Thallus gray to ashy or brownish gray, crustose, closely attached to the rocks, with thin, slightly zonate thallus and the areolae radiate to the margins, the angular areolae tiny, to 0.3 mm broad, more elongate in the radiate direction, centrally with round soralia, 0.2-0.3 mm broad with bluish gray soredia, sometimes heaped, sometimes eroded out; cortex thin, not inspersed. Apothecia unknown. Conidia 20-25 µm (according to Lynge 1940).

Reactions: medulla K+ yellow.

Contents: not identified.

This species grows on noncalcareous rocks. Its range is not well defined, as it has been poorly collected other than in Novaya Zemlya, where it appears to be common. Occurrences in Greenland arc under various synonyms. I reported an occurrence at Bathurst Inlet. Northwest Territories, under the name A. bennettii.