The Helotiales of the Magadan and Chukotka areas of the Russian Arctic

Forty-four species of Helotiales are reported from two eastern areas, Magadan and Chukotka, of the Russian Arctic. Two new genera of Dermateaceae, Arctomollisia and Larissia, and 7 new species, Arctomollisa kolymensis, Hysteronaevia vassiljevae, Larissia pyrolae, Leptotrochila chamaemori, Nimbomollisia novosieversiae, Pseudonaevia epilobii (Dermateaceae), and Gorgoniceps arctica (Helotiaceae) are described. A new combination, Arctomollisia oxyparaphysata, is proposed.