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Encyclopedia > Bovidae


Bovids

American Bison
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Family: Bovidae
Subfamilies

Bovinae
Cephalophinae
Hippotraginae
Antilopinae
Caprinae

A bovid is any of almost 140 species of cloven-hoofed mammals belonging to the family Bovidae. The family is widespread, being native to all continents except Australia and Antarctica, and diverse: members include buffalo, bison, antelopes, gazelles, and both wild and domesticated cattle, sheep, goats, and water buffalo.


The largest bovids weigh well over a tonne and stand 2 metres high at the shoulder; the smallest weigh about 3 kg and stand no taller than a large domestic cat. Some are thick_set and muscular, others lightly built with small frames and long legs. Many species congregate into large groups with complex social structures, but others are mostly solitary. Within their extensive range, they occupy a wide variety of habitat types, from desert to tundra and from thick tropical forest to cliff-faces.


All members of the family are herbivorous and have a four-chambered stomach which allows most of them to digest foods that are too low in nutriment for many other animals, notably grasses. No animal is able to directly digest cellulose: like (for example) kangaroos and termites, bovids rely on stomach bacteria to break down cellulose by fermentation.


Because of the size and weight of their complex digestive systems, many bovids have a solid, stocky build; the more gracile members of the family tend to have more selective diets, and be browsers rather than grazers. Their canine teeth are either missing or else modified to act as extra incisors. All bovids have a two-toed hoof. All males (and many females) have horns; the size and shape varies greatly but the basic structure is always a single bony protrusion without branches and covered in a sheath of keratin.


The family is known through fossil records from the early Miocene. The largest number of modern bovids are found in Africa, with substantial but less diverse populations in Asia and North America. It is thought that many of the bovid species, which evolved in Asia, were unable to survive the sudden advent of a new and unfamiliar predator when humans first emerged from Africa in the late Pleistocene, the African species, on the other hand, had many thousands of years, perhaps a few millions, in which to gradually adapt to the equally gradual development of human hunting skills. It is notable that many of the commonly domesticated bovid species—goats, sheep, water buffalo, the Yak—are of Asian origin: it is believed that the Asian bovids had less fear of humans and were more docile.

The small number of modern American bovids are relatively recent arrivals over the Bering Land Bridge. All of the large grazing animals native to North America died out immediately after the arrival of the Clovis people about 12,000 years ago. This left a number of ecological niches vacant, and the ancestors of the modern American Bison, Mountain Goat and American Bighorn Sheep moved in to occupy them.

  • ORDER ARTIODACTYLA: even-toed ungulates
    • Suborder Ruminantia: ruminants
      • Family Tragulidae: chrevrotains, 6 species in 4 genera
      • Family Moschidae: musk deer, 4 species in one genus
      • Family Cervidae: deer, 43 species in 16 genera
      • Family Bovidae
        • Subfamily Bovinae: cattle and spiral-horned antelopes, 24 species in 9 genera
        • Subfamily Cephalophinae: duikers, 19 species in 2 genera
        • Subfamily Hippotraginae: grazing antelopes, 6 species in 5 genera
        • Subfamily Antilopinae: gazelles, dwarf antelopes and the saiga, 38 species in 14 genera
        • Subfamily Caprinae: sheep, goats, 26 species in 12 genera
        • Subfamily Reduncinae: reedbucks, lechwe, 8 species in 2 genera
        • Subfamily Aepycerotinae: impala, 1 species in 1 genus
        • Subfamily Paleinae: rhebok, 1 species in 1 genus
        • Subfamily Alcelaphinae: wildebeest, topi/tsessebe, 7 species in 4 genera
    • Suborder Suina: pigs and allies
    • Suborder Tylopoda: camels and llamas





  Results from FactBites:
 
Bovidae - Cattle, antelopes, and goats (590 words)
The Bovidae are the most diverse group of living ungulates with 143 Recent species (over 55% of modern ungulates).
The family Bovidae began its evolution in Africa around 19 million years ago, and rapidly diversified, with 78 genera known from the Miocene (compared to 50 today).
Kingdon (1997) suggests that a continental divide between Africa and Eurasia may be responsible for the early divergence of the Boodontia (Eurasian in origin) and the Aegodontia (which continued evolving in Africa).
Bovidae (723 words)
Gentry, A. Caprinae and Hippotragini (Bovidae, Mammalia) in the Upper Miocene.
Evolutionary affinities of the enigmatic saola (Pseudoryx nghetinhensis) in the context of the molecular phylogeny of Bovidae.
The tribal radiation of the family Bovidae (Artiodactyla) and the evolution of the mitochondrial cytochrome b gene.
  More results at FactBites »

 
 

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