Prenocephale was generally similar in form to one of its close relative, Pachycephalosaurus, but was considerably smaller in size. Like Pachycephalosaurus, it had a thick bony dome on its head with bony knobs and spikes. However, as compared to a number of other animals in this group, Prenocephale's dome was sloping, hence its name which means "sloped head".
Although some scientists have argued that perhaps Prenocephale was an omnivore, it is generally believed to have been a herbivore (plant-eater). Prenocephale probably ate leaves and fruit, and may have been quite selective in its foraging.
Only a limited number of fossils of Prenocephale have so far been found, most of which are skulls, although a few other bones have been found. Based on these, and comparison of its anatomy to its relatives, scientists believe that Prenocephale was about 8 feet (2.4 meters) long, and weighed something in the region of 290 pounds (130 kilograms).
Prenocephale was a herbivore (plant-eater) that lived from 83 to 65 million years ago
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