Known from at least 25 records (Thomson, John W. American Arctic Lichens: Vol. 2. The Microlichens. University of Wisconsin Press, 1997.; Bird, Charles D., et al. "Lichens from the area drained by the Peel and Mackenzie rivers, Yukon and Northwest Territories, Canada. II. Microlichens." Canadian Journal of Botany 59.7 (1981): 1231-1252.; Thomson, John W., George W. Scotter, and Teuvo Ahti. "Lichens of the Great Slave Lake Region, Northwest Territories, Canada." Bryologist (1969): 137-177.; F; MICH; MIN; NEB; WIS)