| A (2 species) |
| Anchitherium - Miocene [1] |
| Astrohippus - 16.3-4.9 Ma Barstovian to Late Hemphillian[1] |
| B (0 species) |
| C (0 species) |
| D (1 species) |
| Dinohippus - Late Miocene-Late Pliocene |
| E (2 species) |
| Epihippus - 46.2-38.0 Ma Early Uintan to Duchesnean[1] |
| Equus simplicidens - Middle Pliocene to Late Pleistocene |
| F (0 species) |
| G (0 species) |
| H (3 species) |
| Hipparion - Early Miocene to Pleistocene,[1] 23-0.781 Ma |
| Hippidion - Pliocene-Late Pleistocene (Montehermosan-Lujanian & Blancan)~5.332-0.009 Ma |
| Hypohippus - Unavailable |
| I (0 species) |
| J (0 species) |
| K (0 species) |
| L (0 species) |
| M (2 species) |
| Merychippus - Miocene |
| Mesohippus - Middle Eocene - Early Oligocene |
| N (1 species) |
| Neohipparion - Unavailable |
| O (1 species) |
| Orohippus - early to middle Eocene[1] |
| P (2 species) |
| Parahippus - Early Miocene |
| Pliohippus - Mid Miocene |
| Q (0 species) |
| R (0 species) |
| S (0 species) |
| T (0 species) |
| U (0 species) |
| V (0 species) |
| W (0 species) |
| X (0 species) |
| Y (0 species) |
| Z (0 species) |