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Pachyrhinosaurus canadensis skull, Royal Tyrrell Museum.
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Superorder: Dinosauria
Order: Ornithischia
Suborder: Cerapoda
Family: Pachyrhinosauridae
Genus: Pachyrhinosaurus
Sternberg, 1950
  • P. canadensis Sternberg, 1950 (type)
  • P. lakustai Currie, Langston and Tanke, 2008
  • P. perotorum Fiorillo and Tykoski, 2012
  • "P. rexxus" Currie, 2017

Pachyrhinosaurus was a large, plant-eating dinosaur that had a bony, spiked neck frill, four short legs, and a short tail. Pachyrhinosaurus was a short-frilled ceratopsian dinosaur that was 18 to 23 feet (5.5 to 7 m) long. Pachyrhinosaurus had many small horns on the middle of its frill.

pachyrhinosaurus lived in the mid cretaceous period and was similar to the triceratops.

Type specimen of P. perotorum.