出典:Wikipedia
出典:『Wikipedia』 (2011/06/02 20:42 UTC 版)
Urocitellus is a genus of ground squirrels. They were previously believed to belong to the much larger genus Spermophilus, but DNA sequencing of the cytochrome b gene showed that this group was paraphyletic to the prairie dogs and marmots,, and could therefore no longer be retained as a single genus. As a result, Urocitellus is now considered as a genus in its own right.