Pachyrhinosaurus

Say it like this: “pak-i-RIEN-o-SAWR-us”

Pachyrhinosaurus canadensis

Pachyrhinosaurus ate plants and walked on four legs. It lived in the Late Cretaceous. Bones have been found in Canada and the United States.

Quiz me on Pachyrhinosaurus

When: Late Cretaceous (Campanian · Maastrichtian) · roughly 83.6 to 66 million years ago
Named in: 1950 · Sternberg, C. M.
Hip height: Not established
Length: 5–8 m · 16–26 ft
Weight: 2–4 tonnes
Found in: Canada and the United States · St. Mary River
Food and walking: Herbivore · Four legs
Kind: horned dinosaur · Ceratopsian
Family branch: Centrosaurinae

The story in short

In 1950, C. M. Sternberg published the name Pachyrhinosaurus. The name honors a person tied to the fossil or its study.

Fossils referred to Pachyrhinosaurus date to the Late Cretaceous (Campanian · Maastrichtian), roughly 83.6 to 66 million years ago. Finds come from Canada and the United States, including the St. Mary River Formation. It was a herbivore and walked on four legs.

Published estimates put Pachyrhinosaurus at a length near 5–8 m and a body mass around 2–4 tonnes.

On the family tree it sits in Centrosaurinae, among the horned dinosaurs.

This entry is the whole genus. The type species is Pachyrhinosaurus canadensis. Other named species include Pachyrhinosaurus lakustai and Pachyrhinosaurus perotorum.

Other species with this name

Pachyrhinosaurus canadensis
Pachyrhinosaurus lakustai
Pachyrhinosaurus perotorum

Close relatives

Achelousaurus

Achelousaurus horneri

Late Cretaceous (Campanian) · roughly 83.6 to 72.2 million years ago

Albertaceratops

Albertaceratops nesmoi

Late Cretaceous (Campanian) · roughly 83.6 to 72.2 million years ago

Avaceratops

Avaceratops lammersi

Late Cretaceous (Campanian) · roughly 83.6 to 72.2 million years ago