Bovids are a family of even-toed ungulate mammals. Even-toed ungulates are said to have "cloven hooves": that just means their hooves are formed from two toes.
There almost 140
species in this family. They include cattle, goats, sheep and antelopes. The family is widespread, living in continents except South America, Australia and Antarctica.
They are all
ruminants, with the double stomach system of digesting vegetation, which is most efficient. The family originated in the Miocene, and is now very successful. Their success, and that of the three domestic animals (cow, sheep and goat) is probably helped by their digestive system.
Subfamily Aepycerotinae (one genus: the
impala) Subfamily Alcelaphinae (one tribe and four genera:
wildebeest and relatives) Subfamily Antilopinae (three tribes and 15 genera:
gazelles and relatives) Subfamily
Bovinae (three tribes and ten genera: cattle, bisons etc.) Subfamily
Caprinae (three tribes and 13 genera: goats and sheep) Subfamily Cephalophinae (three genera:
duikers) Subfamily Hippotraginae (three genera:
antelopes) Subfamily Panthelopinae (the
Tibetan antelope) Subfamily Peleinae (the
grey rhebok) Subfamily Reduncinae (two genera: more antelopes)