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Pachyrhinosaurus (meaning "thick-nosed reptile") is a genus of ceratopsid dinosaur from the Late Cretaceous period of North America. The first examples were discovered by Charles M. Sternberg in Alberta, Canada, in 1946, and named in 1950. Twelve partial skulls and a large assortment of fossils have been found in total in Alberta and Alaska. A great number were not available for study until the 1980s, resulting in a relatively recent increase of interest in the Pachyrhinosaurus. Instead of horns, the skull bears massive, flattened bosses, the largest being over the nose. These were probably used in butting and shoving matches, as in musk oxen. A single pair of horns grew from the frill and extended upwards or sideways in some specimens.

This 18-foot long "Thick-nosed reptile" was a horned dinosaur, with a short beak, and a low face crowned by a massive, bony boss. Named for the rough, thickened bones in place of the nasal horn typically found in large ceratopsians; some researchers think the boss may have supported a huge keratinous horn without a bony core, but direct fossil evidence for such a growth is lacking.

I customized a Resaurus Styracosaurus figure (a close relative) to create this model.