Lichens and allied fungi of the Ragusha River Protected Area (Leningrad Region, Russia).

The lichen biota of the Ragusha River (protected area in Leningrad Region) is studied. In total 221 species (211 lichenized, 5 lichenicolous and 5 saprobic fungi) are listed. Lecanora perpruinosa is new to North-Western European Russia. Lathagrium fuscovirens, Pronectria erythrinella, Protoblastenia rupestris, Thelidium minutulum, T. zwackhii and Tremella hypogymniae are reported for the first time for Leningrad Region, and Ochrolechia bahusiensis for Eastern Leningrad Region. The most noteworthy part of lichen biota is the complex of 21 calcicolous lichens. Eleven of them are known in the region only from the Ragusha River valley. [ABSTRACT FROM AUTHOR]