After Marya´nska, 1990, and Horner & Goodwin, 2009
†Pachycephalosaurus Brown & Schlaikjer, 1943
Tylosteus Leidy, 1872
†Pachycephalosaurus sp.
†Pachycephalosaurus wyomingensis (Gilmore, 1931) Brown & Schlaikjer, 1943
Troödon wyomingensis Gilmore, 1931
Pachycephalosaurus wyomingensis (Gilmore, 1931); Brown & Schlaikjer, 1943
Pachycephalosaurus wyomingensis (Gilmore, 1931); Marya´nska, 1990
Pachycephalosaurus wyomingensis (Gilmore, 1931);Horner & Goodwin, 2009
including:
Tylosteus ornatus Leidy, 1872
Pachycephalosaurus grangeri Brown & Schlaikjer, 1943
Pachycephalosaurus reinheimeri Brown & Schlaikjer, 1943
Stygimoloch spinifer Galton & Sues, 1983; Horner & Goodwin, 2009
Stenotholus kohleri Giffin, Gabriel & Johnson, 1987
Dracorex hogwartsia Bakker, Sullivan, Porter, Larson & Saulsbury, 2006; Horner & Goodwin, 2009
Reference(s):
- Horner, J. R. & Goodwin, M. B., 2009: Extreme cranial ontogeny in the Upper Cretaceous dinosaur Pachycephalosaurus.
–Plos One: Vol. 4, #10, pp. e7626(1-11) [doi: 10.1371/journal.pone.0007626] - Marya´nska, T., 1990: Pachycephalosauria. 564-577
in Weishampel, D. B., Dodson, P., & Osmólska, H. (eds.), 1990: The Dinosauria.
–University of California Press, Berkley, Los Angeles, Oxford, 1990 xvi-733