[Lecidea lactea var. ecrustacea (Anzi ex Arnold) Clauzade & Cl. Roux, moreLecidea polycarpa var. ecrustacea (Anzi ex Arnold) Jatta, Lecidella ecrustacea (Anzi ex Arnold) Arnold, Lecidella plana var. ecrustacea (Anzi ex Arnold) Nyl., Lecidella polycarpa f. ecrustacea Anzi ex Arnold, Lecidella polycarpa var. ecrustacea Anzi ex Arnold]
Ecology: Biotroph; lichenized; endosubstratic; substrate non-calciferous. Thallus: Not subdivided parts, 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 positive. Ascocarps: Soon sessile, slightly constricted or strongly constricted at the base, 20-100 per cm², .7-1.4-(2.6) mm in diam.. Margin: Not flexuose, slightly flexuose, or strongly flexuose, persistent or excluded, 60-160 µm wide, epruinose. Disk: Plane to strongly convex, black, epruinose, pruina scarce, without an umbo. Exciple: Hyphae radiating outwards; 2.7-3.3 µm wide; grey; inspersed with crystals. Epithecium: Apical cells olive, green, or rarely turquoise, cell pigment reacting with 10% HCl (in H2O). Hymenium: 45-65 µm high; white; iodine reaction: Lugol’s positive. Subhymenium: 20-50 µm high; white. Hypothecium: Brown. Ascospores: Ellipsoid, (9)-11-12.9-(16) µm long, (4)-4.9-6.2-(7) µm wide; wall not ornamented. Secondary Metabolites: Present, norstictic acid or stictic acid. Spot Tests: Medulla: K –, C –, PD – ascocarp margin (in section): K + red, C – disk: C – hypothecium: K – epihymenium: K –.