With the advance to one scientific name for each fungal species, the generic names in the class Sordariomycetes typified by sexual and asexual morphs are evaluated based on their type species to determine if they compete with each other for use or protection. Recommendations are made for which of the competing generic names should be used based on criteria such as priority, number of potential names changes, and frequency of use. Some recommendations for well-known genera include Arthrinium over Apiospora, Colletotrichum over Glomerella, Menispora over Zignoëlla, Microdochium over Monographella, Nigrospora over Khuskia, and Plectosphaerella over Plectosporium. All competing generic names are listed in a table of recommended names along with the required action. If priority is not accorded to sexually typified generic names after 2017, only four names would require formal protection: Chaetosphaerella over Oedemium, Diatrype over Libertella, Microdochium over Monographella, and Phaeoacremonium over Romellia and Togninia. Concerning species in the recommended genera, one replacement name (Xylaria benjaminii nom. nov.) is introduced, and the following new combinations are made: Arthrinium sinense, Chloridium caesium, C. chloroconium, C. gonytrichii, Corollospora marina, C. parvula, C. ramulosa, Juncigena fruticosae, Melanospora simplex, Seimatosporium massarina, Sporoschisma daemonoropis, S. taitense, Torpedospora mangrovei, Xylaria penicilliopsis, and X. termiticola combs. nov.

CBS KNAW Fungal Biodiversity Institute Uppsalalaan 8 3584 CT Utrecht The Netherlands

Center of Excellence in Fungal Research School of Science Mae Fah Luang University Chiang Rai 57100 Thailand

Comparative Plant and Fungal Biology Royal Botanic Gardens Kew Surrey TW9 3DS UK

Departamento de Biología Vegetal 2 Facultad de Farmacia Universidad Complutense Plaza de Ramón y Cajal s n Madrid 28040 Spain; Department of Life Sciences The Natural History Museum Cromwell Road London SW7 5BD UK; Comparative Plant and Fungal Biology Royal Botanic Gardens Kew Surrey TW9 3DS UK

Department of Botany and Microbiology College of Science King Saud University P O Box 2455 Riyadh 11451 Saudi Arabia

Department of Botany and Microbiology Faculty of Science Sohag University Sohag 82524 Egypt

Department of Botany and Plant Pathology Oregon State University Corvallis Oregon 97331 USA;

Department of Chemistry and Biochemistry 457 Sullivan Science Building University of North Carolina Greensboro NC 27402 6170 USA

Department of Crop Sciences College of Agricultural and Marine Sciences Sultan Qaboos University PO Box 8 123 Al Khoud Oman

Department of Microbiology and Plant Pathology University of Pretoria Pretoria 0002 South Africa

Department of Mycology Institute of Ecology Evolution and Diversity Goethe University Max von Laue Str 13 60438 Frankfurt am Main Germany

Department of Taxonomy Institute of Botany of the Academy of Sciences of the Czech Republic Prùhonice 252 43 Czech Republic

Division of Systematic and Evolutionary Botany Department of Botany and Biodiversity Research University of Vienna Vienna Austria

Illinois Natural History Survey University of Illinois Champaign Illinois 61820 USA

Institute of Forest Entomology Forest Pathology and Forest Protection Department of Forest and Soil Sciences BOKU University of Natural Resources and Life Sciences Vienna Austria; Division of Systematic and Evolutionary Botany Department of Botany and Biodiversity Research University of Vienna Vienna Austria

Institute of Marine Biology and Centre of Excellence for the Oceans National Taiwan Ocean University 2 Pei Ning Road Keelung 20224 Taiwan

Institute of Plant and Microbial Biology Academia Sinica Nankang Taipei 115 29 Taiwan

Instituto de Micología y Botánica UBA CONICET Departamento de Biodiversidad y Biología Experimental Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires Pabellón 2 Piso 4° Lab 6 Av Int Güiraldes 2620 Ciudad Universitaria C1428EHA Buenos Aires Argentina

Manaaki Whenua Landcare Research Private Bag 92170 Auckland New Zealand

Ottawa Research and Development Centre Biodiversity Agriculture and Agri Food Canada 960 Carling Avenue Ottawa Ontario K1A 0C6 Canada

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