Which other deer shares the genus Odocoileus with O. virginianus?
Answer
Mule Deer (Odocoileus hemionus)
The genus *Odocoileus* specifically encompasses the Whitetail Deer, *Odocoileus virginianus*, and its close relative, the Mule Deer, *Odocoileus hemionus*. Sharing the same genus indicates that these two widespread North American deer types have a very recent common evolutionary ancestor compared to other members of the broader Cervidae family, such as Elk or Moose. While they exhibit distinct differences in physical features, such as ear size and gait, and occupy slightly different habitat preferences, their placement within *Odocoileus* confirms a strong genetic and evolutionary linkage. This close relationship is important for researchers studying divergence within North American cervids.

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