THE CREATURES OF PRIMEVAL - Dracorex is a dinosaur from the late Cretaceous era of North America. Only a skull and a few vertebrae have ever been found and named Dracorex hogwartsia, meaning "dragon king of Hogwarts." They were discovered in the Hell Creek Formation in South Dakota. It belongs to the larger group of herbivorous or omnivorous Pachycephalosauridae, which are known for their thickened, domed skulls. There is much debate about why they had ornate skulls; one theory is that they used them to head-butt each other during mating rituals.
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