Aleurodiscus bicornis and A . formosanus spp. nov. (Basidiomycota) with smooth basidiospores, and redescription of A . parvisporus

Three species of Aleurodiscus s.l. characterized in having effused basidiomata, clamped generative hyphae and quasi-binding hyphae, sulphuric positive reaction of gloeocystidia, hyphidia, acanthophyses, and smooth basidiospores are described. They are A . bicornis sp. nov., A . formosanus sp. nov., and A . parvisporus . Aleurodiscus bicornis was found from the high mountains of northwestern Yunnan Province of southwestern China, and grew on branches of Picea sp. Aleurodiscus formosanus was found from high mountains of central Taiwan, and grew on branches of gymnosperm. Aleurodiscus parvisporus was previously only reported once from Japan and once from Sichuan Province of China, and is reported in this study from Jilin Province of China. Phylogenetic relationships of these three species were inferred from analyses of a combined dataset consisting of three genetic markers, viz. 28S, nuc rDNA ITS1-5.8S-ITS2 (ITS), and a portion of the translation elongation factor 1-alpha gene, TEF1 . The studied three species are phylogenetically closely related with significant support, and this relationship corresponds with resemblance of their morphological features.