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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 (........MUSS NEU!!!!!.......). Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Nylander W., Flora 56: 201 (1873); type specimen label data: France, Dépt. Pyrénées orient., Collioure, 7. July 1872, W. Nylander (H-Nyl 15418, holotype).

Taxonomic Literature: Taxonomic notes: Variability of characters very insufficiently known. Hladun N., Inst. d'estudis Catalans, Arx. Secc. Ciènces 80: 97 (1985); Hertel H., Biblioth. Lichenol. 58: 165 (1995).

Thallus: Areolate (primarily areolate), subsquamulose, continuous throughout or dispersed along the periphery, continuous in the centre; lobes angular or rounded at the front; separate thallus parts.2-.3 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted. Thallus Outline: Margin concolorous the thallus centre. Upper Surface: Grey (with a tinge of olive) or brown (very pale brown), plane or convex; not sorediate; without thalloconidia thalloconidia.

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

Ascocarps: Soon sessile, not constricted or slightly constricted at the base, 25-130 per cm², .8-.9-(1.8) mm in diam.. Margin: Not flexuose or slightly flexuose, persistent or excluded, 50-140 µm wide, epruinose. Disk: Plane to strongly convex, black, epruinose, without an umbo. Exciple: Hyphae radiating outwards; 2.5-4 µm wide; grey or brown; inspersed with crystals. Epithecium: Apical cells olive, cell pigment reacting with 10% HCl (in H2O). Hymenium: 40-(mean: 50-56)-63 µm high; white; iodine reaction: Lugol’s positive. Subhymenium: 12-(mean: 17-21)-27 µm high; white. Hypothecium: Brown.

Ascospores: Ellipsoid, (8.5)-10.2-11.5-(13.5) µm long, (3.5)-3.9-5.1-(6.3) 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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