Cercidospora parva new for Poland and some other noteworthy records of lichen-forming and lichenicolous fungi from the Karkonosze Mountains

Three noteworthy epilithic lichens species, Porpidia flavocruenta, P. thomsonii and Rhizocarpon cinereovirens, and two lichenicolous fungi, Cercidospora parva and Abrothallus aff. caerulescens were recently recorded in the Polish part of the Karkonosze Mountains. Cercidospora parva is reported from Poland for the first time. Abrothallus aff. caerulescens and Porpidia thomsonii are new for the Western Sudetes. Rhizocarpon cinereovirens has been rediscovered in the Karkonosze Mountains afer over a century. Porpidia flavocruenta is known in Poland only from the Karkonosze Mountains, it is reported here from a new substrate, hornfels. Descriptions, notes on similar species, habitat preferences, and distribution of each species are provided.