Thompson, J., 1997. American Arctic Lichens: The Microlichens.
Thallus lacking. Apothecia to 0.4 mm broad, dark rusty brown; margin thin, of same color, soon the apothecium becomes convex and the margin excluded, 1+ blue; hypothecium hyaline, 1+ blue; epihymenium rusty yellow, granular; hymenium 65-70 µm, hyaline, 1+ blue; paraphyses gradually widening to 3-3.5 µn, upper part of tips greenish brown, branching above; spores ellipsoid, polarilocular, 11-14 x 6-7 µm, septum 5 µm.
This species grows on old wood and twigs. It appears to be circumpolar arctic, being known from Siberia, Novaya Zemlya, and Greenland, and was reported by Ahti et al. (1973) from the Reindeer Preserve. Richards Island, at the mouth of the Mackenzie River.
Magnusson (1944c) characterizes this species by the small brown apothecia with spores that easily escape, lax hyphae in the hypothecium, the greenish brown tips of the paraphyses, and the 1+ blue reaction of the exterior of the margin.