Equidae is the family of horse-like animals, order Perissodactyla. It is sometimes known as the horse family. Apart from the horses, other extant equids include the donkey, the four zebras and the onager. All of these are in the genus Equus.

Classification

• ORDER PERISSODACTYLA
  • Family Equidae
    • Genus Equus
      • Subgenus Equus
        • Wild Horse, Equus ferus
          • Tarpan or Eurasian Wild Horse, Equus ferus ferus (extinct)
          • Przewalski's Horse or Mongolian Wild Horse, Equus ferus przewalskii
        • Domestic Horse, Equus caballus
        • Equus scotti (Prehistoric)
      • Subgenus Asinus
        • Donkey, Equus asinus
        • African Wild Ass, Equus africanus
          • Nubian Wild Ass, Equus africanus africanus
          • Somali Wild Ass, Equus africanus somalicus
        • Onager or Asiatic Ass, Equus hemionus
          • Mongolian Wild Ass, Equus hemionus hemionus
          • Syrian Wild Ass, Equus hemionus hemippus (extinct)
          • Gobi Kulan or Dziggetai , Equus hemionus luteus
          • Turkmenian Kulan, Equus hemionus kulan
          • Persian Onager, Equus hemionus onager
          • Indian Wild Ass or Khur, Equus hemionus khur
        • Kiang, Equus kiang
          • Western Kiang, Equus kiang kiang
          • Eastern Kiang, Equus kiang holdereri
          • Southern Kiang, Equus kiang polyodon
      • Subgenus Dolichohippus
        • Grevy's Zebra, Equus grevyi
      • Subgenus Hippotigris
        • Plains Zebra, Equus quagga
          • Quagga, Equus quagga quagga (extinct)
          • Burchell's Zebra, Equus quagga burchellii
          • Grant's Zebra, Equus quagga boehmi
          • Selous' zebra, Equus quagga borensis
          • Chapman's Zebra, Equus quagga chapmani
          • Crawshay's Zebra, Equus quagga crawshayi
        • Cape Mountain Zebra, Equus zebra
        • Hartmann's Mountain Zebra, Equus hartmannae
  • Family Tapiridae: tapirs, 4 species in one genus
  • Family Rhinocerotidae: rhinoceroses, 5 species in 4 genera

See also

• Evolution of the Horse
• Zebroid

References

• Duncan, P. (ed.). 1992. Zebras, Asses, and Horses: an Action Plan for the Conservation of Wild Equids. IUCN/SSC Equid Specialist Group. IUCN, Gland, Switzerland.
• Equid Specialist Group 1996. Equus ferus. In: IUCN 2004. 2004 IUCN Red List of Threatened Species. . Downloaded on 21 January 2006.
• Equid Specialist Group 1996. Equus ferus ssp. przewalskii. In: IUCN 2004. 2004 IUCN Red List of Threatened Species. . Downloaded on 21 January 2006.
• Groves, C.P. & Bell, H.B. 2004. New investigations on the taxonomy of the zebras genus Equus, subgenus Hippotigris. Mammalian Biology. 69: 182-196.
• Higuchi et al. 1987. Mitochondrial DNA of the Extinct Quagga: Relatedness and Extent of Postmortem Change. Journal of Molecular Evolution 25:283-287.
• International Commission on Zoological Nomenclature. 2003. Opinion 2027 (Case 3010). Usage of 17 specific names based on wild species which are pre-dated by or contemporary with those based on domestic animals (Lepidoptera, Osteichthyes, Mammalia): conserved. Bull.Zool.Nomencl., 60:81-84.
• Moelman, P.D. 2002. Equids. Zebras, Assess and Horses. Status Survey and Conservation Action Plan. IUCN/SSC Equid Specialist Group. IUCN, Gland, Switzerland. (http://www.iucn.org/themes/ssc/publications/actionplans.htm#Equids2002)

Equids

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