Cerapoda

Cerapods are a suborder of the bird-hipped dinosaurs (Ornithischia) that have a hip bone configuration similar to those of modern birds. They are divided into three main groups: the Ornithopods ("bird-foot"), the Pachycephalosaurs ("thick-headed lizards") and the Ceratops ("horned-face").

Families
Infraorder: Ceratopsia
 * Ceratopsidae (horned dinosaurs)
 * Chaoyangsauridae
 * Psittacosauridae
 * Neoceratopsia

Infraorder: Ornithopoda (bird-footed)
 * Hypsilophodontidae
 * Iguanodontidae
 * Hadrosauridae (duck-billed dinosaurs)

Infraorder: Pachycephalosauria
 * Pachycephalosauridae
 * Goyocephala

Infraorder: Unranked
 * Heterodontosauridae
 * Agilisaurus
 * Hexinlusaurus
 * Stormbergia