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Lecanora jamesii J. R. Laundon

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. & Elix, J.A., Bibl. Lichenol. 53: 19-25 [19-24] (1993); Lumbsch, H.T., Feige, G.B. & Elix, J.A., Bryologist 98: 561-577 [570-572] (1995).

Biogeography: Continent: Africa, Europe, and Southern America.

Ecology: Corticolous.

Thallus: Not subdivided parts, rimose; separate thallus parts thin. Thallus Outline: Indistinct; soon disappearing; white. Upper Surface: Pale grey, pale green, or grey, matt, smooth; epruinose; sorediate; soralia.2-.8-1.4 mm in diam., yellow, isolated, not confluent with other soralia, soredia farinose, 20-20-20 µm in diam..

Ascocarps: Becoming adnate to soon sessile. Margin: Lecanorine, verruculose, smooth, not flexuose, persistent, indistinct to distinct, concolourous with the surrounding thallus or brighter than the surrounding thallus; without a thin rim between disk and thalline margin. Disk: Plane, brownish yellow, epruinose. Parathecium (proper excipulum): White, dissolving in 10% KOH. Amphithecium (thalline excipulum): Present; crystals small, not dissolving in 10% KOH; photobiont abundant. Amphithecial Cortex: Present, indistinct, eucortical, 10-20-30 µm wide, not basally widened, 10-20-30 µm wide at the base; inspersed with oil droplets. Episamma: Soluble in KOH. Epithecium: Apical cells not 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, (8)-8.5-11.5-14.5-(15) µm long, 5.5-6.8-8 µm wide.

Secondary Metabolites: 2-O-methylsulphurellin, atranorin, and usnic acid, of the following substance class(es): orcinol depsides and dibenzofurans [and usnic acids].

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

(report generated 04.Okt.2007)


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