Ceratopsia

Ceratopsia is a clade of herbivorous ornithischian dinosaurs with beaked jaws. Many members also had facial horns and a bony neck frill.

Ornithischia: One of the two major dinosaur lineages, comprising herbivorous dinosaurs with a backward-pointing pubis. Ceratopsia is one branch of this major dinosaur lineage.
Triceratops: A large, late Cretaceous ceratopsian dinosaur with three prominent facial horns and a broad frill. It is a well-known example of a large, horned ceratopsian.
Ceratopsian dental battery: A tightly packed arrangement of ceratopsian teeth that formed cutting surfaces for processing vegetation. Replacement teeth maintained effective plant-processing surfaces as older teeth wore down.
Ceratopsian evolution: The evolutionary history and diversification of the dinosaur clade Ceratopsia. It traces the transition from small early members to diverse later lineages.
Sexual selection: Evolutionary change driven by differences in mating success among individuals. It is one proposed explanation for the diversity and display value of ceratopsian skull ornaments.
Dinosauria: The clade of reptiles that includes birds and their extinct non-avian relatives. Ceratopsians belong to the dinosaur lineage that includes living birds.
Protoceratops: A small, horned ceratopsian dinosaur from Late Cretaceous Mongolia. Its fossils document a compact, horned form without the enormous horns of later relatives.
Ceratopsian jaw mechanics: The structure and motion of ceratopsian jaws during biting and chewing. Jaw form and tooth arrangement shaped how these dinosaurs cropped and processed plants.
Ceratopsidae: The family of large, derived ceratopsians that includes Triceratops and Centrosaurus. This family contains the best-known elaborately horned ceratopsians.
Species recognition: The ability of organisms to identify members of their own species. Distinctive skull ornaments may have helped ceratopsians distinguish species.

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