Observations on Pluteus (Pluteaceae) diversity in South Siberia, Russia: morphological and molecular data
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A study of Pluteus collections from the southern region of Siberia, Russia, revealed the occurrence of 20 species. One species (Pluteus umbrosoides) and one form (P. tomentosulus f. brunneus) are proposed as new. Pluteus rugosidiscus is a new record in Eurasia and P. velutinus is recorded for the first time in Russia. Most species in the studied territory occur in coniferous or mixed forests. Until now, there have been only sporadic finds of Pluteus in the sub-taiga zone and no finds in the steppe zone. Detailed morphological descriptions, illustrations and drawings of microstructures for new, rare and interesting taxa are provided. Phylogenetic analyses inferred from the internal transcribed spacer (nrITS) were conducted for species delimitation and for comparisons with closely related taxa.
KeywordsAgaricales Biodiversity Taxonomy Phylogeny New species New form
The authors are very grateful to the staff of the Sayano-Shushensky Nature Reserve and especially to the Deputy Director for Science, Dr. Sergey N. Lineytsev, for the perfect organization of our field work. We thank Sava Krstic and Dave Wasilewski, for their collections and photographs of Pluteus tomentosulus. The research was carried out using equipment of The Core Facility Center “Cell and Molecular Technologies in Plant Science” at the Komarov Botanical Institute RAS (St.-Petersburg, Russia). The financial support for this study was provided in the framework of an institutional research project of the Komarov Botanical Institute RAS (project № 01201255604).
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