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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 gneissicola Zahlbr.; Lecidea saxosa R. Anderson; Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Zahlbruckner A., Verh. Zool.-Bot. Ges. Wien 68: 10 (1918); type specimen label data: Austria, Niederösterreich, Wechsel SE Mürzzuschlag, Hoher Umschuß, 1730 m, 16 May 1869, H. Lojka 267 (W, holotype).

Taxonomic Literature: Taxonomic notes: Very close to Lecidea atrobrunnea.. Hertel H., Herzogia 2: 49-50 (1970); Türk R., Poelt J., Österr. Akad. Wiss., Biosystematics and Ecology Ser. 3: 65 (1993 - bibliography of Austrian lichens); Hertel H., Biblioth. Lichenol. 58: 174 (1995).

Biogeography: Montane and alpine. Continent: Europe (Au, Is, Hs, Rs, Sb) and Northern America (Greenland, Canada (Alberta, Yukon), USA (Colorado, Washington)).

Thallus: Areolate (primarily areolate), subsquamulose (weakly), continuous throughout, dispersed along the periphery, continuous in the centre, or dispersed throughout and distinctly seperate; lobes angular or rounded at the front; separate thallus parts.3-1.1 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted to basally constricted. Thallus Outline: Margin concolorous to brighter than disk the thallus centre. Upper Surface: Brownish yellow to brown (usually pale brown or yellowish brown), plane to convex; not sorediate; without thalloconidia thalloconidia.

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

Ascocarps: Soon sessile, slightly constricted to strongly constricted at the base, 7-60 per cm², .8-1.5-(3.3) mm in diam.. Margin: Not flexuose to slightly flexuose, persistent to excluded, indistinct, 40-120 µm wide, epruinose. Disk: Plane to weakly convex to strongly convex, black, epruinose, pruina scarce, without an umbo. Exciple: Paraplectenchymatous, hyphae radiating outwards; 3.5-5 µm wide; grey; inspersed with crystals. Epithecium: Apical cells olive to green, cell pigment reacting with 10% HCl (in H2O), cell pigment HCl+ blue. Hymenium: 45-67 µm high; white; iodine reaction: Lugol’s positive. Subhymenium: 17-43 µm high; white. Hypothecium: Brownish yellow to brown.

Ascospores: Ellipsoid to oblong, (6)-7.5-12-(15.5) µm long, (3)-3.2-5.1-(7.5) µm wide; wall not ornamented.

Spot Tests: Medulla: K + red, C –, PD – to + deep yellow; ascocarp margin (in section): K + red, C – disk: C – hypothecium: K – epihymenium: K –.

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