Cerapoda 

The Cerapoda were the main herbivores of the Cretaceous. The first Cerapods evolved in the early Jurassic. They didn't start getting bigger until the late Jurassic. They evolved to lengths of 15m (50ft) in the late Cretaceous, and lived in herds of hundreds of animals. 

Information

Range

Everywhere from Alaska in the United States to Australia. Most Cerapods lived in either Asia or North america.

Size

Most Cerapods were a little bigger than a horse, with a long, deep tail. The smallest Cerapods were about 1m (3ft) in length, while the largest were 15m (50ft). Ceratopsians were shorter, 9m (30ft) at the largest. They were more heavily built than other Ceraopods. 

Habits

All Cerapods were plant eaters. Later Cerapods could chew better than almost any animal, living or dead. This may have helped them attain dominance.

Classification 

Suborder Cerapoda

     Stormbergia

     Agilisaurus

     Hexinlusaurus

     Infraorder Ornithopoda

          Family Hypsilophodontidae*

               Othnielia

          Family Hadrosauridae - (duck-billed dinosaurs)

          Family Heterodontosauridae

     Infraorder Pachycephalosauria

     Infraorder Ceratopsia - (horned dinosaurs)

          Protoceratops