Polyporus minutosquamosus sp 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 as Polyporus minutosquamosus, nova species. In phylogenetic trees, based on combined ITS and partial nLSU rDNA sequences, it is nested within the Polyporus sensu lato Glade, but does not belong to any of the four subclades distinguished within this Glade. A key to species of genus Polyporus in tropical America is provided.