出典:Wikipedia
出典:『Wikipedia』 (2011/05/12 06:33 UTC 版)
The biological subfamily Bovinae includes a diverse group of 10 genera of medium to large sized ungulates, including domestic cattle, the bison, African buffalo, the water buffalo, the yak, and the four-horned and spiral-horned antelopes. The evolutionary relationship between the members of the group is obscure, and their classification into loose tribes rather than formal sub-groups reflects this uncertainty. General characteristics include cloven hoofs and usually at least one of the sexes of a species having true horns.