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Physconia template_01

Data Set Maintenance: Data set compiled (from Sonoran Desert Lichen Flora Vol.1). Data set author(s): Bungartz F. (02-03-22). Data set to be published after submission; February 2002.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Currently accepted name Physconia spec. Physconia. Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Type Information: Basionym: Physconia spec. Type: Physconia spec.

Ecology: Episubstratic.

Thallus: Foliose, subdivided into main parts, lobed. Thallus Size and Differentiation: Small or medium-sized. Thallus Outline: Soon disappearing. Upper Surface: Grey, dark brown, or brownish red, matt, smooth; immaculate; pruinose (on at least part of the thallus); pruina scarce or abundant; greyish or whitish; continuous or patchy, in the centre or at periphery; hairy (in one species); hairs marginal. Lower Surface: Present, black in the centre, black (paler in the center) or grey along the margin; attached by holdfasts (true rhizines); rhizinate; rhizines moderately abundant or abundant, black (at least at the tips) or grey, branched (one species with simple to sparsely furcate rhizines), squarrosely branched or sparsely furcate (in one species); not tomentose.

Upper Cortex: Present; outer cortical layer paraplectenchymatous; inner cortical layer prosoplectenchymatous. Lower Cortex: Present.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, soon sessile. Margin: Lecanorine, persistent, distinct. Disk: Plane; black or brown. Amphithecium (thalline excipulum): Present; photobiont sparse or abundant.

Asci: Clavate; dehiscence lecanoralean.

Ascospores: Physconia-type (at maturity), c. 8 per ascus, spores 8 per ascus, ellipsoid; septa present; transversally septate; 1-transversally septate; forming early during spore ontogeny (Physciaceae-type A); lumina of equal size; wall apically not thickened, subapically not thickened, thickened at the septum, becoming pigmented, dark brown (at maturity) or middle brown, ornamented (finely warted), rugulate (not rugulate, finely warted (= granulate)).

Conidiomata: Present.

Conidia: Short cylindrical or bacilliform; 4-6 µm long; 1 µm wide.

(report generated 13.Nov.2007)

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