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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: Lecidea venustula Arnold; Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Nylander W., Flora 57: 12 (1874); type specimen label data: France, Dépt. Basses Pyrénées, Lac d'Estaes bei Urdos, 5 July 1870, J. Richard 300 (H-Nyl 16293, holotype).

Taxonomic Literature: Hertel H., Beih. Nova Hedwigia 24: 43-45 (1967); Hertel H., Herzogia 2: 234 (1971); Hertel H., Khumbu Himal 6: 241-243 (1977); Clauzade G., Roux C., Bull. Soc. Bot. Centre-Ouest, nouv. ser., num. spec. 7: 464 (1985); Andreev M.P., Kudratov I., Botan. Zhurn. 77: 104-105 (1992); Hertel H., Biblioth. Lichenol. 58: 157 (1995).

Biogeography: Alpine. Continent: Europe (Au, Ga, It) and Asia-Temperate (Kirgisia).

Thallus: Rarely not subdivided parts, areolate (primarily areolate), continuous throughout; lobes angular at the front; separate thallus parts.3-.7 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted. Thallus Outline: Margin concolorous the thallus centre. Upper Surface: White or grey (very pale), plane; not sorediate; without thalloconidia thalloconidia.

Ascocarps: Soon sessile, slightly constricted or strongly constricted at the base, 40-150 per cm², .7-1-(1.8) mm in diam.. Margin: Not flexuose or slightly flexuose, persistent, 35-90 µm wide, epruinose. Disk: Plane, weakly convex, or strongly convex, black, epruinose, pruina scarce, without an umbo. Exciple: Hyphae radiating outwards; 3-4 µm wide; grey or pink (rosé); inspersed with crystals. Epithecium: Apical cells olive or green, cell pigment reacting with 10% HCl (in H2O). Hymenium: (45)-55-70-(77) µm high; white or pale green; iodine reaction: Lugol’s positive. Subhymenium: 13-(mean: 20)-45 µm high; white. Hypothecium: Brown.

Ascospores: Ellipsoid or oblong, (9)-11-12.7-(17) µm long, (4)-5-6-(7.5) µm wide; wall not ornamented.

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

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