Greek for "Horned Faces", a suborder of dinosaurs that date back to the [Cretaceous] period.

Ceratopsia's Place in Superorder [Dinosauria]

Ornithischia
- Cerapoda
  - Marginocephalia
    - Ceratopsia

What this amounts to is that Ceratopsia were "Bird-hipped" ([Ornithischia], as opposed to Lizard-hipped [Saurischia]), with thick [enamel] on their teeth ([Cerapoda]), and Frilly Heads ([Marginocephalia]). The frills on their heads might have served as heat radiators; in the case of later [Tricerotops] they were most likely used for defense. Their beak and rows of grinding teeth suggests a diet of vegetation. The teeth would wear unevenly, creating serrated edges for shearing through plant material.

Early versions of this group, such as [Psittacosauridae] were smaller and walked on two legs; their remains are found in [Asia]. Later versions, such as the Triceratops, were large and quadrepedal, and can be found in [North America].

Sources

http://en.wikipedia.org/wiki/Ceratopsia

http://www.palaeos.com/Vertebrates/Units/320Ornithischia/800.html

http://www.ucmp.berkeley.edu/diapsids/ornithischia/ceratopsia.html

http://www.experiencefestival.com/ceratopsiahttp://www.nature.com/nature/journal/v416/n6878/full/416314a.html

Ceratopsia (thing)