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Trypethelium Spreng. (1804)

Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Aptroot A. (95-02-10, 95-02-18); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 100. Trypethelium. Trypetheliaceae Zenker (1927); Pyrenulales.

Type Information: Type: Trypethelium eluteriae Spreng.

Taxonomic Literature: Aptroot A., Diederich P., Sérusiaux E. & Sipman H.J.M.,
Biblioth. Lichenol. 64: 1-220 [207-208] (1997); Galloway D.J., Flora
of New Zealand Lichens: i-lxxiii, 1-662 [587-588], Wellington (1985);
Harris R.C., Mich. Bot. 12: 3-68 (1973); Harris R.C., Acta Amazonica,
Suppl. 14: 55-80 (1986); Makhija U. & Patwardhan, P.G., J.
Hattori Bot. Lab. 73: 183-219 (1993).

Biogeography: Checklist records: Guianas, New Guinea, New Zealand, Thailand, United States and Canada (continental), and Republic of South Africa.

Ecology: Biotroph; lichenized; corticolous.

Lichen Photobionts: Primary photobiont present; trentepohlioid. Primary photobiont taxonomy: Trentepohlia (A. Beck 22-05-97); Trentepohliaceae; Trentepohliales, Ulvophyceae, Eukariota. Secondary photobiont absent.

Thallus: Crustose. Upper Surface: Green, brown, brownish yellow, or orange; special structures absent. Lower Surface: Attached by the whole lower surface; special structures absent.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Perithecioid, orbicular, forming all across the thallus surface, not emerging, stromatic. Wall: Carbonized only in parts, not fused. Margin: Indistinct; external filaments absent. Exciple: White, brownish yellow, or orange. Periphyses: Absent. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed.

Asci: Tholus thickened, not amyloid; ocular chamber broad; dehiscence bitunicate.

Ascospores: c. 8 per ascus, fusiform, oblong-obtuse, or oblong, 12-240 µm long, 6-35 µm wide, aciculate; septa present; transversally septate, 3-20-transversally septate, formed by the endospore wall layer; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

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

Conidia: Bacilliform.

Secondary Metabolites: Not detected or present, of the following substance class(es): (anthra-)quinones and xanthones.

(report generated 04.Okt.2007)

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