Finds of new, rare, protected lichen species in Yakutia

The Republic of Sakha (Yakutia) is the largest constituent entity of the Russian Federation located in the northeast. Yakutia is located in the permafrost zone, characterized by a harsh, sharply continental climate. The variety of natural conditions determines the development of heterogeneous vegetation cover in various natural zones — from the Arctic deserts to the middle taiga. The main part of the republic's territory is occupied by mountainous structures, where the altitude zone is pronounced, and therefore its flora and mycobiota are quite diverse. To date, about 850 species of lichens are known for the region. The purpose of this work is to identify lichen species that are rare in the region, and to review the collections of the Herbarium of the IBPC SB RAS (SASY). The basis of this work was the author's collections in complex expeditions of the IBPC SB RAS in the Tomponsky, Oymyakonsky, Lensky districts, materials from the SASY herbarium. Lichen species were identified by the author in the laboratory of the Department of Botanical Research of the IBPC SB RAS using standard lichen identification methods. The lichens Brigantiaea fuscolutea and Cyphelium pinicola are new to the Republic of Sakha (Yakutia). For Parmelia pinnatifida, the second location of the species in Yakutia is noted. The species Pertusaria octomela is new to the Yano-Indigirsky floral region (FR), Lobaria linita is new to the Verkhne-Lensky region. Rare lichen species Asahinea scholanderi, Masonhalea richardsonii, Pyxine sorediata are listed in the Red Books of the Russian Federation and the RS (Ya); species Arctocetraria nigricascens, Lobaria isidiosa are included in the Red Book of the RS (Ya); lichen Cetrelia cetrarioides is listed as in need of monitoring. New information about the location is provided for each species, and information about specimens of this species previously discovered in Yakutia is summarized. Information is provided on the distribution of these rare lichen species in Yakutia in adjacent territories.

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