Phylogeny and taxonomy of the genera of Erysiphaceae, part 7: Phyllactinieae.

The seventh part of this series devoted to the phylogeny and taxonomy of powdery mildews presents the phylogeny and taxonomy of species assigned to the genera , and (Erysiphaceae tribe Phyllactinieae). Phylogenetic trees based on multiple loci (ITS+28S, , IGS, , and ) are presented. All species with available sequence data are included. The present analyses aim at providing a reference for analyses of powdery mildews of tribe Phyllactinieae. A special focus is on the generic distinction at the base of tribe Phyllactinieae and between and . The inclusion of a larger number of phylogenetically basal spp. and multiple loci allowed a better insight into the phylogeny of tribe Phyllactinieae and confirmed that spp. are nested within the clade. As a consequence, is reduced to synonymy with . Additionally, was found to be nested within the clade, and as such we have reduced to synonymy with . Multiple species have been sequenced for the first time, in particular multiple North American species. , and are epitypified. The new species , sp. nov. , sp. nov. and , sp. nov. are described, and the new combinations (comb. et stat. nov.), , and are introduced. Furthermore, sect. , sect. nov. sect. , comb. et stat. nov. and sect. , comb. et stat. nov. are presented.