mammal genus - a genus of mammals

Equidae, family Equidae - horses; asses; zebras; extinct animals

Equus caballus, horse - solid-hoofed herbivorous quadruped domesticated since prehistoric times

ass - hardy and sure-footed animal smaller and with longer ears than the horse

domestic ass, donkey, Equus asinus - domestic beast of burden descended from the African wild ass; patient but stubborn

mule - sterile offspring of a male donkey and a female horse

hinny - sterile offspring of a male horse and a female donkey or ass

wild ass - any of several plain-colored equine mammals of Asia and northeast Africa

zebra - any of several fleet black-and-white striped African equines

Equus quagga, quagga - mammal of South Africa that resembled a zebra; extinct since late 19th century