Global phylogenetic and morphological reassessment of Fomitiporella s.l. (Hymenochaetales, Basidiomycota): taxonomic delimitation of Fomitiporella s.s. and segregation of Rajchenbergia, gen. nov

Fomitiporella has been phylogenetically studied in order to taxonomically treat it more naturally. In order to establish Fomitiporella s.s., studies on the holotype of F. umbrinella (the type species of Fomitiporella ), and new specimens from the type locality, were carried out. Additionally, the holotype of Fuscoporella coruscans (the type species of Fuscoporella ) was studied. A new morphological conceptual delimitation of Fomitiporella s.s. is presented, with a more restricted distribution pattern, and Fuscoporella is chosen as a synonym of Fomitiporella . Moreover, Rajchenbergia, gen. nov. is segregated from Fomitiporella s.l. based on morphology, phylogenetic relationships and host distribution. Taxonomic implications for the group and other related taxa are discussed. Fomitiporella americana is synonymized with F . umbrinella , F . micropora with Fomitiporella coruscans , comb. nov., and F . melleopora is now in Tropicoporus melleoporus, comb. nov., based on type and reference material studies.