Polyporus minutosquamosussp. nov. from tropical rainforests in French Guiana with a key to neotropical species of Polyporus(Polyporaceae, Basidiomycota)

Tropical rainforests present high biodiversity, including high numbers of unknown fungal species. During a fungal survey in continuous near-natural rainforests in natural reserve of Kaw, French Guiana, we collected a remarkable polypore, characterized by a lateral stipe and numerous small black scales on its flabelliform pileus. It is here described asPolyporus minutosquamosus, nova species. In phylogenetic trees, based on combined ITS and partial nLSU rDNA sequences, it is nested within thePolyporus sensu lato clade, but does not belong to any of the four subclades distinguished within this clade. A key to species of genusPolyporusin tropical America is provided.