The paper provides data on morphology, ecology, differentiation and distribution of the crustose, epiphytic and epixylic lichen Rinodina sibirica in Eurasia. An anatomical and morphological description of R. sibirica is provided based on 138 specimens studied. Based on these records, we show that the distribution of the species from the Russian Far East is ranging from the Kamchatka Peninsula to the Mongolian border in the south and the Krasnoyarsk Territory and the Tyumen Region in the west. Current data suggest that R. sibirica is an American-Asian species with a wide Amphiberingian range, only slightly extending to Europe in the Ural Mts.