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Lecanora achroa Nyl.

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: accepted or basionymous. Taxonomic rank: species. Lecanora. Lecanoraceae Körb. (1855).

Taxonomic Literature: Lumbsch, H.T., Feige, G.B. & Elix, J.A., Bryologist 98: 561-577 [563-565] (1995).

Biogeography: Continent: Africa, Australasia, Northern America, Southern America, and Pacific.

Ecology: Lignicolous or corticolous.

Thallus: Not subdivided parts, rimose; separate thallus parts thin. Thallus Outline: Indistinct; black. Upper Surface: Lemon (citrine), lime green, or pale green, matt, smooth; epruinose; not sorediate.

Ascocarps: Soon sessile. Margin: Lecanorine, verruculose, smooth, not flexuose, persistent or excluded, indistinct to prominent, concolourous with the surrounding thallus; without a thin rim between disk and thalline margin. Disk: Plane to weakly convex, brownish yellow, epruinose, pruina scarce. Parathecium (proper excipulum): White, not dissolving in 10% KOH. Amphithecium (thalline excipulum): Present; crystals small, not dissolving in 10% KOH; photobiont abundant. Amphithecial Cortex: Present, distinctly developed, eucortical, 15-25-35-(40) µm wide, not basally widened, 15-25-35-(40) µm wide at the base; inspersed with oil droplets. Episamma: Soluble in KOH. Epithecium: Apical cells slightly swollen, hyaline or brownish red, soluble in 10% KOH. Hymenium: Not inspers. Hypothecium: White; not inspers.

Ascospores: c. 8 per ascus, ellipsoid or broadly ellipsoid, 10.5-14.5-16.5 µm long, 6.5-7.5-8.5 µm wide; wall thin, not ornamented.

Secondary Metabolites: Atranorin, usnic acid, 2'-O-methylperlatolic acid, and arthothelin (2,4,5-trichloronorlichexanthone), of the following substance class(es): orcinol depsides, dibenzofurans [and usnic acids], xanthones, and (tri-)terpenoids.

Spot Tests: Upper surface: C –, PD –.

(report generated 04.Okt.2007)


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