Ceratopsians first appeared during the late Jurassic period and survived until the end of the Cretaceous period. At the end of the Cretaceous. about 65 million years ago, the last Ceratopsians, along with all the other remaining non-avian dinosaurs, died out during a mass extinction.
The Ceratopsia infraorder, together with the infraorders of Pachycephalosauria ("thick-headed lizards") and Ornithopoda ("bird feet"), form the the suborder Cerapoda of the Ornithischian dinosaurs. Ceratopsians are sometimes grouped together with Pachycephalosaurs as the Marginocephalia ("fringed heads"), since the these two infraorders share some common features and appear to be related.
The skull of Ceratopsians is the most common part of the animal to be preserved as a fossil (in contrast to other dinosaurs, where the skulls are often not found). Indeed, a number of species of Ceratopsians are known only from their skulls.
Ceratopsian Dinosaur Timeline:
Ceratopsian dinosaurs first appeared during the late Jurassic, about 156 million years ago, and survived until the end of the Cretaceous period, about 65 million years ago
Types of Ceratopsian Dinosaur
Here is a list of some Ceratopsian dinosaurs:
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