The Ceratopsia are the horned dinosaurs of the order Ornithischia. Triceratops is the best-known, and one of the largest. They are a group of herbivorous, beaked dinosaurs which thrived in what is now North America and Asia, during the Cretaceous period.
Later members, including Centrosaurus and Triceratops, became very large quadrupeds. They developed elaborate facial horns and a neck frill. The frill served mainly to protect the vulnerable neck from bipedal predators like Tyrannosaurus, who attacked from above.
Triceratops is by far the best-known ceratopsian to the general public.
- Dodson P. 1996. The horned dinosaurs. Princeton: Princeton University Press.