| phylogeographic analysis of mitochondrial gene flow and introgression in the salamander, plethodon shermani. | plethodon shermani comprises a series of geographically disjunct populations occupying high-elevation mountain isolates. these populations hybridize at their borders with salamanders of the plethodon glutinosus species complex, and past range expansions inferred from pleistocene climatic cycles may have increased the possible genetic interactions between p. shermani and species of the p. glutinosus complex. because mitochondrial dna haplotypes often show introgression across species borders, we ... | 2005 | 15813784 |