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Pleurosticta Petr. (1931)

Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Elix J. A. (95-06-01); revised; to be published after submission.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 2 (A. Aptroot 99-09-27). Pleurosticta. Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Type Information: Type: Pleurosticta acetabulum (Neck.) Elix & Lumbsch.

Taxonomic Literature: Hafellner J., Nova Hedwigia 56: 281-305 (1993); Lumbsch H.T., Kothe H.W. & Elix J.A., Mycotaxon 33: 447-455 (1988).

Biogeography: Checklist records: Austria, Germany, Italy, and Sweden and Norway.

Ecology: Biotroph; lichenized; corticolous.

Lichen Photobionts: Primary photobiont present; chlorococcal. Primary photobiont taxonomy: Trebouxia (A. Beck 22-05-97); Trebouxiaceae; Trebouxiales, Trebouxiophyceae, Eukariota. Secondary photobiont absent.

Thallus: Foliose, not subdivided parts, lobed. Thallus Outline: Soon disappearing. Upper Surface: Brown; special structures absent. Lower Surface: Attached by holdfasts; special structures present:; not pseudocyphellate; not cyphellate; rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, forming all across the thallus surface, soon sessile. Margin: Prominent; external filaments absent. Exciple: Grey or white. Periphyses: Absent. Epithecium: Apical cells brown or brownish yellow. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White.

Asci: Tholus thickened, amyloid, with non-amyloid wide axial body and divergent amyloid flanks towards apex; dehiscence lecanoralean.

Ascospores: c. 8 per ascus, ellipsoid, 12-16 µm long, 6-11 µm wide, obtuse; septa absent; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed or present; pycnidial; immersed, formed all accross the thallus surface.

Conidia: Bacilliform or fusiform.

Secondary Metabolites: Present, of the following substance class(es): ß-orcinol depsidones.

(report generated 04.Okt.2007)


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