#  New Publication - Phylogeny and taxonomy of the genera of Erysiphaceae, part 4: Erysiphe (the “Uncinula lineage”) 

 





September 11, 2023

 

 

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 HUH Research Fellow Michael Bradshaw continues his series on the phylogeny and taxonomy of various powdery mildews, focusing on North American specimens. In this latest issue of *Mycologia*, Bradshaw and colleagues take a closer look at the “Uncinula lineage” within *Erysiphe.* Sequences generated for this project will contribute to a future monograph of North American powdery mildews.

 **Abstract**: This is the fourth contribution within an ongoing series dedicated to the phylogeny and taxonomy of powdery mildews. This particular installment undertakes a comprehensive evaluation of a group previously referred to as the “Uncinula lineage” within *Erysiphe*. The genus *Erysiphe* is too large to be assessed in a single paper; thus, the treatment of *Erysiphe* is split into three parts, according to phylogenetic lineages. The first paper, presented here, discusses the most basal lineage of *Erysiphe* and its relationship to allied basal genera within tribe Erysipheae (i.e., *Brasiliomyces* and *Salmonomyces*). ITS+28S analyses are insufficient to resolve the basal assemblage of taxa within the Erysipheae. Therefore, phylogenetic multilocus examinations have been carried out to better understand the evolution of these taxa. The results of our analyses favor maintaining *Brasiliomyces, Bulbomicroidium*, and *Salmonomyces* as separate genera, at least for the interim, until further phylogenetic multilocus data are available for additional basal taxa within the Erysipheae. The current analyses also confirmed previous results that showed that the “Uncinula lineage” is not exclusively composed of *Erysiphe* species of sect. *Uncinula* but also includes some species that morphologically align with sect. *Erysiphe*, as well as species that had previously been assigned to *Californiomyces* and *Typhulochaeta*. Numerous sequences of *Erysiphe* species from the “Uncinula lineage” have been included in the present phylogenetic analyses and were confirmed by their position in well-supported species clades. Several species have been sequenced for the first time, including *Erysiphe clintonii, E. couchii, E. geniculata, E. macrospora*, and *E. parvula*. Ex-type sequences are provided for 16 taxa including *E. nothofagi, E. trinae*, and *E. variabilis*. Epitypes are designated and ex-epitype sequences are added for 18 taxa including *Erysiphe carpophila, E. densa*, and *U. geniculata* var. *carpinicola*. The new species *Erysiphe canariensis* is described, and the new names *E. hosagoudarii* and *E. pseudoprunastri* and the new combination *E. ampelopsidis* are introduced.

 Michael Bradshaw, Uwe Braun & Donald H. Pfister (2023) Phylogeny and taxonomy of the genera of Erysiphaceae, part 4: *Erysiphe* (the “Uncinula lineage”), Mycologia, DOI: [10.1080/00275514.2023.2230853](https://doi.org/10.1080/00275514.2023.2230853)



 

 

 



 

 

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