| testing nested phylogenetic and phylogeographic hypotheses in the plethodon vandykei species group. | mesic forests in the north american pacific northwest occur in two disjunct areas: along the coastal and cascade ranges of oregon, washington, and british columbia as well as the northern rocky mountains of idaho, montana, and british columbia. over 150 species or species complexes have disjunct populations in each area, and a priori hypotheses based on phytogeography and geology potentially explain the disjunction via either dispersal or vicariance. here, we test these hypotheses in the disjunc ... | 2004 | 15545255 |