Multiple isolates belonging to the basidiomycetous genus were obtained from forest soils in Serra da Arrábida Natural Park in Portugal. Phylogenetic analyses employing concatenated sequences of the D1/D2 domain and ITS region support the recognition of two novel species: f.a., sp. nov. (type strain CBS 14164 = PYCC 6956 = DSM 101473) and sp. nov. (type strain CBS 14089 = PYCC 6856 = DSM 101474). Whereas f. a. sp. nov. does not form hyphae, even when different strains are crossed, sp. nov. is self-fertile and forms mycelium with teliospores that upon germination give rise to slender basidia. The most remarkable physiological trait of the two novel species is their ability to grow at 35 °C, a property not observed for remaining species of the genus.
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