in 1975 by W. Langston Jr. to Pachyrhinosaurus were also recovered at the Scabby Butte locality. Another Pachyrhinosaurus bonebed, on the Wapiti River...

the outside than the comparable spikes of Pachyrhinosaurus. Achelousaurus also differs from Pachyrhinosaurus in its smaller nasal boss that does not reach...

group not with Styracosaurus albertensis, but in a clade including Pachyrhinosaurus, Einiosaurus and Achelousaurus, and therefore McDonald and Horner gave...

had spanned the gap between the older Styracosaurus and the later Pachyrhinosaurus. He deliberately declined to name these three taxa. The oldest form...

Pachyrhinosaurus canadensis. Until 2016, the only division used was Pachyrhinosaurini, which is defined as centrosaurines closer to Pachyrhinosaurus canadensis...

displays or for intraspecific combat. The massive bosses on the skulls of Pachyrhinosaurus and Achelousaurus resemble those formed by the base of the horns in...

friend Patchi. Patchi is the youngest and smallest in a litter of Pachyrhinosaurus hatchlings and is often bullied by his older brother Scowler. Their...

same animal. Other members of the Centrosaurinae subfamily include Pachyrhinosaurus, Avaceratops, Einiosaurus, Albertaceratops, and Achelousaurus. The...

migrating. It shows a 1000-mile autumn migration of Edmontosaurus and Pachyrhinosaurus from their summer grazing in northwest Canada (then well inside the...

regalis-Pachyrhinosaurus canadensis zone. As the name suggests, two common terrestrial herbivores in these lower strata were Pachyrhinosaurus and Edmontosaurus...