| DINOSAURIA Owen, 1842 |
| ORNITHISCHIA Seeley, 1887 |
| ORNITHOPODA Marsh, 1881 (sensu Butler, Upchurch & Norman, 2008) |
| ANKYLOPOLLEXIA Sereno, 1986 (sensu Sereno, 2005) |
| DAKOTADON Paul, 2008 |
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