Horse
Besides the horse, there are six other species of genus "Equus" in the Equidae family. These are the ass or donkey, "Equus asinus"; the mountain zebra, "Equus zebra"; plains zebra, "Equus quagga"; Grévy's zebra, "Equus grevyi"; the kiang, "Equus kiang"; and the onager, "Equus hemionus".
Booidea
The Booidea, also known as booid snakes, are a superfamily of snakes that contains boas (family Boidae) and other closely related boa-like snakes (but not pythons, which are in a separate superfamily called Pythonoidea). As of 2017, Booidea contains 61 species, including the eponymous Neotropical "Boa constrictor", anacondas (genus "Eunectes"), and smaller tree and rainbow boas ("Corallus", "Epicrates", and "Chilabothrus") as well as several genera of booid snakes from various locations around the world: "Candoia" from New Guinea and Melanesia, sand boas ("Eryx") from northeast Africa, the Middle East, and southwestern Asia, "Charina" and "Lichanura" from North America, "Ungaliophis" and "Exiliboa" from Central America, "Acrantophis" and "Sanzinia" from Madagascar, and "Calabaria" from tropical west-central Africa.