crust lichen, on rock (not sandstone) THALLUS: subsquamulose, areoles not overlapping, shiny, deep grayish brown, convex, K-, C- MEDULLA: whitish, K-, C- ALGAE: green, in a continuous layer APOTHECIA: sunken, one per areole; epihymenium brown; hymenium clear; hypothecium clear, going quite deep; paraphyses simple, clear, gradually enlarging upward, 3.1+/-0.5 m wide at base and 4.8+/-0.5 m wide at tips; asci broadly clavate, walls and tip I+ very weak blue; all POL-, all K- SPORES: many per ascus, clear, simple, round to oblong, (3.5)4.9+/-0.8(6.4) x (2.1)2.8+/-0.4(3.6) m (N=27)