Global Phylogeny and Taxonomy of the Wood-Decaying Fungal Genus Phlebiopsis (Polyporales, Basidiomycota)

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An in-depth study of the phylogeny and taxonomy of the corticioid genusPhlebiopsis(Phanerochaetaceae) was conducted. Phylogenetic analyses of the ITS1-5.8S-ITS2 and nrLSU sequences demonstrated thatPhlebiopsisis a strongly supported clade which is distinct from its sister clades ofPhaeophlebiopsis,Hapalopilus, andRhizochaete. Two genera,AustralohydnumandHjortstamia, are reduced to synonyms underPhlebiopsisas generic type speciesA. griseofuscescensandH. friesii, respectively, are embedded in thePhlebiopsisclade. Twenty-four lineages are resolved in the ITS phylogenetic tree ofPhlebiopsis, including six new taxa, viz.P. albescens,P. brunnea,P. cylindrospora,P. magnicystidiata,P. membranaceaandP. sinensis, from Sri Lanka and China. Five new combinations, viz.Phaeophlebiopsis mussooriensis,Phlebiopsis bambusicola,P. dregeana,P. griseofuscescensandP. novae-granatae, are proposed.Phlebiopsis crassais a morphological species complex with three distinct lineages.Phlebiopsis lamprocystidiatais determined to be a later synonym ofP. darjeelingensis. The new taxa are described, illustrated, and compared and contrasted to morphologically similar species. An emended description ofPhlebiopsisis provided along with an identification key to 27 accepted species.