| A (4 species) |
| Agathaumas - Late Cretaceous, 66 Ma |
| Agujaceratops - Late Cretaceous, 77 Ma |
| Anchiceratops - Late Cretaceous, 72-71 Ma |
| Arrhinoceratops - Early Maastrichtian, 70.6-70 Ma |
| B (0 species) |
| C (2 species) |
| Chasmosaurus - Late Cretaceous, 76.5-75.5 Ma |
| Coahuilaceratops - Late Cretaceous, 72.5-71.4 Ma |
| D (0 species) |
| E (1 species) |
| 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 (1 species) |
| Kosmoceratops - Late Cretaceous, 76.4-75.9 Ma |
| L (0 species) |
| M (2 species) |
| Medusaceratops - Middle Campanian, 77.5 Ma |
| Mojoceratops - Late Cretaceous, 76.5-75 Ma |
| N (0 species) |
| O (1 species) |
| Ojoceratops - Late Cretaceous, 68 Ma |
| P (1 species) |
| Pentaceratops - Late Cretaceous, 75.79-73 Ma |
| Q (0 species) |
| R (1 species) |
| Regaliceratops - Late Cretaceous, 68.5-67.5 Ma |
| S (0 species) |
| 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 (0 species) |
| X (0 species) |
| Y (0 species) |
| Z (0 species) |