Order †Pachycephalosauria Maryañska & Osmólska, 1974 see Infraorder Pachycephalosauria Maryañska & Osmólska, 1974 Family †Pachycephalosauridae Sternberg, 1945 Genus †Prenocephale Maryañska & Osmólska, 1974 †Prenocephale prenes T. Maryañska & H. Osmólska, 1974