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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 paupercula f. infirmata (Arnold) Lettau, Feddes Repert. 56: 211 (1954); Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Arnold F., Verh. Zool.-Bot. Ges. Wien 37: 112 (1887); type specimen label data: Italy, Prov. Trento: an Porphyrblöcken des Berges rechts ober der Alpe Giuribrutt bei Paneveggio, 2520 m. 4 August 1880, F. Arnold (Arnold, Lich. Exs. 844: M, lectotype).

Taxonomic Literature: Taxonomic notes: Variability of characters insufficiently known. Hertel H., Decheniana 127: 67-68 (1975); Hertel H., Biblioth. Lichenol. 58: 160 (1995).

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

Thallus: Not subdivided parts, dispersed along the periphery, continuous in the centre or dispersed throughout and distinctly seperate; lobes angular at the front; separate thallus parts.1-.2 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted. Thallus Outline: Margin concolorous or brighter than disk the thallus centre. Upper Surface: Lemon (citrine), brownish yellow, grey, or brown (pale beige), plane; not sorediate; without thalloconidia thalloconidia.

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

Ascocarps: Soon sessile, slightly constricted at the base, 50-100 per cm², .7-.8-(1.4) mm in diam.. Margin: Not flexuose, persistent or excluded, 50-90 µm wide, epruinose. Disk: Plane to weakly convex, black, epruinose, without an umbo. Exciple: Hyphae radiating outwards; grey. Epithecium: Apical cells green or turquoise, cell pigment reacting with 10% HCl (in H2O). Hymenium: 45-60 µm high; white; iodine reaction: Lugol’s positive. Subhymenium: 0-35 µm high; white or pale green. Hypothecium: White.

Ascospores: Ellipsoid, (8)-9.8-10.7-(13) µm long, (4)-5.2-6-(7) 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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