Genus: Diabloceratops KIRLAND & DEBLIEUX, 2010
Etymology: Spanish, diablo, "devil"; in reference to the pair of long sweeping spines on the back of the frill and Greek, ceratops, "horned face."

Species: eatoni KIRLAND & DEBLIEUX, 2010
Etymology: In honor of Jeffery G. Eaton, a paleontlogist at Weber State University in Ogden, Utah, in recongnition for his extensive work on the Cretaceous vertebrate faunas of southern Utah, and his role in the establishment of Grand Staircae-Escalante National Monument.
= Genus: Nova KIRKLAND & DEBLIEUX, 2006, 2007

Holotype: UMNH VP 16699

Locality: 42Ka800V, south side of Last Chance Canyon, north flank of Reynolds Point, west of Smoky Mountain Road, central Kaiparowits Plateau, Grand Staircase-Escalante National Monument (GSENM), Kane County, Utah.

Horizon: Middle Mudstone Member, Wahweap Formation.


Age: Aquilian in age, Lower Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material: Entire left side of the skull including the midline. The skull was sagitally sectioned by erosion through the right side, resulting in the loss of the right squamosal, half of the right postorbital horn, jugal, and part of the right maxilla. A number of fragments from the right side were recovered. A rib had come to rest between the two horns lying against the left side of the face. A partial splenial was also found adjacent to the skull during excavation.