Children (20 direct children, 40 direct and indirect children):
Pachycephalosaurus
(tree size 1)
Stygimoloch
(tree size 1)
Tylocephale
(tree size 1)
Alaskacephale
(tree size 1)
Goyocephale
Wannanosaurus
(tree size 1)
Sphaerotholus
Homalocephale
(tree size 1)
Stegoceras
Dracorex
(tree size 1)
Prenocephale
(tree size 1)
Stenopelix
(tree size 1)
Gravitholus
Colepiocephale
(tree size 1)
Ferganocephale
(tree size 1)
Ornatotholus
Pachycephalosauridae
(tree size 8)
Goyocephalia
(tree size 1)
Goyocephala
Sinocephale