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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 brachyspora (Th.Fr.) Nyl.; Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Fries T.M., Lichenogr. Scand. 501 (1874); type specimen label data: Norway, Finmarken, Maasoe, 18 July 1864, Th. Fries (UPS, lectotype).

Taxonomic Literature: Taxonomic notes: A taxon very close to Lecidea auriculata. Fries T.M., Lichenogr. Scand. 501 (1874); Nylander W., Bull. Soc. Linn. Normand., ser. 4, 1: 245 (1887); Hertel H., Mitt. Bot. München 11: 416-418 (1974); Hertel H., Decheniana 127: 63 (1975); Hertel H., Khumbu Himal 6: 238-241 (1977); Hertel H., Mitt. Bot. München 13: 342 (1977); Hertel H., Herzogia 4: 374-375, 396 (1977); Hertel H., Mitt. Bot. München 17: 172 (1981); Inoue M., J. Sci. Hiroshima Univ., Ser. B, Div. 2 (Bot.), 18(1): 28-30 (1982); Clauzade G., Roux C., Bull. Soc. Bot. Centre-Ouest, nouv. ser., num. spec. 7: 463 (1985); Schwab A.J., Mitt. Bot. München 22: 312-314 (1986); Hertel H., Mitt. Bot. München 30: 307 (1991); Hawksworth D.L., Coppins B.J. in Purvis O.W. et al., 324 (1992); Jacobsen P., Mitt. AG Geobotanik in Schleswig-Holstein und Hamburg (Kiel) 42: 46 (1992); Inoue M., J. Hattori Bot. Lab. 76: 190 (1994); Hertel H., Biblioth. Lichenol. 58: 155 (1995).

Biogeography: Colline (sea shore dunes in Br, Ge, Da) and alpine. Continent: Europe (Br, Da, Ge, Is, No, Rs, Sb, Su), Northern America (USA (Alaska), Canada (Saskatchewan)), Southern America (?Venezuela), and Asia-Temperate (Japan).

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

Thallus: Not subdivided parts, continuous throughout, dispersed along the periphery, continuous in the centre, or dispersed throughout and distinctly seperate; lobes angular at the front; separate thallus parts 0-.8 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted. Thallus Outline: Margin concolorous the thallus centre. Upper Surface: White, plane; not sorediate; without thalloconidia thalloconidia.

Ascocarps: Soon sessile, strongly constricted at the base, 7-30 per cm², .8-1.5-(4.5) mm in diam.. Margin: Not flexuose, slightly flexuose, or strongly flexuose, persistent or excluded, 70-100 µm wide, epruinose. Disk: Plane to strongly convex, black, epruinose, without an umbo. Exciple: Hyphae intricately interwoven, with no predominant orientation; 2-4 µm wide; grey or pink (rosé); not inspersed with crystals or inspersed with crystals. Epithecium: Apical cells green or normally turquoise, cell pigment HCl+ blue. Hymenium: 30-50 µm high; white or pale green; iodine reaction: Lugol’s positive. Subhymenium: 10-15 µm high; white or normally pale green. Hypothecium: Brownish yellow or brown.

Ascospores: Subglobose, broadly ellipsoid, or rarely ellipsoid, (3.5)-4.8-7.5-(9.5) µm long, (3)-3.6-4.6-(6) µm wide; wall not ornamented.

Secondary Metabolites: Present, confluentic acid, 2'-O-methylanziaic acid (rarely; Br:1338), or 2'-O-methylperlatolic acid (minor, traces).

Spot Tests: Medulla: K –, C –, PD – ascocarp margin (in section): K – or + bluish red, C – or + red (rarely; Br:1338); disk: C – hypothecium: K – epihymenium: K –.

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