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@ARTICLE{TreeBASE2Ref29992, author = {Michael Bradshaw}, title = {Phylogeny and taxonomy of powdery mildew on Viburnum species}, year = {2019}, keywords = {powdery mildew, viburnum, erysiphe}, doi = {}, url = {http://}, pmid = {}, journal = {Mycologia}, volume = {}, number = {}, pages = {}, abstract = {The phylogeny and taxonomy of powdery mildew on Viburnum species is evaluated and discussed. Morphological and phylogenetic analyses revealed two new species and demonstrated that Erysiphe hedwigii and E. viburni should be reduced to synonymy and are referred to herein as E. viburni. The two new species, E. viburniphila and E. awabuki, previously hidden under E. viburni (incl. E. hedwigii), is described on the basis of European, North American, and Korean powdery mildew collections on Viburnum edule, V. tinus and V. odoratissimum var. awabuki. The sexual morph of E. viburniphila is similar to E. viburni, however, morphological differences exist in their asexual morphs. Analyses of sequences from the ITS and 28S genomic region of powdery mildew obtained on Viburnum species (and other closely allied Eryisphe species) throughout the world reveled that E. viburniphila and E. awabuki are in two different monophyletic groups that are separate to all other Erysiphe species. Erysiphe hedwigii and E. viburni on Viburnum species have often been recognized as separate species based on morphological differences in the size of their chasmothecia and number of chasmothecial appendages. Taxonomic conclusions based on these morphological distinctions within these species are immature (these characters are rather variable, and often have overlapping ranges). The present phylogenetic analyses suggest that E. hedwigii has to be reduced to synonymy with E. viburni. To fix the application of the species names E. hedwigii and E. viburni, epitypes have been designated for these taxa with ex-epitype sequences. Additionally, the Asian species E. miranda is phylogenetically confirmed as species of its own, described in detail and discussed.} }