VOLUME 4 DECEMBER 2019 Fungal Systematics and Evolution PAGES 77–96 doi.org/10.3114/fuse.2019.04.07 Hydnoporia, an older name for Pseudochaete and Hymenochaetopsis, and typification of the genus Hymenochaete (Hymenochaetales, Basidiomycota) O. Miettinen1*, K.-H. Larsson2, V. Spirin1 1Finnish Museum of Natural History, P.O. Box 7, 00014 University of Helsinki, Finland 2Gothenburg Global Biodiversity Centre, P.O. Box 461, 40530 Göteborg, Sweden *Corresponding author:
[email protected] Key words: Abstract: The genus name Hydnoporia is reinstated to encompass the Hymenochaete tabacina group currently addressed to Hydnochaete Pseudochaete (illegitimate genus) or Hymenochaetopsis. Identity of the type species of Hydnoporia, Sistotrema fuscescens Hymenochaetaceae (= Hydnoporia olivacea in current sense), is clarified, and a lectotype is selected. In total, 12 species are combined in new taxa Hydnoporia: H. corrugata, H. gigasetosa, H. lamellata, H. laricicola, H. latesetosa, H. lenta, H. rhododendri, H. rimosa, H. taxonomy subrigidula, H. tabacina, H. tabacinoides, and H. yasudai. Hydnoporia diffissa is described as new. Analyses of all available typification ITS (94) and newly produced tef1 sequences (20) indicate that there are at least 20–27 species in the genus. Identity of the type species of Hymenochaete, H. rubiginosa, is clarified; the name is retained for the species so named in Europe while other species are present in North America and East Asia. Additionally, three new combinations in Hymenochaete are proposed: H. campylopora (= Cyclomyces fuscus), H. microcycla (= Cyclomyces tabacinus), and H. saepiaria. Effectively published online: 4 June 2019. INTRODUCTION additional species belong to Pseudochaete (He & Dai 2012, He Editor-in-Chief Prof. dr P.W.