We studied the taxonomy of Pluteus podospileus and similar species using morphological and molecular (nrITS, TEF1-α) data, including a detailed study of the type collections of P. inflatus var. alneus, Pluteus minutissimus f. major, and P. granulatus var. tenellus. Within the P. podospileus complex, we phylogenetically confirmed six species in Europe, five in Asia, and eight in North America. Based on our results, we recognize P. seticeps as a separate species occurring in North America, while P. podospileus is limited to Eurasia. We describe six new species and a new variety: P. absconditus, P. fuscodiscus, P. gausapatus, P. inexpectatus, P. millsii, and P. notabilis and its variety, P. notabilis var. insignis. We elevate Pluteus seticeps var. cystidiosus to species rank as Pluteus cystidiosus. Based on the holotype of P. inflatus var. alneus, collections of P. inflatus identified by Velenovský, and several modern collections, we resurrect the name P. inflatus. Based on molecular analyses of syntypes of Pluteus minutissimus f. major and a holotype of Pluteus granulatus var. tenellus, we synonymize them under P. inflatus. We also increase our knowledge about the morphology and distribution of P. cutefractus.

Associazione Micologica Bassa Friulana Via Vespucci 7 33052 Cervignano del Friuli Italy

Calle Tudela 20 50650 Gallur Zaragoza Spain

Center for Evolutionary Hologenomics Globe Institute University of Copenhagen Øster Farimagsgade 5 1014 Copenhagen Denmark

Center for Macroecology Evolution and Climate Globe Institute University of Copenhagen Universitetsparken 15 2100 Copenhagen Denmark

Department of Botany Moravian Museum Zelný trh 6 659 37 Brno Czech Republic

Department of Ecology and Evolutionary Biology University of Tennessee 1416 Circle Dr Knoxville TN 37916 USA

Department of Ecology and Evolutionary Biology University of Tennessee Knoxville TN 37996 USA

Department of Plant and Animal Production Atabey Vocational School Isparta University of Applied Sciences 32670 Isparta Turkey

Dipartimento di Scienze e Innovazione Tecnologica Università del Piemonte Orientale Viale T Michel 11 15121 Alessandria Italy

Institut de Systématique Évolution Biodiversité 45 rue Buffon 75005 Paris France

Institute of Ecology and Earth Sciences University of Tartu J Liivi 2 50409 Tartu Estonia

Institute of Geology of the Czech Academy of Sciences Rozvojová 269 165 00 Prague Czech Republic

New Brunswick Museum 277 Douglas Ave Saint John NB E2K 1E5 Canada

Rang du Rapide Nord Saint Casimir QC G0A 3L0 Canada

Section for Geogenetics Globe Institute University of Copenhagen Øster Voldgade 5 7 1350 Copenhagen Denmark

Shatelena Str 20 194021 St Petersburg Russia

The Hoosier Mushroom Society 3912 S Carey St Marion IN 46953 USA

USDA APHIS PPQ Seattle Plant Inspection Station 835 S 192nd St Suite 1600 SeaTac WA 98148 USA

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