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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: basionymous or accepted. Taxonomic rank: species. Lecidea. Synonyms:-; Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Hertel H., Rambold G. in Hertel H., Biblioth. Lichenol. 58: 169, 1995; type specimen label data: Iceland, Strandasysla: Am Bergrücken Lambafell, 65 26'33"N, 21 38'20"W, c. 0.5 km W Krossárvatn, 250 m alt., 24 July 1979, H. Hertel 23094 (M, holotype; ICEL, isotype).

Ecology: Biotroph; lichenized; endosubstratic or episubstratic (traces); substrate non-calciferous.

Thallus: Not subdivided parts, continuous throughout, dispersed along the periphery, continuous in the centre, or dispersed throughout and distinctly seperate; lobes angular at the front; separate thallus parts 0-.2 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.

Ascocarps: Soon sessile, slightly constricted or strongly constricted at the base, 10-100 per cm², .6-1.2-(2.7) mm in diam.. Margin: Not flexuose or slightly flexuose, persistent or excluded, 35-110 µm wide, epruinose. Disk: Plane to weakly convex to rarely strongly convex, black, epruinose, without an umbo. Exciple: Hyphae radiating outwards; 3-5 µm wide; grey or rarely pink (rosé); not inspersed with crystals or inspersed with crystals. Epithecium: Apical cells olive, green, turquoise, or rarely brown, cell pigment reacting with 10% HCl (in H2O). Hymenium: 40-(mean: 48)-60-(70) µm high; white; iodine reaction: Lugol’s positive. Subhymenium: 8-45 µm high; white or rarely pale green. Hypothecium: Brownish yellow or brown.

Ascospores: Ellipsoid, (7.5)-8.2-11.8-(16) µm long, (2.7)-2.8-4.4-(5.5) µm wide; wall not ornamented.

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

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