The paper presents the first record for Russia of one species of agaricoid fungus and two species of lichens, first records for the Republic of Belarus of one species of myxomycetes and two species of lichenicolous fungi, first records for the Republic of Azerbaijan of two species of lichens new for the Caucasus, and the first records for regions of Russia: one a siphonous yellow-green alga for the Arkhangelsk Region, one diatom for the Udmurtian Republic, four silica-scaled chrysophyte species for the Republic of Sakha (Yakutia), two species ascomycetes for the Omsk Region, 18 species of ba- sidiomycetes for the republics of Altai and Tuva, Omsk, Tyumen, Yaroslavl regions, including three species new to Siberia; 28 species of lichens for the Arkhangelsk and Murmansk regions, republics of Bashkortostan, Buryatia, Dagestan, and Tuva, Altai and Trans-Baikal territories, including by one species new to Siberia and Asian Russia; four species of mosses for the Leningrad and Lipetsk regions, and Chukotka Autonomous Area. The data on their localities, habitats, distribution are provided. The specimens are kept in the herbaria ALTB, BAK, DAG, GSU, H, KPABG, LE, MSK, NSK, OMSK, PZV, TOB, UFU, VU, YSU, in the algological collection in the Laboratory of Cell Ultrastructure of the Limnological Institute SB RAS (LIN), the Laboratory for Algology IBIW RAS, and the private collection of S. M. Goskova. Sequences of the ITS1-5.8S-ITS2 nrDNA region of some reported specimens of fungi have been deposited in the GenBank (NCBI). Keywords: Agaricus altipes, Arthonia helvola, Arthonia molendoi, Ascomycota, Aspicilia aquatica, Athelia nivea, Baci dina chloroticula, Basidiomycota, Biatora fallax, Botryobasidium isabellinum, Bryoerythrophyllum latinervium, Buellia ar borea, Buellia arnoldii, Buellia erubescens, Calicium tigillare, Caloneis bottnica, Calvitimela perlata, Catillaria nigroclavata, Chrysophyceae, Circinaria reagens, Clitocybe festivoides, Clitocybe nebularis, Coniophora arida, Didymocyrtis epiphyscia s. l., Diploschistes diacapsis, Didymodon mongolicus, Entoloma alnetorum, Ephemerocybe callina, Fuscidea arboricola, Halecania giraltiae, Hygrocybe coccinea, Hygrophorus agathosmus, Inocybe teraturgus, Junghuhnia nitida, Lecanora albella, Lecanora boligera, Lepraria incana, Mallomonas paludosa, Melanoleuca acystidiata, Micarea byssacea, Micarea peliocarpa, Mnium ly copodioides, Mycena pelianthina, Myxomycetes, Paradiacheopsis cribrata, Parmelia pinnatifida, Peltigera retifoveata, Phaeo graphis dendritica, Phellinidium ferrugineofuscum, Phlebia radiata, Polyporus umbellatus, Pseudoplectania episphagnum, Punctelia borreri, Pyrenocarpon thelostomum, Ropalospora viridis, Rostania pallida, Rhizina undulata, Reichlingia zwackhii, Skeletocutis odora, Stereocaulon sasakii, Stereocaulon sibiricum, Synura biseriata, Synura bjoerkii, Synura macracantha, Tim mia comata, Toniniopsis separabilis, Vaucheria prona, agaricoid fungi, aphyllophoroid fungi, diatoms, lichens, mosses, myco- biota, new records, silica-scaled chrysophytes, siphonous yellow-green algae, Altai Territory, Arkhangelsk Region, Asian Russia, Azerbaijan, Caucasus, Chukotka, Chukotka Autonomous Area, East Siberia, European Russia, Gunib Plateau, Khi- biny, Leningrad Region, Lipetsk Region, Lovozerskie tundry, Murmansk Region, Omsk Region, Republic of Altai, Republic of Bashkortostan, Republic of Belarus, Republic of Buryatia, Republic of Dagestan, Republic of Sakha, Republic of Tuva, Russia, Salair National Park, Salair Ridge, Samursky National Park, Siberia, Sotinsky nature reserve, Talysh, Trans-Baikal Territory, Tyumen Region, Udmurtian Republic, Urals, West Siberia, Yakutia, Yaroslavl Region.