Yinlong
Stenopelix
Wannanosaurus
Goyocephale
Homalocephale
Colepiocephale
S_novomexicanum
Stegoceras_validum
Hanssuesia
Prenocephale_prenes
Tylocephale
Pachycephalosaurus
Dracorex_plus_Sandy_Site_pachy
Stygimoloch
Amtocephale
P_goodwini
P_edmontonensis
P_brevis