Perchoerus, peccary skull Spinosaurus and in an posterior part

and in an posterior part even higher and decreasing towards the caudal fin

and brittle stars

The original skull is in the collections of the Denver Museum of Natural History and is specimen number 1663

Ornithomimus(pronounced or-NITH-oh-MIME-us) Ornithomimus (meaning "bird mimic") was an ostrich-like Ornithomimidae

Perchoerus, peccary skull Spinosaurus and in an posterior partPerchoerus is one of the rarest of the mammal fossils found in the White River Badlands and is much rarer than the cats and nimravids from the same area. They bear a strong resemblance to pigs, but pigs are from a separate family (the Suidae). They are the result of convergent evolution to pigs. During the convergent evolution, they occupied similar ecological niches and both were omnivorous rooters. The fossil record places peccaries in the Upper to