Metacalypogeia cordifolia is recorded for the first time for the Republic of Sakha (Yakutia) from the Udokan Range. The species was found in the shaded narrow with nearly vertical walls gorge, about 1.5 m wide and 2–3 m high, that accumulates snow, covering the plants in winter and has a seepage, watering the plants in summer. It is the northernmost mainland record of M. cordifolia. The identification is confirmed by obtained complete trnL-F cpDNA sequences corresponding to available sequences of M. cordifolia from the Russian Far East and Japan. The description of collected plants, their photomicrographs, and data on morphological variation, ecology, and distribution of M. cordifolia are provided. The key to distinguish M. cordifolia from morphologically similar northern taxa is presented. Differentiation of the genus from morphologically similar representatives of the genera Bazzania, Eocalypogeia, Calypogeia, Mnioloma, and Protocalypogeia is discussed. A joint analysis of bioclimatic data and habitat conditions, along with the absence of traces of glaciation at the place of gathering the species, indicate that it is a refugium. Metacalypogeia cordifolia in the Udokan Range appears to be an Eopleistocene relic.

Eight Hebeloma specimens from the high-altitude zone of Altai Mountains (West Siberia) were analyzed using morphological and molecular methods. Three species were identified (H. alpinum, H. dunense, H. excedens), including the previously unreported in Russia species H. excedens. The detailed morphological description and ecological data on H. excedens based on the studied collections are provided.

At the territory of the Lebyazhe City Forest Park (Kazan), 176 species were identified, of which 160 are lichens, nine are lichenicolous fungi, one is a facultatively lichenicolous, and six are saprotrophic non-lichenized fungi. Of these, 46 species are new to the Republic of Tatarstan, including the lichenicolous fungus Epithamnolia xanthoriae is reported for the first time for the Central European Russia. New habitats of protected in Tatarstan lichen Cresponea chloroconia were found. Most of the newly reported species are mainly widespread lichens in European Russia, which indicates that the lichen biota of Tatarstan is poorly investigated.

Information on the type material of the name Sporopodium caucasicum Elenkin et Woron. (≡ Gyalectidium caucasicum (Elenkin et Woron.) Vězda), stored in the lichenological herbarium of the Komarov Botanical Institute (LE L), is provided. The lectotype of the name is designated.

The article presents the first records: for Russia of one species of chrysophyte algae and one species of agaricoid basidiomycetes, for the Republic of Belarus of three lichenicolous fungi and four species of slime molds, for Uzbekistan and Tajikistan by one species of lichens, and the first records for regions of Russia: one charophyte for the Tambov Region, one diatom species for the Udmurtian Republic, five species of siphonous yellow-green algae for the Republic of Altai, Altai Territory and Nenets Autonomous Okrug, 22 species of basidiomycetes for St. Petersburg, Tyumen Region, and Republic of Altai, including two new species for the Asian part of Russia, two new species for Siberia, and three new species for West Siberia, nine myxomycetes for the Altai Territory, Novosibirsk Region, and Republic of Altai, two species of lichenicolous fungi for the Tver Region, eight species of lichens for the Irkutsk, Omsk, Tver regions, Altai Territory, Republic of Tuva, 19 species of mosses for the Kurgan, Magadan and Ryazan regions, Republic of North Ossetia — Alania, including one new species for the Caucasus. The data on their localities, habitats, distribution are provided. The specimens are kept in the herbaria ALTB, GSU, IBIW, LE, MAG, MSK, NSK, OMSK, PTZ, TOB, YSU, VU, of Institute of Botany, Plant Physiology and Genetics of the National Academy of Sciences of Tajikistan, collection of the Laboratory for Algology in the Papanin Institute for Biology of Inland Waters of the Russian Academy of Sciences, in the private collections of V. S. Vishnyakov, S. M. Goskova, and S. I. Genkal

The data on lichens of the Chukotka Autonomous Area are summarized. To date, 775 species are known for the mainland. Eighteen of them are listed by us for the territory for the first time in this paper. Porpidia rugosa and Rhizocarpon oederi are new for the Russian Far East. Twelve species are recorded for the Chukotka Autonomous Area for the first time, and four species are new for the mainland part of the Chukotka Autonomous Area.

The results of the study of the lichen flora of largest green areas of Petrozavodsk that located near the Kurgan ski center are presented. The territory is covered predominantly by feathermoss spruce forests, which have a typical middle-taiga appearance. In 11 forest types, 30 sample plots were established and described, where the lichen diversity was studied. A total of 157 species was recorded that constitutes 50% of the current diversity of Petrozavodsk. The lichen flora includes two species new to the Republic of Karelia, 24 new to Petrozavodsk, three species listed in the Red Data Book of the Republic of Karelia, and another three species included in the list of plant and animal species requiring special attention to their natural environment and recommended for bio-monitoring. Five lichen species are indicators of biologically valuable forests. The results indicate the high biological value of the studied area. The studied lichen flora is presented differently in specific forest communities: the number of lichen species in plots of 0.06 ha varies from 8 to 44, that is, the contribution of the number of species diversity of lichens found in individual sample plots to total lichen flora is only 5–28%. The leading complex characteristic that defines the species composition of lichens is the diversity of forest types, differing in moisture and soil richness. Another active factor is the age of the catastrophic disturbance. Overlapping each other, they lead to the formation of a mosaic of communities with different species composition of lichens. In addition, relatively independent characteristic in this sample is the diversity of substrates, leading to an increase in the species richness of the communities with an increase in substrate diversity. A close relationship was revealed between the species diversity of lichens in a certain type of forest and the size study area.

The article presents information about the first finding of Pholiota mucigera in Russia from the Koygorodskiy National Park (Komi Republic, north-east of the European part of Russia). It differs from other species of the genus Pholiota by the absence of cystidia and the presence of small spores without germ pore. The species is associated with old-growth, undisturbed mixed forests and grows on Populus tremula wood. For the studied specimen, ITS and LSU sequences were obtained and deposited in the international GenBank database.

The paper provides the data on aphyllophoroid fungi of the regional nature reserve “Orekhovsky” situated in the Priozersky and Vsevolozhsky districts of the Leningrad Region. Based on author’s research, 147 species of macromycetes of this group were recorded for the territory of the reserve, including the locations of protected in the Leningrad Region Junghuhnia collabens, J. pseudozilingiana and Rigidoporus crocatus. An annotated list of species with data on their habitats, substrates and frequency are presented. Hypochnicium cremicolor and Helicogloea subardosiaca are published for the first time for the Leningrad Region. Helicogloea subardosiaca are new for Russia. The specimens of some, including rare species are kept in the Herbarium of the Komarov Botanical Institute RAS (LE).

The paper provides the list of 132 lichens and five lichenicolous fungi new for Urup and/or Simushir islands. For all species the substrates, biotopes, localities, and the nearest known localities are given. Among them, Biatorella conspurcans is new for the Russian Far East, Cladonia glauca, Epilichen scabrosus, Muellerella lichenicola, and Xanthomendoza borealis — for the Sakhalin Region. Nine lichen species are reported for the first time for the Kuril Islands. Bryocaulon pseudosatoanum, Cetreliopsis asahinae, Lobaria pulmonaria, Ricasolia virens, and Sticta limbata are listed in the Red Data Book of Russian Federation.