Protologue type data: Type: Michigan. Keweenaw Co.: Isle Royale National Park, Passage Is., Wetmore 47460 (MIN).

Type locality: USA, Michigan, Keweenaw County, Isle Royale National Park, Passage Island, on rocks, Wetmore 47460 (MIN - holotype).

Type locality coordinates: 48°14'7"N, 88°20'59"W; 48.235278, -88.349722.

ITS barcode: Data lacking.

Description: Lichen. Thallus crustose, white, scabrid and chalky, continuous, subrimose with common convex (bullate) verrucae, 0.5-0.86-2.0 mm thick; margin distinct and thinner than thallus center; prothallus black, thin; medulla IKI-; soredia absent. Apothecia abundant, scattered to infrequently contiguous, soon becoming sessile, 0.8-1.2-2.0 mm diameter; ... (Gowan 1989: 38).

Photobiont: Data lacking.

Chemistry: Only a trace of stictic acid seen (accessory) (Gowan 1989: 38).

Ecology: HCl+ rocks in forests, in bogs, and on lakeshores.

Distribution type: Endemic on the shores of Lake Superior. Northeastern temperate to hemiboreal zone (Gowan 1989: 38).

Distribution Database: Distributions

Distribution Database: Discover Life

Picture Database: Tropical Lichens

Molecular Database: Genbank

Synonym Database: Index Fungorum

Synonym Database: Mycobank