English: Comparative line drawings highlighting major areas of cranial ornamentation in Akainacephalus johnsoni and closely related Laramidian and Asian taxa. Akainacephalus johnsoni (UMNH VP 20202) in (A), dorsal; (B), left lateral view compared to Nodocephalosaurus kirtlandensis (SMP VP-900) in (C), dorsal; and (D) left lateral view; Tarchia teresae (PIN 3142/250) in (E) dorsal; (F), left lateral view and Minotaurasaurus ramachandrani (INBR 21004) in (G), dorsal; and (H), left lateral view. Study sites: acc po, accessory postorbital ossification; asob, anterior supraorbital boss; frca, frontal caputegulum; laca, lacrimal caputegulum; loca, loreal caputegulum; mso, medial supraorbital; mx, maxilla; n, external naris; naca, nasal caputegulae; nuca, nuchal caputegulae; orb, orbital; pmx, premxilla; pnca, postnarial caputegulum; pos postocular ossicles; prfca, prefrontal caputegulum; psob, posterior supraorbital boss; pt, pterygoid; q, quadrate; qjh, quadratojugal horn; snca, supranarial caputegulum; sqh, squamosal horn. Color scheme after Arbour & Currie (2013a). Dorsal view of N. kirtlandensis modified after Arbour et al. (2014). T. teresea (=Saichania chulsanensis in Arbour, Currie & Badamgarav, 2014) and M. ramachandrani modified after Arbour, Currie & Badamgarav (2014).