Texacephale was, like other pachycephalosaurids, a small, bipedal herbivore. The thickened dome, formed by the fused frontals and parietals, with contributions from other bones of the skull, would have meant that the brain was covered by several inches of solid bone. The dome is likely to have been used in head-butting contests over mates and/or territory, similar to modern head-butting species such as bighorn sheep, cape buffalo, and musk oxen. Damage to the skull bone may have been sustained during combat.
