Ceratopsian (Judith River Formation) - Shoplivepages::jquery();?>
All known species of Ceratopsidae were quadrupedal herbivores from the Upper Cretaceous, predominantly discovered in Western North America. The species are characterized by beaks, rows of shearing teeth, elaborate nasal horns and a thin parietal-squamosal shelf that extends up into a frill. Ceratopsidae are divided into two subfamilies. The Chasmosaurinae, characterized by long, triangular frills and well-developed brow horns, and the Centrosaurinae with well-developed nasal horns, shorter and more rectangular frills, and elaborate spines on the back of the frill. Several Ceratopsidae have been discovered in The Judith River Formation, Montana where our fossils were sourced including Medusaceratops, Avaceratops, Judiceratops, Mercuriceratops, Spiclypeus and Dysganus.