Equine

Equine is the collective name for species of the genus Equus, including horses, donkeys, zebras and their various hybrids. A famous now extinct species was the quagga.

Systematics
'Equus' is the only surviving genus of the family Equidae, one of the families of the order Perissodactyla, part of the superorder Ungulate. The close relation between the species allows for interbreeding, the result of which are mules and zorses, for example. These are usually sterile.