The order Onygenales is classified in the class Eurotiomycetes of the subphylum Pezizomycotina. Families in this order have classically been isolated from soil and dung, and two lineages contain causative agents of superficial, cutaneous and systemic infections in mammals. The ecology and habitat choices of the species are driven mainly by the keratin and cellulose degradation abilities. The present study aimed to investigate whether the ecological trends of the members of Onygenales can be interpreted in an evolutionary sense, linking phylogenetic parameters with habitat preferences, to achieve polyphasic definitions of the main taxonomic groups. Evolutionary processes were estimated by multiple gene genealogies and divergence time analysis. Previously described families, namely, Arthrodermataceae, Ajellomycetaceae, Ascosphaeraceae, Eremascaceae, Gymnoascaceae, Onygenaceae and Spiromastigoidaceae, were accepted in Onygenales, and two new families, Malbrancheaceae and Neogymnomycetaceae, were introduced. A number of species could not be assigned to any of the defined families. Our study provides a revised overview of the main lines of taxonomy of Onygenales, supported by multilocus analyses of ITS, LSU, TUB, TEF1, TEF3, RPB1, RPB2, and ribosomal protein 60S L10 (L1) (RP60S) sequences, combined with available data on ecology, physiology, morphology, and genomics.
Taxonomy and phylogeny of poroid Hymenochaetaceae based on the most comprehensive phylogenetic analyses are presented. A phylogeny based on a combined dataset of ITS and nLSU sequences for accepted genera of Hymenochaetaceae was analyzed and two or multigene phylogenies for most species of ten large genera including Coltricia, Fomitiporella, Fomitiporia, Fulvifomes, Fuscoporia, Inonotus, Phylloporia, Porodaedalea, Sanghuangporus and Tropicoporus, were carried out. Based on samples from 37 countries of five continents, seven new genera, Meganotus, Neophellinus, Nothonotus, Pachynotus, Perenninotus, Pseudophylloporia and Rigidonotus, are introduced, 37 new species, Coltricia tibetica, Fomitiporella crassa, F. queenslandica, Fomitiporia eucalypti, F. gatesii, F. ovoidospora, Fulvifomes azonatus, F. caligoporus, F. costaricense, F. floridanus, F. jouzaii, F. nakasoneae, F. subindicus, Fuscoporia sinuosa, F. submurina, Inonotus subradiatus, I. vietnamensis, Neomensularia castanopsidis, Pachynotus punctatus, Phellinus cuspidatus, P. subellipsoideus, Phylloporia minutissima, P. tabernaemontanae, Porodaedalea occidentiamericana, P. orientoamericana, P. qilianensis, P. schrenkianae, Pseudophylloporia australiana, Sanghuangporus australianus, S. lagerstroemiae, Tropicoporus angustisulcatus, T. hainanicus, T. lineatus, T. minus, T. ravidus, T. substratificans and T. tenuis, are described, and 108 new combinations are proposed. In addition, one illegitimate name and two invalid names are renamed, and Coltricia and Coltriciella were synonymized. The taxonomic relevance and limits of the new taxa are discussed. Photos and illustrations for 37 new species are presented, and a full description for each new species is given. Eventually, this study recognizes 672 species in 34 genera and provides a modern treatment of the poroid Hymenochaetaceae in the world. A key to the accepted poroid genera of Hymenochaetaceae is provided, and identification keys to the accepted species of 32 poroid genera worldwide are given. A synopsis description of each species is included in these keys.