A new species, .i.Pluteus floccipes./i., is described and illustrated based on material from the Czech Republic. It is characterised by a dark brown pileus with an opaque surface, a pileipellis in the form of a euhymeniderm, presence of cheilocystidia with brown pigment, and a whitish stipe with brown floccules. The pileipellis structure indicates its placement in section .i.Celluloderma./i.. According to a phylogenetic analysis (ITS rDNA), .i.P. floccipes./i. is closely related to .i.P. nanus./i., .i.P. cinereofuscus./i. and .i.P. eludens./i.. Morphological differences with similar species are described and discussed. Furthermore, probable synonymy of .i.P. phlebophorus./i. and .i.P. luctuosus./i. was supported by the phylogenetic analysis of Czech collections.
Ševčíková et al. (Thu,) studied this question.