What makes Styracosaurus scientifically significant?

Styracosaurus provides critical insights into the evolutionary radiation of Ceratopsia. Holotypes and fossil evidence indicate: Holotype CMN 344 consists of a nearly complete skull; multiple partial skeletons recovered from mass mortality bonebeds.

Styracosaurus (Styracosaurus albertensis Lambe, 1913) - Size, Diet & Cretaceous Period Facts

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Styracosaurus (Styracosaurus albertensis Lambe, 1913) - Size, Diet & Cretaceous Period Facts | DinoOrigin

Evolutionary Taxonomy & Cladistics

View Dinosaur Phylogeny

Phylogenetic classification of Styracosaurus albertensis Lambe, 1913 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	Styracosaurus	Monophyletic prehistoric clade
Species	Styracosaurus albertensis Lambe, 1913	Specific authority designation

Anatomy & Physical Characteristics

Styracosaurus albertensis was a spectacularly adorned ceratopsian from the Dinosaur Park Formation of Alberta. Its distinguishing feature was its elaborate cranial armature: a single straight nasal horn measuring up to 60 centimeters in length and 4 to 6 long spikes protruding radially from the upper margin of the parietosquamosal neck frill.

Bonebed deposits containing multiple individuals demonstrate that Styracosaurus lived in cohesive herds that traveled across river valleys, where flash floods occasionally preserved dozens of individuals simultaneously.

Diagnostic Morphological Traits

Stout quadrupedal ceratopsian with a massive nasal horn, small brow hornlets, and an expansive frill crowned with long, outward-radiating spikes.

Comparative Scale & Biometrics

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

Approx. 3.2× human length

Styracosaurus (Length)5–5.8 m (16.4–19.0 ft)

Adult Human1.8 m (6.0 ft)

Length

5–5.8 m (16.4–19.0 ft)

Height

1.8–2.2 m (5.9–7.2 ft)

Estimated Mass

2.5–3.2 metric tons (5,512–7,055 lbs)

Diet & Feeding Ecology

All Herbivore Species

Trophic Guild: Herbivore

Tough, fibrous plants such as palms, cycads, and ferns clipped by a sharp keratinous beak and shredded by dental batteries.

Paleobiology & Behavior

Prominently spiked centrosaurine ceratopsian possessing an impressive frill adorned with long horns and spikes. In the Dinosaur Park Formation, Styracosaurus lived sympatrically with closely related horned dinosaurs like Centrosaurus and crested hadrosaurs like Corythosaurus.

Habitat & Ecological Biome

Prehistoric Depositional Setting

Lowland river delta forests and marshes bordering the Western Interior Seaway.

Fossil Evidence & Specimen Records

Preserved Skeletal Material & Bonebeds

Holotype CMN 344 consists of a nearly complete skull; multiple partial skeletons recovered from mass mortality bonebeds.

Discovery & Taxonomic Naming History

Year of Discovery / Description1913

Type Specimen Locality & FormationRed Deer River, Alberta, Canada

Discovered by Charles M. Sternberg; described by Lawrence Lambe in 1913.

Geological Era & Chronostratigraphy

Explore All Cretaceous Period Fauna

Cretaceous Period PeriodTemporal Interval: 75.5–75 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 Styracosaurus 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 Styracosaurus 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: Holotype CMN 344 consists of a nearly complete skull; multiple partial skeletons recovered from mass mortality bonebeds.

Frequently Asked Questions About Styracosaurus

Scientifically verified answers based on peer-reviewed paleontological evidence.

Q1.When did Styracosaurus live?

Styracosaurus lived during the Cretaceous Period Period, approximately 75.5–75 Ma (million years ago). This places it within the Mesozoic Era.

Q2.How big was Styracosaurus?

Paleontological estimates place Styracosaurus at a length of 5–5.8 m (16.4–19.0 ft), a hip/standing height of 1.8–2.2 m (5.9–7.2 ft), and a body mass of 2.5–3.2 metric tons (5,512–7,055 lbs).

Q3.What was the diet of Styracosaurus?

Classified as a herbivore, Styracosaurus specialized in consuming Tough, fibrous plants such as palms, cycads, and ferns clipped by a sharp keratinous beak and shredded by dental batteries..

Q4.Where were Styracosaurus fossils discovered?

Fossil specimens of Styracosaurus have been recovered from Red Deer River, Alberta, Canada, with notable historic specimens documented in 1913. Discovered by Charles M. Sternberg; described by Lawrence Lambe in 1913.

Academic Literature & Peer-Reviewed References

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

The Ottawa NaturalistView Publication
Lambe, L. M. (1913). A new genus and species of Ceratopsia from the Belly River Formation of Alberta. The Ottawa Naturalist, 27(9), 109-116.
Curated & Verified: 2026-09-24

Styracosaurus

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