What makes Diabloceratops scientifically significant?

Diabloceratops provides critical insights into the evolutionary radiation of Ceratopsia. Holotypes and fossil evidence indicate: Nearly complete articulated skull with intact horn cores and lower jaws (UMNH VP 16699).

Diabloceratops (Diabloceratops eatoni Kirkland & DeBlieux, 2010) - Size, Diet & Cretaceous Period Facts

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Diabloceratops (Diabloceratops eatoni Kirkland & DeBlieux, 2010) - Size, Diet & Cretaceous Period Facts | DinoOrigin

Evolutionary Taxonomy & Cladistics

View Dinosaur Phylogeny

Phylogenetic classification of Diabloceratops eatoni Kirkland & DeBlieux, 2010 based on peer-reviewed cladistic analyses of diagnostic skeletal synapomorphies.

Taxonomic Rank	Taxon / Clade	Diagnostic Context
Kingdom	Animalia	Monophyletic prehistoric clade
Phylum	Chordata	Monophyletic prehistoric clade
Clade	Dinosauria	Monophyletic prehistoric clade
Order	Ornithischia (Bird-Hipped Dinosaurs)	Characterized by a pelvis with a backwards-pointing pubis parallel to the ischium.
Infraorder	Ceratopsia	Ornithischian dinosaurs characterized by beaks, rostral bones, facial horns, and elaborate neck frills.
Genus	Diabloceratops	Monophyletic prehistoric clade
Species	Diabloceratops eatoni Kirkland & DeBlieux, 2010	Specific authority designation

Anatomy & Physical Characteristics

Diabloceratops is one of the oldest and most spectacular centrosaurine ceratopsids ever discovered, dating to approximately 80 million years ago. Unearthed from the Wahweap Formation in Grand Staircase-Escalante National Monument, Utah, it displayed a unique horn combination.

Unlike later centrosaurines that possessed tiny brow horns and large nose horns, Diabloceratops possessed long, upward-curving brow horns resembling devil horns and a pair of long, curved spikes extending backward from the top of its frill.

Diagnostic Morphological Traits

Medium ceratopsid with long sweeping brow horns, small nasal horn, and two long recurved spikes on the upper frill.

Comparative Scale & Biometrics

Anatomical dimensions relative to an average adult human (1.8 m / 6 ft tall)

Approx. 3.1× human length

Diabloceratops (Length)4.5–5.5 m (14.8–18.0 ft)

Adult Human1.8 m (6.0 ft)

Length

4.5–5.5 m (14.8–18.0 ft)

Height

1.8–2.1 m (5.9–6.9 ft)

Estimated Mass

1.5–2.0 metric tons (3,307–4,409 lbs)

Diet & Feeding Ecology

All Herbivore Species

Trophic Guild: Herbivore

Tough coastal shrubs, palms, and cycads sliced with shearing dental batteries.

Paleobiology & Behavior

Basal centrosaurine herbivore with long, curved brow horns and elaborate spike-like parietal frill projections. Inhabiting the Wahweap Formation of Utah, Diabloceratops represents an early evolutionary ancestor to later Campanian horned giants such as Centrosaurus and Styracosaurus.

Habitat & Ecological Biome

Prehistoric Depositional Setting

Lush coastal plain floodplains with oxbow lakes, braided rivers, and peat swamps.

Fossil Evidence & Specimen Records

Preserved Skeletal Material & Bonebeds

Nearly complete articulated skull with intact horn cores and lower jaws (UMNH VP 16699).

Discovery & Taxonomic Naming History

Year of Discovery / Description2002

Type Specimen Locality & FormationWahweap Formation, Kane County, Utah, United States

Discovered by Donald DeBlieux; described by Jim Kirkland and DeBlieux in 2010.

Geological Era & Chronostratigraphy

Explore All Cretaceous Period Fauna

Cretaceous Period PeriodTemporal Interval: 81–79 Ma (million years ago)

The longest and final period of the Mesozoic Era, characterized by the rise of flowering plants, ceratopsians, hadrosaurs, tyrannosaurids, and concluding with the Chicxulub asteroid impact.

Where It Lived & Paleoenvironment

North America Dinosaurs

During the Mesozoic Era, continental drift progressively reconfigured land bridges, atmospheric currents, and regional precipitation regimes. Fossils of Diabloceratops evidence its adaptation to the paleoenvironments of North America.

Paleogeographic RealmNorth America (North America)

Home to the fossil-rich Morrison Formation of the Late Jurassic and the Hell Creek and Dinosaur Park Formations of the Late Cretaceous.

Fossil Discovery Locality

Scientific Significance & Evolutionary Impact

The anatomical architecture of Diabloceratops serves as a crucial benchmark in vertebrate paleontology, illustrating key adaptive radiations within Ceratopsia.

Phylogenetic Placement: Informs cladistic debates concerning the divergence, skull biomechanics, and skeletal evolution of Cretaceous Period fauna.
Paleoecological Guild: Documents trophic specialization (Herbivore) and predator-prey dynamics across its regional ecosystem.
Taphonomic Record: Nearly complete articulated skull with intact horn cores and lower jaws (UMNH VP 16699).

Frequently Asked Questions About Diabloceratops

Scientifically verified answers based on peer-reviewed paleontological evidence.

Q1.When did Diabloceratops live?

Diabloceratops lived during the Cretaceous Period Period, approximately 81–79 Ma (million years ago). This places it within the Mesozoic Era.

Q2.How big was Diabloceratops?

Paleontological estimates place Diabloceratops at a length of 4.5–5.5 m (14.8–18.0 ft), a hip/standing height of 1.8–2.1 m (5.9–6.9 ft), and a body mass of 1.5–2.0 metric tons (3,307–4,409 lbs).

Q3.What was the diet of Diabloceratops?

Classified as a herbivore, Diabloceratops specialized in consuming Tough coastal shrubs, palms, and cycads sliced with shearing dental batteries..

Q4.Where were Diabloceratops fossils discovered?

Fossil specimens of Diabloceratops have been recovered from Wahweap Formation, Kane County, Utah, United States, with notable historic specimens documented in 2002. Discovered by Donald DeBlieux; described by Jim Kirkland and DeBlieux in 2010.

Academic Literature & Peer-Reviewed References

Authoritative citations establishing the factual taxonomy, biometrics, and anatomy of Diabloceratops.

New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian SymposiumView Publication
Kirkland, J. I., & DeBlieux, D. D. (2010). New basal centrosaurine ceratopsian skulls from the Wahweap Formation (Middle Campanian), Grand Staircase-Escalante National Monument, southern Utah. New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium, 117-140.
Curated & Verified: 2026-09-24

Diabloceratops

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