| A (3 species) |
| Anchitherium - Miocene [1] |
| Ancylotherium - 6.5-1.8 Ma Late Miocene to Early Pleistocene |
| Astrohippus - 16.3-4.9 Ma Barstovian to Late Hemphillian[1] |
| B (0 species) |
| C (3 species) |
| Chalicotherium - Late Oligocene-Early Pliocene |
| Chilotherium - Late Miocene-Pliocene |
| Coelodonta - 3.7-0.01 Ma Pliocene - Pleistocene |
| D (1 species) |
| Dinohippus - Late Miocene-Late Pliocene |
| E (4 species) |
| Elasmotherium - Late Pliocene to Late Pleistocene, 2.588-0.029 Ma |
| Embolotherium - Late Eocene |
| 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 (6 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 |
| Hyrachyus - Eocene |
| Hyracodon - Middle Eocene-Late Oligocene |
| Hyracotherium - 55-45 Ma |
| I (1 species) |
| Iranotherium - Late Miocene |
| J (0 species) |
| K (1 species) |
| Kalimantsia - 23.03-5.33 Ma Miocene |
| L (0 species) |
| M (3 species) |
| Megacerops - Late Eocene 38-33.9 Ma |
| Merychippus - Miocene |
| Mesohippus - Middle Eocene - Early Oligocene |
| N (1 species) |
| Neohipparion - Unavailable |
| O (1 species) |
| Orohippus - early to middle Eocene[1] |
| P (4 species) |
| Palaeotherium - Early to Middle Eocene |
| Paraceratherium - Oligocene, 34-23 Ma |
| Parahippus - Early Miocene |
| Pliohippus - Mid Miocene |
| Q (0 species) |
| R (0 species) |
| S (1 species) |
| Sinotherium - Miocene-Pliocene |
| T (1 species) |
| Tylocephalonyx - 23.03-5.33 Ma Miocene |
| U (0 species) |
| V (1 species) |
| Victoriaceros - Middle Miocene, 15 Ma |
| W (0 species) |
| X (0 species) |
| Y (0 species) |
| Z (0 species) |