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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (01-06-12). Data set reviewer(s): Kainz C.; revised @EXCL@ not revised (01-09-04); to be published after submission.

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

Type Information: Basionym: Lecidella dimelaenophila Hertel 1977. Khumbu Himal 6(3): 327-330.

Ecology: Biotroph; lichenized or lichenicolous; growing on non-calciferous rock. Host or Phorophyte Taxonomy: Dimelaena, Physciacaeae.

Thallus: Crustose, areolate (primarily areolate); separate thallus parts thick (up to 1.5 mm). Thallus Outline: Soon disappearing. Upper Surface: Lemon (citrine) (to), matt or slightly glossy (shiny), smooth (to strongly wavy).

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Soon sessile, slightly constricted or strongly constricted at the base, up to 1.7 mm in diam.. Margin: Lecideine/biatorine, excluded, distinct or indistinct (0.05 mm). Disk: Plane or strongly convex (when older), black, epruinose. Exciple: Not carbonized; white (partly, if crystals present), dark green, or aeruginose. Parathecium (proper excipulum): White, inspersed with crystals (partly). Amphithecium (thalline excipulum): Present. Epithecium: Apical cells slightly swollen, dark green or turquoise. Hymenium: White. Hypothecium: Pale yellow (if damaged ?) or white.

Ascospores: c. 8 per ascus, ellipsoid, 10-13 µm long, 5.5-7.5 µm wide; septa absent; wall thick (not halonate), distinctly differentiated into primary and secondary wall (not halonate), not ornamented (not halonate).

Secondary Metabolites: 2,5,7-trichloro-3-O-methylnorlichexanthone (Dichlornorlichexanthone in traces), atranorin, chodatin, demethylchodatin, isoarthothelin (= 2,5,7-trichloronorlichexanthone) (in traces), thiophanic acid (= 2,4,5,7-tetrachloronorlichexanthone), 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, C – or + orange, PD – or + yellow.

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