Revisiting the genus Hyphodermella (Basidiomycota, Polyporales) with descriptions of three new species

In this study, we revisited <i>Hyphodermella</i> with the aim of circumscribing the genus, exploring its species diversity, re-evaluating the usefulness of the morphological characters used for its identification, and providing a more precise interpretation of its geographical distribution. Specimens were studied using morphological characters and molecular phylogenetic analyses of the ITS, LSU, <i>RPB1</i>, and <i>RPB2</i> regions. The results of the concatenated phylogenetic trees based on two and four markers support the monophyly of <i>Hyphodermella</i> and the original description of the genus. Morphological and molecular evidence delimit six clades and one singleton within the <i>Hyphodermella</i> core; three of these correspond to species already described, <i>Hyphodermella corrugata</i>, <i>H. maunakeaensis</i>, and <i>H. rosae</i>, and three correspond to new species, <i>Hyphodermella paulusiae</i> <b>sp. nov</b>., <i>H. ryvardenii</i> <b>sp. nov</b>., and <i>H. salcedoae</i> <b>sp. nov</b>., which are described in this paper.