Triceratops

Triceratops was a large, herbivorous ceratopsian dinosaur genus from Late Cretaceous western North America, distinguished by three facial horns and a broad bony frill.

Ceratopsia: Ceratopsia is the dinosaur group that includes horned and frilled herbivores such as Triceratops. Triceratops belongs to this group of beaked, mostly plant-eating dinosaurs.
Triceratops horns: Triceratops had two long brow horns above the eyes and a shorter horn over the nose. These three horns define its familiar skull profile, though their exact functions remain debated.
Othniel Charles Marsh: Othniel Charles Marsh was an American paleontologist who named many fossil vertebrates, including Triceratops. Marsh established the genus in 1889 during the period of intense fossil collecting in the American West.
Triceratops horridus: Triceratops horridus is a species of Triceratops named from fossils found in the western United States. It is one of the two generally recognized species in the genus.
Styracosaurus: Styracosaurus was a horned ceratopsid dinosaur with a prominent nose horn and long frill spikes. Its spiked frill contrasts with Triceratops' broad, mostly smooth-edged frill.
Ceratopsidae: Ceratopsidae is a family of large, often horned ceratopsian dinosaurs from the Late Cretaceous. Triceratops is a member of this family, whose skulls bear elaborate horns and frills.
Dinosaur frill: A dinosaur frill is a bony extension of the skull roof found in several dinosaur groups. Triceratops' frill provided a large surface whose function may have included display or defense.
Bone Wars: The Bone Wars were a late nineteenth-century rivalry between paleontologists Othniel Charles Marsh and Edward Drinker Cope. The rivalry helped drive the fossil expeditions that brought Triceratops and other western dinosaurs to scientific attention.
Triceratops prorsus: Triceratops prorsus is a species of Triceratops known from Late Cretaceous North American fossils. Its skull differences from T. horridus help define variation within the genus.
Centrosaurus: Centrosaurus was a ceratopsid dinosaur with a large nose horn and a relatively short frill. Its prominent nose horn contrasts with Triceratops' two long brow horns.

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