Order †Pachycephalosauria Maryañska & Osmólska, 1974 see Infraorder Pachycephalosauria Maryañska & Osmólska, 1974 Family †Pachycephalosauridae Sternberg, 1945 Genus †[Goyocephale] Perle, Maryanska & Osmólska, 1982 1 ?†Goyocephale lattimorei A. Perle et al., 1982