New records of lichens and allied fungi from the Kostroma Region, Russia

29 species of lichens, 3 non-lichenized calicioid fungi and 3 lichenicolous fungi are reported for the first time from the Kostroma Region. Among them, 15 species are new for the Central Federal District, including Myrionora albidula – a rare species with widely scattered locations, previously known only from the Southern Urals Mts in European Russia. The most important discoveries are confined to old-growth coniferous Picea sp. and Abies sibirica forests in the Kologriv Forest Nature Reserve. Two species (Leptogium burnetiae and Menegazzia terebrata) are included in the Red Data Book of Russian Federation. The distribution, ecology, taxonomic characters and conservation status of rare species and of those new for the Central Federal District are provided.