Homostegia piggotii P. Karsten 1873

Homostegia piggotii (Berk. & Broome) P. Karsten (1873: 222) Notes:—This rather widely distributed species was previously known in the Far Eastern Federal District of the Russian Federation only from the Jewish Autonomous Region (Zhurbenko 2014). New to Sakhalin Region of the Russian Federation. Specimen examined:— RUSSIAN FEDERATION. Sakhalin Region: Shikotan Island, Tserkovnaya Bay, 43°44′16.5″N, 146°40′57.9″E, elev. 47 m, mixed forest, on Parmelia squarrosa (thallus) growing on Picea jezoensis, 15 June 2017, A.K. Ezhkin s.n. (LE F-355074).