The new species Corynespora thorii growing on Lecanora sp., Endophragmiella stordeuriana on Cladonia spp. and Sporidesmiella physconiicola on Physconia distorta are described, illustrated and discussed. Corynespora laevistipitata, hitherto known only from Europe and North America, is first reported on species of Lecanora from Asia, illustrated and briefly described. Endophragmiella franconica is first reported from Belarus. Key words: Lichenicolous fungi, Corynespora, Endophragmiella, Sporidesmiella, Belarus, Belgium, Japan, Russia, new species.