| phylogeographic patterns in drosophila montana. | the drosophila virilis species group offers valuable opportunities for studying the roles of chromosomal re-arrangements and mating signals in speciation. the 13 species are divided into two subgroups, the montana and virilis 'phylads'. there is greater differentiation among species within the montana phylad in both karyotype and acoustic signals than exists among members of the virilis phylad. drosophila montana is a divergent species which is included in the montana phylad. here, we analyse th ... | 2007 | 17305862 |