| molecular phylogeny and ecological diversification in a clade of new world songbirds (genus vireo). | we constructed a molecular phylogeny for a clade of eye-ringed vireos (vireo flavifrons and the v. solitarius complex) to examine existing hypotheses of speciation and ecological diversification. complete sequences of the mtdna cytochrome b gene were obtained from 47 individuals of this group plus four vireonid outgroups. mean levels of sequence divergence in the clade varied from 0.29% to 5.7%. differences were greatest between v. flavifrons and four taxa of 'v. solitarius'. the latter separate ... | 1998 | 9787446 |