Rise of the Giants Diabloceratops Paleontologists discovered Diabloceratops eatoni Centrosaurines have short faces and in 2002 in Grand Staircase–Escalante National short frills. All early true ceratopsids eatoni appear to be centrosaurines. Take a Monument and excavated the skull between 2003 Order Ornithischia close look at the Diabloceratops skull and 2005. before you. Its short face and short, Suborder Ceratopsia ornamented frill place it squarely in the Family Ceratopsidae n the warm, lush Laramidian landscape both Utah and Canada, suggesting that centrosaurine group. The second sub- Sub-family Centrosaurinae of Utah almost 81 million years early on, similar centrosaurines ranged group, chasmosaurines, sport long Size 12–15 ft (3.7–4.6m), 1–2 tons Iago, Diabloceratops was a dominant widely. Their large heads, complex dental frills and long faces. herbivore (plant-eater), a niche similar arangements, and highly ornamented Size comparison large horse or Take a close look at the skulls to the right to that of the present-day rhinoceros. skulls (fig. d) are traits shared with all small rhinoceros of Diabloceratops. Are they centrosaurines, Scientists have found the fossilized true ceratopsid dinosaurs. Scientists Diet plants or chasmosaurines? remains of Diabloceratops-like animals in identify two main sub-groups within the Age Late Cretaceous, 81 million years ago ceratopsid family. Distribution of Fossil Wahweap Formation, At 80.5 million years old, the Monument’s Grand Staircase–Escalante National Monument Diabloceratops eatoni is the oldest Cool Fact true ceratopsid yet named. • Diabloceratops (“dee-OB-loh- ser-uh-tops”) means “devil horned face.” It was the first new horned dinosaur named from the Monument (early 2010). The species name “eatoni” honors paleontologist Dr. Jeff Eaton for his pioneering work in the monument region..