| phylogeography of the dusky shrew, sorex monticolus (insectivora, soricidae): insight into deep and shallow history in northwestern north america. | phylogenetic relationships among the dusky shrew (sorexmonticolus) and eight related species (s. bairdi, s. bendirii, s. neomexicanus, s.ornatus, s. pacificus, s. palustris, s. sonomae and s.vagrans) were assessed using sequences from the mitochondrial cytochrome b gene (801 bp). analyses using parsimony and maximum likelihood revealed significant molecular variation not reflected in previous morphological studies of these species. conversely, three morphologically defined species (s.bairdi, s.n ... | 2001 | 11380879 |