This model accompanies the Visible Interactive Pachycephalosaur website on the WitmerLab at Ohio University site: http://bit.ly/2ekqtpO. The specimen is the skull of the pachycephalosaurian dinosaur Stegoceras validum (UALVP 2), collected from the Dinosaur Park Formation of Alberta, Canada, and housed at the University of Alberta. Our team published on this specimen in 2014 in an article by Jason Bourke, Ruger Porter, Ryan Ridgely, Tyler Lyson, Emma Schachner, Phil Bell, and Lawrence Witmer (http://bit.ly/1p5x0Ip). This research was funded in part by U.S. National Science Foundation grants to Witmer and Ridgely.