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Lecanora aleutica H. Magn.

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: Brodo, I.M., Beih. Nova Hedwigia 79: 63-169 [103] (1984).

Biogeography: Continent: Northern America.

Ecology: Substrate non-calciferous.

Thallus: Rimose or areolate (primarily areolate), bullate; separate thallus parts thick. Thallus Outline: Indistinct; soon disappearing; white. Upper Surface: Verrucose or verruculose, lemon (citrine), matt, smooth; epruinose; not sorediate.

Ascocarps: Strongly constricted at the base. Margin: Lecanorine, smooth, not flexuose, persistent or excluded, prominent or distinct, concolourous with the surrounding thallus; with a thin, inner rim visible between disk and thalline margin. Disk: Plane, brownish red, epruinose, pruina scarce. Parathecium (proper excipulum): White, not inspersed with crystals. Amphithecium (thalline excipulum): Present; crystals small, abundant, dissolving in 10% KOH; photobiont abundant. Amphithecial Cortex: Present, indistinct, eucortical, (35)-40-50-60 µm wide, basally widened, (50)-60-80-100 µm wide at the base; inspersed with oil droplets. Episamma: Without episamma. Epithecium: Apical cells slightly swollen, brownish red, insoluble in 10% KOH. Hymenium: Not inspers. Hypothecium: White; not inspers.

Ascospores: c. 8 per ascus, broadly ellipsoid, (9.5)-10-12-14.5-(15) µm long, (6)-6.5-7-8.5-(9) µm wide; wall thick, distinctly differentiated into primary and secondary wall, not ornamented.

Secondary Metabolites: Atranorin and hopane-6a,22-diol, of the following substance class(es): orcinol depsides and (tri-)terpenoids.

Spot Tests: Upper surface: C –, PD –.

(report generated 04.Okt.2007)


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