Phylogeography and mitochondrial diversity of extirpated brown bear (Ursus arctos) populations in the contiguous United States and Mexico | Semantic Scholar
@article{Miller2006PhylogeographyAM,
title={Phylogeography and mitochondrial diversity of extirpated brown bear (Ursus arctos) populations in the contiguous United States and Mexico},
author={Craig R. Miller and Lisette P. Waits and Paul Joyce},
journal={Molecular Ecology},
year={2006},
volume={15},
url={https://api.semanticscholar.org/CorpusID:7336900}
}The data are consistent with recent genetic evidence that brown bears were south of the ice prior to the last glacial maximum, and there is no support for previous subspecies designations, although bears of the southwestern United States may have had a distinctive, but recent, pattern of ancestry.