Most known brown rot-producing species of Polyporales belong to the so-called "Antrodia clade" that largely consists of poroid species. In this study, we use three genetic markers to revise Antrodia s. str., the core group of this clade. We show that a corticioid species with a smooth hymenophore, Phlebia griseoflavescens, belongs to Antrodia s. str. Accordingly, we revise the generic concept of Antrodia s. str. to accommodate this species and two recently described poroid taxa, A. tenerifensis and A. multiformis. In addition, we describe two new poroid species within Antrodia s. str., A. latebrosa from Africa and A. peregrina from East Asia, and provide new documentation for the Southeast Asian species A. parvula based on recent collections from the type location.

Beijing Advanced Innovation Center for Tree Breeding by Molecular Design Beijing Forestry University Beijing 100083 China

Biology Centre of the Academy of Sciences of the Czech Republic Branišovská 31 370 05 České Budějovice Czech Republic

Botanical Unit Finnish Museum of Natural History University of Helsinki P O Box 7 FI 00014 Helsinki Finland

Department of Botany Institute of Ecology and Earth Sciences University of Tartu Lai 40 EE 51015 Tartu Estonia

Natural History Museum University of Oslo P O Box 1172 NO 0318 Oslo Norway

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The genus Fomitopsis (Polyporales, Basidiomycota) reconsidered