Ecology: Biotroph; lichenized; endosubstratic; substrate non-calciferous or metalliferous. Thallus: Not subdivided parts, areolate (primarily areolate), dispersed throughout and distinctly seperate; lobes angular at the front; separate thallus parts 0 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted. Thallus Outline: Margin concolorous the thallus centre. Upper Surface: White, plane; not sorediate; without thalloconidia thalloconidia. Medulla: Iodine reaction in Lugol's solution negative to in Lugol's solution positive. Ascocarps: Soon sessile, slightly constricted to strongly constricted at the base, 60-200 per cm², .4-.8-(1.3) mm in diam.. Margin: Not flexuose to slightly flexuose, persistent, 30-150 µm wide, epruinose. Disk: Plane to weakly convex to strongly convex, black, epruinose, without an umbo. Exciple: Hyphae radiating outwards; 3-3.5 µm wide; grey to pink (rosé); not inspersed with crystals. Epithecium: Apical cells turquoise (An.-Nr. 2182 from Greenland) or very dark brown or black, cell pigment reacting with 10% HCl (in H2O). Hymenium: 50-70 µm high; white or pink (rosé); iodine reaction: Lugol’s positive. Subhymenium: 0-30 µm high; white. Hypothecium: White or brownish yellow. Ascospores: Ellipsoid, (6)-8.6-11.3-(14) µm long, (4)-4.8-5.7-(6.5) µm wide; wall not ornamented. Secondary Metabolites: Not detected. Spot Tests: Medulla: K –, C –, PD – ascocarp margin (in section): K – or + bluish red, C – disk: C – hypothecium: K – or + purplish brown (chinoide reaction); epihymenium: K –.