Fedosov, V.E., O.Yu. Pisarenko, A.V. Fedorova & E.A. Ignatova. 2024. Moss flora of Mondy (East Sayan Mountains, Republic of Buryatia, Asian Russia)

Arctoa (2025) 34: 1–23

doi: 10.15298/arctoa.34.01

A brief survey of the diversity of mosses in the dry western part of the Tunkinskaya Valley and the S-faced slope of Tunkinskie Goltsy Range above Mondy Settlement yielded 329 taxa including rare and interesting Amblyodon dealbatus, Andreaea heinemanii, Pseudaongstroemia fuji-alpina, Blindiadelphus diversifolius, Brachytheciastrum leiocarpum, Bryoerythrophyllum inaequalifoilum, B. latinervium, Bryum kuntzei, Campylopus schimeri, Catoscopium nigritum, Crossidium squamiferum, Didymodon anserinocapitatus, D. zanderi, Ditrichum orientale, Grimmia fuscolutea, G. mollis, Hydrogonium amplexifolium, H. gregarium, Indusiella thianschanica, Leptopterigynandrum tenellum, Lewinskya transcaucasica, Meesia hexasticha, Oncophorus virens ssp. minus, Oreas martiana, Orthotrichum crenulatum, O. sibiricum, Pararhexophyllum sollmanianum, Philonotis falcata, Plagiobryum zierii, Pohlia saprophila, Pterygoneurum sibiricum, Schistidium austrosibiricum, S. chenii, S. transbaikalense, Sphagnum olafii, S. talbotianum, S. tundrae, Stegonia latifolia, Symblepharis vaginata, Tayloria hornschuchii, Tortella spitzbergensis, T. splendida, Tortula atrovirens, T. laureri, etc. Twenty species are first reported for Republic of Buryatia based on our survey. A check-list of species and comments on the most interesting records are provided. Based on morpho-molecular study, Tortula sayanensis, a new species closely related to T. laureri is described from the alpine zone of Tunkinskie Goltsy Range; it also occurs in Tyva Republic and Okinskoe Plateau. Both “northern” species distributed mostly in permafrost area of North Asia, and “southern” Central Asian mountain species occur in this area; it results in a rich bryophyte flora despite of the rather low diversity of vegetation types.