Ornithischians
by John T.
Animals that evolved this trait evolved a backward protrusion of their pubis bone. This allowed them to evolve a larger stomach so as they could digest vegetation better. Vegetation has many vitamins and other good nutrients in it. Being able to get more nutrients was a good thing. Three animals who are examples of evolving this trait are the corythosaurus, the stegosaurus, and the saurolophus.
Last updated April 7, 2007.