New data on agaricoid basidiomycetes of the national park "Yugyd va" (Subpolar and Northern Urals)

80 species of agaricoid basidiomycetes were found for the first time for the«Yugyd va» National park (Subpolar and Northern Urals), with 22 species - new for the Komi Republic. Thus, taking into account the data obtained, to date 378 species and intraspecific taxon of agaricoid basidiomycetes are recorded for the national park. New records were made for two species included in the Red Book of the Komi Republic - Suillus placidus and Phyllotopsis nidulans. Several rare for Russia species were found ( Lactarius alpinus, Phaeocollybia festiva, Pseudobaeospora pillodii, Rhodocollybia fodiens, Tectella patellaris ).The proximity of Siberia and occurrence of Siberian trees Pinus sibirica and Abies sibirica in stands affect species diversity of agaricoid basidiomycetes. Thus, in the lower course of the Shchugor river we found some species forming mycorrhizas with Pinus sibirica ( Suillus acidus, S. placidus and S. sibiricus ). The main distribution area of these species is Siberia, Russian Far East and North America. Its western distribution boundary runs along the Urals.For the first time for the Republic of Komi in stands of Duschekia fruticosa the species of agaricoid basidomycetes were identified: Cortinarius bibulus, Lactarius alpinus, Naucoria escharioides, Marasmius siccus and Tectella patellaris. All these species are associated with alder trees, thus Cortinarius bibulus, Lactarius alpinus and Naucoria escharioides are mycorrhiza-forming with this species, Tectella patellaris grow on the branches and trunks of alder, Marasmius siccus colonizes the leaf litter of alder.Structure of the agaricoid basidomycetes biota is typical for the subzone of northern taiga, but with clear features of microbiota of the mountain and eastern regions.