- Equidae, family Equidae - horses; asses; zebras; extinct animals
--1 is a kind of mammal family
--1 is a member of Perissodactyla, order Perissodactyla
--1 has members:Equus, genus Equus; equine, equid; Hyracotherium, genus Hyracotherium; genus Mesohippus; genus Protohippus; mare, female horse