Thompson, J., 1997. American Arctic Lichens: The Microlichens.
Thallus continuous or chinky or becoming areolate-chinky, smooth, lacking pegs or ridges, brownish black, thin.
Perithecia in hemispherical raised bumps on the thallus, or more often appearing globular and set on the thallus, 0.1-0.2 mm broad, they are covered with a thin layer of thalloid tissue containing algae, the tip sometimes with a papilla at the ostiole; exciple reddish brown or dark brown; involucrellum lacking; gelatin I+ red; spores ellipsoid, 5-11 X 4-6 µm (Vainio 1909), or 7-12 X 5-7 µm.
This species grows on rocks on sea coasts. It was originally described from eastern Siberia and is known from Novaya Zemlya and Spitzbergen in the Arctic. It should be sought in the American Arctic, as it may well be circumpolar.