Taxonomic family name for the family of horses.

• (Kingdom) Animalia, (animals)
  • (Phylum) Chordata/Vertebrata, vertebrates (animals with spinal cords)
    • (Class) Mammalia, mammals
      • (Order) Perissodactyla, odd-toed ungulates
        • (Family) Equidae, horses
          • (Genus) Equus, Horse {Linnaeus, 1758}
            • Equus africanus, African Ass, ancestor of Domestic Ass, Equus asinus {Fitzinger, 1857}
              • Equus africanus africanus - CRITICALLY ENDANGERED
              • Equus africanus atlanticus {Thomas, 1884} - EXTINCT
              • Equus africanus somaliensis {Noack, 1884} - CRITICALLY ENDANGERED
            • Equus asinus, Domestic Ass {Linnaeus, 1758}
            • Equus burchelli, Zebra/Burchell's Zebra {Gray, 1823}
              • Equus burchelli antiquorum
              • Equus burchelli boehmi
              • Equus burchelli burchelli - EXTINCT SINCE 1930
              • Equus burchelli chapmani
              • Equus burchelli crawshayi - ENDANGERED?
              • Equus burchelli zambesiansis - EXTINCT?
            • Equus caballus, Domestic Horse {Linnaeus, 1758}
            • Equus ferus, Wild Horse {Boddaert, 1785}
              • Equus ferus ferus, Tarpan, ancestor of Domestic Horse, Equus caballus - EXTINCT
              • Equus ferus silvestris
              • Equus ferus przewalskii, Przewalski horse/Takhi - ENDANGERED
            • Equus grevyi, Zebra/Grevy's Zebra {Oustalet, 1882} - ENDANGERED
            • Equus hemionus, Kulan/Onager {Pallas, 1775}
              • Equus hemionus hemionus - ENDANGERED
              • Equus hemionus luteus {Matschie, 1911} - ENDANGERED
            • Equus kiang, Kiang {Moorcroft, 1841}
              • Equus kiang kiang
              • Equus kiang holderei {Matschie, 1911}
              • Equus kiang polyodon {Hodgson, 1847} - ENDANGERED?
            • Equus onager, Kulan/Onager {Boddaert, 1785}
              • Equus onager onager - ENDANGERED
              • Equus onager khur {Lesson, 1827} - ENDANGERED
              • Equus onager hemippus {Geoffroy, 1855} - EXTINCT
              • Equus onager kulan {Groves & Mazak, 1967}
            • Equus quagga, Quagga {Gmelin, 1788} - EXTINCT SINCE 1872
            • Equus zebra, Zebra/Selous' Zebra/Mountain Zebra {Linnaeus, 1758}
              • Equus zebra zebra - ENDANGERED
              • Equus zebra hartmannae - ENDANGERED

Remarks:

The taxonomic classification of zebras has been the subject of some discussion, with variant taxonomies listing the quagga (e. quagga) as a subspecies of e. burchelli.

Selected hybrid forms of Equidae:

• Hinny - Male horse (stallion) with female ass (jennie)
• Mule - Male ass (jackass) with female horse (filly)
• Zonkey/Zedonk/Zebrass - Male zebra with female ass
• Zorse - Male zebra with female horse

Hybrids are usually sterile, though rare exceptions do occur.