Huayangosaurus
Like other stegosaurians, Huayangosaurus was a quadrupedal herbivore with a small skull and a spiked tail. Huayangosaurus had the distinctive double row of plates of all stegosaurians. These plates rose vertically along its arched back. In Huayangosaurus, the plates were more spike-like than in Stegosaurus. Like Stegosaurus it had two pairs of long spikes extending horizontally near the end of its tail.