Homalocephale, meaning “even head”, is a genus of dinosaur from the Late Cretaceous Period. It lived in what is now Mongolia, more than 80 million years ago. It was described in 1974 and consists of a single species. The type species is H. calathocercos.
This 10 foot long herbivore had a flat, wedge-shaped skull, hence its name. The reason for the thick flat skull is believed to be for males that competed in head-butting rituals, similar to that of modern-day iguanas. The pelvis is broad, which suggests the wide hips were for giving birth to live young. The wide hips may have also been there to protect vital organs from harm during flank-butting. It also had long legs, which indicates a fast-moving stride.