New perspectives in the generic classification of poroid Hymenochaetaceae

SALVADOR MONTOYA, CA; GOES-NETO, A; ELIAS, SG; DRECHSLER-SANTOS, ER; POPOFF, F.; ROBLEDO, G

Lima

Congreso; IX Congreso Latinoamericano de Micología; 2017

Asociación Latinoamericana de Micología

Hymenochaetaceae (Hymenochaetales, Agaricomycetes) comprises about 400 species and, as originally circumscribed, is not a monophyletic family. Traditionally, the family has been characterized by wood-decaying fungi with styrylpyrone contents that are responsible for a positive xanthochroic reaction on the basidiomata (e.g., a black coloration of the surface and tissues in KOH solution), simple-septate hyphae and setal elements. Among the poroid Hymenochaetaceae those genera that lack setae or setal hyphae and produce thick-walled, colored (pale yellow to rusty brown) basidiospores form a phylogenetic group, recently named proposed as ?phellinotus clade? and a new genus Phellinotus emerged with two conspicuous and common species growing on living Fabaceae trees from the Seasonally Dry Tropical Forests biome of Brazil. Phylogenetically, Phellinotus is closely related to Arambarria, Inocutis, Fomitiporella and other taxonomically unresolved terminal clades, and unrelated to Fulvifomes and Phylloporia. Actually, molecular and morphological studies of neotropical specimens will revel many other new species and genera in the ?phellinotus clade?. In this new systematic scenario, traditionally used genera will not recognised as monophyletic, as well as others sould be recovered from synonymy. Finally, ?phellinotus clade? seems to be an importante box of taxonomic surprises and the phylogenetic relationships among the Hymenochaetaceae deserves special systematic attention.