Kentrosaurus.
Kentrosaurus was a small Stegosaurid from the Tendaguru beds. It is often thought to be a primitive Stegosaurid, but is actually an African relative of Stegosaurus. It had a row of plates similar to Stegosaurus, but the plates became thinner and thinner until they became spikes. It had two spikes on each side of the hip or shoulder. It's name meant spiky lizard.