Contribution to Umbilicariaceae (lichenized Ascomycota) studies in Russia I. Mainly arctic species

摘要

Two species ofLasallia and 18 of Umbilicaria are reported from the Arctic, North-East Sakha-Yakutia Republic and Magadan Region of Russia. Of these, Umbilicaria cinereorufescens and U. nylanderiana are new for the Russian Arctic, U. aprina is new forSakha-Yakutia and Krasnoyarsk Territory, U. hirsuta is new for Sakha-Yakutia and U. virginis is new for Taimyr Peninsula. Previous reports of Lasallia caroliniana, L. pustulata, L. rossica, Umbilicaria crustulosa, U. hirsuta, U. muehlenbergii and U. polyphylla are considered doubtful for the Russian Arctic.