Order †Pachycephalosauria Maryañska & Osmólska, 1974 see Infraorder Pachycephalosauria Maryañska & Osmólska, 1974 Family †Pachycephalosauridae Sternberg, 1945 Genus †Alaskacephale Sullivan, 2006 1 †Alaskacephale gangloffi Sullivan, 2006