Sites

Camelidae Family - English
URL: http://animaldiversity.ummz.umich.edu/chordata/mammalia/artiodactyla/camelidae.h

There are two groups of living camels. One, found in northern Africa and central Asia, consists of the dromedary (one-humped camel) and bactrian camels (two-humped camel). Dromedaries and most bactrian camels exist today only in domestication. The other group, the South American camelids, includes 2 to 4 species. Llamas and alpacas, sometimes considered to be the same species, may both have been derived from the guanaco through a thousand years or more of domestication. Guanacos and vicugnas still exist in the wild, although wild populations of both are depleted and threatened.

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Systematics of the Artiodactyla - English
URL: http://www.ucmp.berkeley.edu/mammal/artio/artiosy.html

The systematic relationships of artiodactyls are still being worked out; many early fossil artiodactyls are not easy to place in standard classifications.

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