| A (7 species) |
| Achelousaurus - Late Cretaceous, 74.2 Ma |
| Agathaumas - Late Cretaceous, 66 Ma |
| Agujaceratops - Late Cretaceous, 77 Ma |
| Albertaceratops - Late Cretaceous, 77.5 Ma |
| Anchiceratops - Late Cretaceous, 72-71 Ma |
| Arrhinoceratops - Early Maastrichtian, 70.6-70 Ma |
| Avaceratops - Late Cretaceous, 77 Ma |
| B (1 species) |
| Brachyceratops - Late Cretaceous, 74.5 Ma |
| C (3 species) |
| Centrosaurus - Late Cretaceous, 76.5-75.5 Ma |
| Chasmosaurus - Late Cretaceous, 76.5-75.5 Ma |
| Coahuilaceratops - Late Cretaceous, 72.5-71.4 Ma |
| D (1 species) |
| Diabloceratops - Late Cretaceous, 79.9 Ma |
| E (2 species) |
| Einiosaurus - Upper Cretaceous, 74.5-74 Ma |
| Eotriceratops - Late Cretaceous, 68-67.6 Ma |
| F (0 species) |
| G (0 species) |
| H (0 species) |
| I (0 species) |
| J (1 species) |
| Judiceratops - Late Cretaceous, 78-77.5 Ma |
| K (2 species) |
| Kosmoceratops - Late Cretaceous, 76.4-75.9 Ma |
| Kulceratops - Early Cretaceous, Albian |
| L (0 species) |
| M (4 species) |
| Magnirostris - Unavailable |
| Medusaceratops - Middle Campanian, 77.5 Ma |
| Mojoceratops - Late Cretaceous, 76.5-75 Ma |
| Monoclonius - Late Cretaceous, 77-74.8 Ma |
| N (2 species) |
| Nasutoceratops - Campanian, 75.9-75.5 Ma |
| Nedoceratops - Late Cretaceous, 67 Ma |
| O (1 species) |
| Ojoceratops - Late Cretaceous, 68 Ma |
| P (2 species) |
| Pachyrhinosaurus - 73.5-69 Ma |
| Pentaceratops - Late Cretaceous, 75.79-73 Ma |
| Q (0 species) |
| R (2 species) |
| Regaliceratops - Late Cretaceous, 68.5-67.5 Ma |
| 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 (4 species) |
| Tatankaceratops - Late Maastrichtian, 66 Ma |
| Titanoceratops - Late Cretaceous, 74.73-73.55 Ma |
| Torosaurus - Late Cretaceous, 68 Ma |
| Triceratops - Late Cretaceous, 68 Ma |
| U (1 species) |
| Utahceratops - Late Cretaceous, 76.4-75.5 Ma |
| V (1 species) |
| Vagaceratops - Late Cretaceous, 75 Ma |
| 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) |