Thompson, J., 1997. American Arctic Lichens: The Microlichens.
Thallus effuse, thin, white. Apothecia sessile, small, 0.4-0.5 mm; thalloid margin cellular, I—; outer edge of exciple brown; disk black, the margin minutely crenulate; hypothecium hyaline to gray; epihymenium brown; hymenium 75-85 μm, hyaline, 1+ blue; paraphyses 1.5-2 μm, tips 3-4 μm and darkened, additional dark granules in the epihymenium; spores with curiously bladdery appearance at tips (not really mucronate), ellipsoid, dark brown, with prominent porus and lamella, 22-30 X 8-9 μm.
This species grows on decaying wood. It was originally described from Siberia but is also found in Alaska and western Canada. It may represent an amphi-Beringian element in the flora.