Contribution to the study of the lichen genera Cladina and Cladonia in the Russian Arctic, mainly from Taimyr Peninsula and Severnaya Zemlya

A total of 42 Cladonia and Cladina species are reported from the Russian Arctic, mainly from Taimyr Peninsula and Severnaya Zemlya. Psoromic acid strain of Cladonia acuminata is new to continental Asia. Cladonia cornuta ssp. groenlandica and C. uncialis subsp. biuncialis are new to the Russian Arctic, and Cladonia cf. alinii, C. floerkeana, C. luteoalba, and psoromic strain of C. symphycarpia are the second reports for this region. Four species are new to New Siberian Is., one species is new to Wrangel I., four species are new to Taimyr Peninsula, and 19 species are new to Severnaya Zemlya. Zonal distribution of Cladonia and Cladina species within a Central Siberian Arctic transect is presented.