NEW RECORDS OF BASIDIOMYCETES FROM THE PSKOV REGION IN THE POLISTOVSKIY STATE NATURE RESERVE (RUSSIA)
Prior to a present paper, 918 species of basidiomycete fungi were known in the Pskov region (Russia), including 512 species recorded in the Sebezhskiy National Park. Fungal inventorying studies in Protected Areas are an important part of biodiversity assessment. The constantly expanding knowledge on this vast group of organisms, powered by new finds in the field and advances in molecular genetics, make fungal inventorying in any territory a long-term effort rather than an isolated event. In 2019, we assessed the fungal biota of the Polistovskiy State Nature Reserve (Pskov region, Russia) in various forest types in the core and buffer zones along nine designated routes. The material was studied using the standard methods of fungal taxonomy. As a result, 74 basidomycete species new to Pskov region were revealed. Among them, six species (<i>Galerina hybrida</i>, <i>Gymnopus erythropus</i>, <i>Lepiota boudieri</i>, <i>Pluteus velutinus</i>, <i>Rugosomyces obscurissimus</i>, and <i>Simocybe haustellaris</i>) were new to the Northwest of European Russia and four species (<i>Achroomyces effusus</i>, <i>Botryobasidium stigmatisporum</i>, <i>Galerina caulocystidiata</i>, and <i>Pseudobaeospora celluloderma</i>) were new for Russia. The former are here provided with brief notes, whereas the latter are supplied with descriptions of studied specimens, drawings of microstructures and discussion of their distribution, habitats, similar and closely related species, and current state of knowledge. We found also <i>Hemistropahria albocrenulata</i>, a protected species in Finland and the adjacent Leningrad region and Novgorod region. <i>Helicogloea compressa</i> was registered for the second time in Russia, with another record in St. Petersburg city. Despite substantially expanding our knowledge of the mycobiota in both the Polistovskiy State Nature Reserve and Pskov region, the present data are still insufficient for a comprehensive quantitative analysis of its structure.