Taxonomic reevaluation on (, ) and reclassification of species based on phylogenetic and type studies.

We reevaluated the species belonging to the genus that were collected from Japan and Malaysia based phylogenetic analyses and morphological investigations. We found that is distinct from . species with setal hyphae include , , , and . , synonymized with in earlier studies, was distinct from . All isolates from trees damaged by brown root rot were accommodated in the same clade with , and the cause of the disease was confirmed as . resembles but is distinguished by a glabrous pileus surface and abundant hymenial setae. species are similar to some species but are distinguished by the duplex context separated by a thin crust composed of nonagglutinated hyphae. Some species produce setal hyphae in the trama and context like some species. However, the hyphae of these species are acuminate at the tip, tapered toward the base, and often swollen toward the tip, whereas those of the species are cylindrical and mostly equal. The following new combinations are proposed: and .