| Dinosauria Owen, 1842 |
| Ornithischia Seeley, 1887 |
| Ornithopoda Marsh, 1881 |
| Iguanodontia Dollo, 1888 |
| Hadrosauridae Cope, 1870 |
| Saurolophinae Brown, 1914, sensu Prieto-Márquez, 2010 |
| Brachylophosaurini Gates et al., 2011 |
| Maiasaura peeblesorum Horner & Makela, 1979 |
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