Class Mammalia Linnaeus, 1758 - mammals
Order Perissodactyla Owen, 1848 - odd-toed ungulates
Family Equidae Gray, 1821 - horses, zebras, and asses
Genus Equus Linnaeus, 1758 - horses, zebras, and asses
1 Equus asinus Linnaeus, 1758 - ass
2 Equus burchellii (Gray, 1824) - Burchell's zebra
3 Equus caballus Linnaeus, 1758 - horse
4 Equus grevyi Oustalet, 1882 - Grévy's zebra
5 Equus hemionus Pallas, 1775 - onager
6 Equus kiang Moorcroft, 1841 - kiang
7 Equus onager Boddaert, 1785 - onager
see Equus hemionus onager Boddaert, 1785
8 ‡Equus quagga Boddaert, 1785 - quagga
9 Equus zebra Linnaeus, 1758 - mountain zebra