From publisher blurb:
Play herbivorous humanoid dinosaurs.
Animal Races: Dawn of the Cerapod presents a new race of playable humanoids whose members resemble herbivorous dinosaurs. From agile Bird Feet and surly Bone-Heads to militant Horn-Heads and armor-plated Shield-Bearers, customizable racial traits and racial feats allow you to play a wide range of dinosaur-themed humanoids called cerapods.
Also included: a look at the cerapod race as it existed in ancient times and numerous suggestions for reviving that race in campaigns taking place after its apparent extinction. Worship the collective consciousness of an ancient empire. Visit an extraplanar menegerie designed by mysterious outsiders. Revive a dead race with powerful magic. The history of the cerapods has just begun.