Concise hierarchy
(Kingdom) Animalia - (Phylum) Chordata - (Class) Reptilia - (Order) Ornithischia
Original entries
Subsequent entries
Current position
Alternative positions
Historical positions
| †Pachycephalosauria (Order) Maryañska & Osmólska, 1974 |
Ref:
R.M. Sullivan, 2006: 349-351; 347.
|
| †Pachycephalosauria (Suborder) Maryañska & Osmólska, 1974 |
Ref:
D. Lambert & the Diagram Group, 1991(1997): 109.
|
| †Ornithopoda (Suborder) Marsh, 1871 |
Ref:
P. Uetz, [1995-]1996: 30 Dec 1996.
|
| †Pachycephalosauria (Suborder) Maryañska & Osmólska, 1974 |
Ref:
R.L. Carroll, 1988: 622.
|
| †Ornithopoda (Suborder) Marsh, 1871 |
Ref:
B. Grzimek et al., 1973 (1971): 596.
|
Number of Subtaxa