Skull Dome (IMAGE) Yale University Caption Texacephale langstoni had softball-sized lumps of bone on top of their skulls. Researchers found two of the fossilized domes in Big Bend National Park in southwest Texas. Credit Nicholas Longrich/Yale University Usage Restrictions With appropriate credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.