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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 atroocarpoides Vain., Lecidea kittilensis Vain.; Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Fries T.M., Lichenogr. Scand. 482-483 (1974); type specimen label data: Norway, Troms: ad partem borealem insula Tromsoe, J.M. Norman 377 (O, lectotype).

Taxonomic Literature: Taxonomic notes: very close to Lecidea praenubila. Fries T.M., Lichenogr. Scand. 482-483 (1974); Vainio E.A., Acta Soc. Fauna Fl. Fenn. 57(2): 99-101 (1934); Nowak J., Tobolewski Z., Porosty Polskie (Warszawa & Kraków) 545 (1975); Hertel H., Khumbu Himal 6: 265-268 (1977); Hertel H., Herzogia 5: 454-455 (1981); Makarevich M.F., Navrozkaja I.L., Judina I.V., Atlas Geogr. Rasprost. Lishainikov v Ukrainsk. Karpat. 128-129 (Kiev 1982); Clauzade G., Roux C., Bull. Soc. Bot. Centre-Ouest, nouv. ser., num. spec. 7: 458 (1985); Andreev M.P., Antonova I.M., Novit. Syst. Plant. Non Vasc. 26: 97 (1989); Hawksworth D.L., Coppins B.J. in Purvis O.W. et al. 328 (1992); Hertel H., Biblioth. Lichenol. 58: 165 (1995).

Biogeography: Montane and alpine. Continent: Europe (Br, Fe, Is, No, Rs, Sb, Su), Northern America (Greenland, Canada, Alaska), and Asia-Temperate (?Japan).

Ecology: Biotroph; lichenized; episubstratic; substrate non-calciferous or metalliferous.

Thallus: Areolate (primarily areolate), 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.15-.4 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted. Thallus Outline: Margin concolorous the thallus centre. Upper Surface: Brown, plane; not sorediate; without thalloconidia thalloconidia.

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

Ascocarps: Forming on the pro- or hypothallus, rarely soon sessile, not constricted to slightly constricted at the base, 5-100 per cm², .5-.9-(2) mm in diam.. Margin: Not flexuose, persistent to excluded, 45-90 µm wide, epruinose. Disk: Plane to weakly convex to strongly convex, black, epruinose, without an umbo. Exciple: Hyphae radiating outwards; 3.5-5 µm wide; grey; not inspersed with crystals to inspersed with crystals. Epithecium: Apical cells olive to green to turquoise, cell pigment reacting with 10% HCl (in H2O), cell pigment HCl+ blue. Hymenium: 53-84 µm high; white; iodine reaction: Lugol’s positive. Subhymenium: 17-40 µm high; white. Hypothecium: Brown.

Ascospores: Oblong, (7)-9.2-16.2-(19) µm long, (4.8)-5.4-7.8-(8.5) µm wide; wall not ornamented.

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

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