A monograph of section .

section encompasses white- or yellow-sporulating species mostly isolated from indoor and cave environments, food, feed, clinical material, soil and dung. Their identification is non-trivial due to largely uniform morphology. This study aims to re-evaluate the species boundaries in the section and present an overview of all existing species along with information on their ecology. For the analyses, we assembled a set of 113 strains with diverse origin. For the molecular analyses, we used DNA sequences of three house-keeping genes (, and ) and employed species delimitation methods based on a multispecies coalescent model. Classical phylogenetic methods and genealogical concordance phylogenetic species recognition (GCPSR) approaches were used for comparison. Phenotypic studies involved comparisons of macromorphology on four cultivation media, seven micromorphological characters and growth at temperatures ranging from 10 to 45 °C. Based on the integrative approach comprising four criteria (phylogenetic and phenotypic), all currently accepted species gained support, while two new species are proposed ( and ). In addition, we proposed the new name to replace an invalidly described . The revised section now encompasses nine species, some of which manifest a high level of intraspecific genetic and/or phenotypic variability (, and ) while others are more uniform (, or ). The growth rates on different media and at different temperatures, colony colours, production of soluble pigments, stipe dimensions and vesicle diameters contributed the most to the phenotypic species differentiation. Glässnerová & Hubka; Glässnerová & Hubka; Houbraken, Glässnerová & Hubka. Glässnerová K, Sklenář F, Jurjević Ž, Houbraken J, Yaguchi T, Visagie CM, Gené J, Siqueira JPZ, Kubátová A, Kolařík M, Hubka V (2022). A monograph of section . : 1-51. doi: 10.3114/sim.2022.102.01.