| A (2 species) |
| Achelousaurus - Late Cretaceous, 74.2 Ma |
| Albertaceratops - Late Cretaceous, 77.5 Ma |
| B (1 species) |
| Brachyceratops - Late Cretaceous, 74.5 Ma |
| C (1 species) |
| Centrosaurus - Late Cretaceous, 76.5-75.5 Ma |
| D (1 species) |
| Diabloceratops - Late Cretaceous, 79.9 Ma |
| E (1 species) |
| Einiosaurus - Upper Cretaceous, 74.5-74 Ma |
| F (0 species) |
| G (0 species) |
| H (0 species) |
| I (0 species) |
| J (0 species) |
| K (0 species) |
| L (0 species) |
| M (1 species) |
| Monoclonius - Late Cretaceous, 77-74.8 Ma |
| N (1 species) |
| Nasutoceratops - Campanian, 75.9-75.5 Ma |
| O (0 species) |
| P (1 species) |
| Pachyrhinosaurus - 73.5-69 Ma |
| Q (0 species) |
| R (1 species) |
| Rubeosaurus - Late Cretaceous, 74.6 Ma |
| S (3 species) |
| Sinoceratops - Late Cretaceous, 72 Ma |
| Spinops - Late Cretaceous, 76.5 Ma |
| Styracosaurus - Late Cretaceous, 75.5-75 Ma |
| T (0 species) |
| U (0 species) |
| V (0 species) |
| W (1 species) |
| Wendiceratops - Late Cretaceous, 79-78.7 Ma |
| X (1 species) |
| Xenoceratops - Late Cretaceous, 79.5 Ma |
| Y (0 species) |
| Z (0 species) |