pachyrhinosaurus has since become one of the best-known ceratopsians thanks to numerous fossil discoveries across Alberta and Alaska. These finds have revealed that different species existed, each with slight variations in their distinctive facial features. The abundance of fossils suggests these dinosaurs lived in large herds, migrating seasonally across the ancient landscapes of northern North America.
Pachyrhinosaurus is instantly recognisable by its thick, bumpy bone mass (called a boss) covering the nose and forehead area instead of the pointed horns seen in other ceratopsians. Its large neck frill was decorated with spikes around the edges, and it possessed a powerful parrot-like beak for cutting vegetation.
Pachyrhinosaurus lived in large herds and likely migrated seasonally across northern North America, as evidenced by extensive bone beds containing multiple individuals. These social dinosaurs probably used their distinctive nasal bosses for head-butting contests during territorial disputes or mating displays, similar to modern bighorn sheep.
Pachyrhinosaurus appeared in the BBC documentary series 'Walking with Dinosaurs: The 3D Movie' and features in several dinosaur video games and educational programmes focusing on Arctic dinosaurs.
Pachyrhinosaurus was first described by Charles M. Sternberg in 1950. The original fossils were discovered at Alberta, Canada.