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Lecanora sanctae-helenae Müll. Arg.

Data Set Maintenance: Data set standard item. Data set author(s): Lumbsch H. T. & Guderley R. (98-09-01). Data set to be published after submission; 98-09-01.

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

Taxonomic Literature: Dickhäuser, A., Lumbsch, H.T. & Feige, G.B., Mycotaxon 56: 303-323 [316-317] (1995).

Biogeography: Continent: Africa.

Ecology: Substrate non-calciferous.

Thallus: Rimose or areolate (primarily areolate); separate thallus parts thick. Thallus Outline: Indistinct; soon disappearing. Upper Surface: Verrucose or verruculose, pale grey or pale brown, matt, smooth; pruina scarce; not sorediate.

Ascocarps: Soon sessile, not constricted at the base. Margin: Lecanorine, smooth, not flexuose, persistent, prominent, concolourous with the surrounding thallus; without a thin rim between disk and thalline margin. Disk: Plane to weakly convex, pink (rosé), pruina abundant. Parathecium (proper excipulum): White, not dissolving in 10% KOH. Amphithecium (thalline excipulum): Present; crystals small, abundant, dissolving in 10% KOH; photobiont abundant. Amphithecial Cortex: Absent, indistinct, pseudocortical, (20)-25-30-35 µm wide, not basally widened, (20)-25-30-35 µm wide at the base; inspersed with oil droplets. Episamma: Soluble in KOH. Epithecium: Apical cells slightly swollen, hyaline or dark brown, soluble in 10% KOH. Hymenium: Not inspers. Hypothecium: White; not inspers.

Ascospores: c. 8 per ascus, broadly ellipsoid, 9-11-12-(12.5) µm long, (4.5)-5-6-7 µm wide; wall thin, not ornamented.

Secondary Metabolites: Atranorin, placodiolic acid, protocetraric acid, and salazinic acid, of the following substance class(es): orcinol depsides, orcinol depsidones, and dibenzofurans [and usnic acids].

Spot Tests: Upper surface: C –, PD + orange.

(report generated 04.Okt.2007)


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