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Lecanora albellula Nyl.

Data Set Maintenance: Data set authentic and standard item. Data set author(s): Knoph J.-G., Rambold G. & Triebel D. (Printzen C.). Data set reviewer(s): Kainz C. (Printzen C.); not to be published after submission; 31.12.2001.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: species. Lecanora. Synonyms: Lecanora piniperda Körb. nom. illeg., Lecanora ochromma Nyl., Lecanora cembricola Nyl., Lecanora effusella Hedl.; Lecanoraceae Körb. (1855); Lecanorineae; Lecanorales.

Taxonomic Literature: Printzen, C. Corticolous and lignicolous species of Lecanora (Lecanoraceae, Lecanorales) with usnic or isousnic acid in the Sonoran Desert region. submitted.

Biogeography: Continent: Europe and Northern America.

Ecology: Biotroph; lichenized; lignicolous or corticolous.

Thallus: Indistinct or crustose, not subdivided (often endosubstratal) parts, granular or areolate (primarily areolate); separate thallus parts thin. Thallus Outline: Simple; soon disappearing or persistent; white. Upper Surface: Verruculose, grey (beige), lime green, or brownish yellow, matt, smooth; special structures absent; epruinose; not wrinkled. Lower Surface: Special structures absent; not rhizinate.

Medulla: Iodine reaction in Lugol's solution negative.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Soon sessile, slightly constricted at the base, .35-.4 mm in diam.. Margin: Lecanorine, verruculose, smooth or rough, not flexuose or slightly flexuose, persistent or excluded, indistinct to distinct to when young prominent, concolourous with the surrounding thallus; without a thin rim between disk and thalline margin. Disk: Plane to weakly convex to rarely strongly convex, brownish yellow to brownish red, pruinose, pruina scarce, without an umbo. Exciple: White to brownish yellow. Amphithecium (thalline excipulum): Present; (50)-(80) µm wide; crystals small, abundant, dissolving in 10% KOH; photobiont sparse to abundant. Amphithecial Cortex: Present, indistinct, (10)-(20) µm wide, (10)-(20) µm wide at the base. Episamma: With episamma; soluble in KOH. Epithecium: Apical cells slightly swollen, hyaline or rarely olive or brown (sordid greenish) or brownish red, soluble in 10% KOH. Hymenium: White; rarely oil inspersed or small inspersed with crystals (from epihymenium). Hypothecium: White; not inspers. Hypothecial Extension: Absent.

Ascospores: c. 8 per ascus, broadly ellipsoid or ellipsoid, (7)-8.7-10.8-(12.5) µm long, (3.5)-4.1-4.8-(5.5) µm wide, obtuse; septa absent; wall thin, not ornamented.

Secondary Metabolites: Usnic acid.

(report generated 04.Okt.2007)

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