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Four species of saxicolous and acidophilous lichens - Dermatocarpon miniatum, Trapelia coarctata, Trapelia placodioides, and Umbilicaria hirsuta found on different types of granite boulders were reported as new to Latvian lichen biota. Data on substratum geology, accompanying species, microhabitat and distribution in neighbouring to Latvia countries are provided.

Six lichenized fungi (Calicium parvum, C. trabinellum, Carbonicola anthracophila, C. myrmecina, Peltigera extenuata, Pycnora sorophora), two lichenicolous (Clypeococcum hypocenomycis and Illosporium carneum), and two saprobic calicioid fungi (Chaenothecopsis savonica and Microcalicium arenarium) are reported as new for Latvia.

AbstractAll available specimens (98) of the genus Cetrelia from Latvia (Northern Europe) in the Herbaria DAU and RIG were revised. Cetrelia cetrarioides, C. olivetorum and C. monachorum were confirmed to occur in the country. The last taxon is new to Latvia. Distribution maps and habitat preferences of all three species in Latvia were presented, and their conservation status was discussed.