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Data Set Maintenance: Data set standard item. Data set author(s): Hertel H. (99-01-01). Data set not revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Lecidea. Lecideaceae Chevall. (1826); Lecanorales.

Taxonomic Literature: Taxonomic notes: Variability of characters very insufficiently known. Very near to Lecidea atrobrunnea. The Lecidea atrobrunnea complex is at present under study by H. Hertel and Ch. Leuckert. Hertel H., Biblioth. Lichenol. 58: 164 (1995).

Ecology: Biotroph; lichenized; episubstratic; substrate non-calciferous or calciferous (slightly calciferous rock).

Thallus: Areolate (primarily areolate), continuous throughout or dispersed along the periphery, continuous in the centre; lobes angular or rounded at the front; separate thallus parts.4-1.1 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted. Upper Surface: Brown, convex; not sorediate; without thalloconidia thalloconidia.

Upper Cortex: Epicortex present. Medulla: Iodine reaction in Lugol's solution positive.

Ascocarps: Soon sessile, slightly constricted at the base, 10-40 per cm², .9-1.5-(2.2) mm in diam.. Margin: Not flexuose, slightly flexuose, or strongly flexuose, persistent, 30-55 µm wide, epruinose. Disk: Weakly convex to strongly convex, black, epruinose, without an umbo. Exciple: Hyphae radiating outwards; 3-5 µm wide; grey; inspersed with crystals. Epithecium: Apical cells green or turquoise, cell pigment HCl+ blue. Hymenium: 45-62 µm high; white to pale green; iodine reaction: Lugol’s positive. Subhymenium: 25-45 µm high; white. Hypothecium: Brownish yellow to brown.

Ascospores: Oblong, (7)-9.8-10.7-(13) µm long, (3.1)-3.5-4.3-(5) µm wide; wall not ornamented.

Spot Tests: Medulla: K –, C –, PD – ascocarp margin (in section): K –, C – disk: C – hypothecium: K – epihymenium: K –.

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