| The 
                    name for this order of mammals, ARTIODACTYLA designates the 
                    even-number of digits, which is a major feature of the families 
                    in this order, distinguishing them from the PERISSSODACTYLS 
                    (zebras, horses, asses). Most living artiodactyls are herviborous, 
                    the plants eaten ranging from lichens, in the Arctic tundra, 
                    to fruits and tubers in the forests. Most domestic animals 
                    are members of this order. The third and fourth digits are 
                    of about equal in size, the bulk of the animal's weight passing 
                    between the two. The second and fifth digits are reduced in 
                    size or are absent. The first digit is absent. Metatapodials 
                    of the third and fourth digits may be fused into the cannon 
                    bone . All digits terminate in hoofs. Cheek teeth occur in 
                    all families. Upper incisors are absent in Ruminants. Upper 
                    canines are frequently lost or reduced in size. The digestive 
                    tract varies in size and complexity, relating to the vegetable 
                    diet.   Artiodactyls 
                    are native to all parts of the world's land surface except 
                    Antartica, oceanic islands and the Australian region.  
                   
 Family 
                    Suidae  Family 
                    Camelidae  Family 
                    CervidaeSubfamily 
                    Capreolinae
 Family 
                    BovidaeSubfamily 
                    Bovinae
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