Fig 1.

Phylogeny of the mitochondrial cytochrome b gene from several mammalian species. This maximum likelihood tree shows that North American bats of the family Vespertilionidae are more closely related to themselves than to other bat or common mammalian species. EpFu, big brown bat; PeSu, tricolored bat; MyLu, little brown myotis; MyLe, eastern small-footed myotis; MySe, northern long-eared myotis. The scale bar represents nucleotide substitutions. Only nodes with bootstrap support above 70% are labeled.