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Lecanora mayrhoferi Lumbsch

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., J. Hattori Bot. Lab 77: 1-175 [110-112] (1994).

Biogeography: Continent: Australasia.

Ecology: Substrate non-calciferous.

Thallus: Areolate (primarily areolate); separate thallus parts thin. Thallus Outline: Indistinct; soon disappearing. Upper Surface: Verrucose or verruculose, lemon (citrine) or pale grey, matt, smooth; epruinose; not sorediate.

Ascocarps: Soon sessile. Margin: Lecanorine, smooth, not flexuose or slightly flexuose, persistent, distinct to prominent, concolourous with the surrounding thallus; with a thin, inner rim visible between disk and thalline margin. Disk: Plane, dark brown, epruinose, pruina scarce. Parathecium (proper excipulum): White, dissolving in 10% KOH. Amphithecium (thalline excipulum): Present; crystals small, abundant, dissolving in 10% KOH; photobiont abundant. Amphithecial Cortex: Present, indistinct, eucortical, 15-20-25 µm wide, not basally widened, 15-20-25 µm wide at the base; inspersed with oil droplets. Episamma: Soluble in KOH. Epithecium: Apical cells slightly swollen or distinctly swollen, olive, dark brown, or dark green, cell pigment reacting with 10% KOH. Hymenium: Not inspers. Hypothecium: White; not inspers.

Ascospores: c. 8 per ascus, ellipsoid, (11)-11.5-13-14.5-(15) µm long, (4)-4.5-5.5-6.5-(7) µm wide; wall thin, not ornamented.

Conidiomata: Immersed.

Pycnidia: Cerebriform. Conidiophores: Vobis-type II. Conidia: Filiform; 14-16.5-19 µm long.

Secondary Metabolites: 2,5,7-trichloro-3-O-methylnorlichexanthone, atranorin, and isoarthothelin (= 2,5,7-trichloronorlichexanthone), of the following substance class(es): orcinol depsides and xanthones.

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

(report generated 04.Okt.2007)


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