The paper presents findings of 15 lichenized and lichen-allied species rarely recorded in southern Siberia and in Russia in general. All of them were collected for the first time on the territory of the Baikal Reserve (Southern Pribaikal'e, Mts.
Khamar-Daban). Absconditella celata is new to Asia.
Bacidia pycnidiata and Micarea micrococca are novelties to Siberia. Sarea resinae is new to South Siberia.
New records for the southern Baikal region include Arthonia helvola, A. vinosa, Biatora helvola, B. ocelliformis and Gyalideopsis piceicola. Cladonia acuminata and Lepraria finkii are additions to the lichen flora of the Khamar-Daban range.
The respective species are briefly discussed, mainly with regard to their distribution on the territory of Russia.