Abstract
The subfamily Teloschistoideae (Teloschistaceae) is mainly distributed in the Southern Hemisphere. Just a few its species were recorded in eastern Asia, and only Teloschistes flavicans has been known in the Russian Far East. Here, we report the discovery of Tayloriellina microphyllina in the Primorye Territory on the eastern shore of Lake Khanka where it is abundant in xerothermic conditions of Quercus mongolica–Pinus × funebris forest. This corticolous Teloschistoideae species has been previously known in the temperate regions from the southern Canada to central Mexico in North America. Our finding is confirmed by molecular data (nrITS). Morphology and chemistry as well as long distance dispersal vs. relict origin of the Far Eastern population of T. microphyllina are shortly discussed.
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