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Data Set Maintenance: Data set authentic and standard item. Data set author(s): Kainz C. (03-09-11). Data set revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Lecidella. Lecanoraceae Körb. (1855); Lecanorales.

Thallus: Crustose, not subdivided parts, rimose or areolate (primarily areolate); separate thallus parts thin or thick (0.1 - (more than) 1.5 mm). Thallus Outline: Soon disappearing. Upper Surface: Lime green or lemon (citrine), matt or weakly glossy (shiny).

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Soon sessile, strongly constricted at the base, up to 1.5 mm in diam.. Margin: Lecideine/biatorine, excluded, distinct or indistinct (about 0.075 mm). Disk: Plane to rarely strongly convex to weakly convex, black, epruinose or rarely pruinose (pale greyish). Exciple: Not carbonized; white or dark green. Parathecium (proper excipulum): Brownish red, inspersed with crystals (often). Amphithecium (thalline excipulum): Present; photobiont absent. Epithecium: Apical cells distinctly swollen (sometimes), green or dark green. Hymenium: White or pale green (sometimes); inspersed with crystals (sometimes at lower parts). Hypothecium: Brownish yellow (rarely) or brownish red.

Ascospores: c. 8 per ascus, broadly ellipsoid, 9-15 µm long, 5.5-8.5 µm wide; septa absent; wall thick (not halonate), distinctly differentiated into primary and secondary wall (not halonate), not ornamented (not halonate).

Secondary Metabolites: Arthothelin (2,4,5-trichloronorlichexanthone), atranorin, thiophanic acid (= 2,4,5,7-tetrachloronorlichexanthone), thiophaninic acid (= 2,4-Dichloro-6-O-methylnorlichexanthone), or thuringione (= 2,4,5-trichloro-3-O-methylnorlichexanthone), of the following substance class(es): xanthones.

Spot Tests: Upper surface: K – (negative) or + deep yellow (rarely), C + orange, PD – or + yellow (rarely).

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