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Laurera Rchb. (1841)

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

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 35. Laurera. Trypetheliaceae Zenker (1927); Pyrenulales.

Type Information: Type: Laurera varia Zahlbr., nom. illeg.

Taxonomic Literature: Aptroot A., Diederich P., Sérusiaux E. & Sipman H.J.M., Biblioth. Lichenol. 64: 1-220 [75] (1997); Galloway D.J., Flora of New Zealand Lichens: i-lxxiii, 1-662 [203-205], Wellington (1985); Harris R.C., Acta Americana Suppl. 14: 55-80 (1986); Letrouit-Galinou M.-A., Rev. Bryol. Lichénol. 26: 207-264 (1957); Letrouit-Galinou M.-A., Rev. Bryol. Lichénol. 27: 66-73 (1958); McCarthy P.M., Lichenologist 27: 310-314 (1995); McCarthy P.M. & Kantvilas G. Lichenologist 25: 51-55 (1993); Makhija U. & Patwardhan P.G., Mycotaxon 31: 565-590 (1988); Upreti D.K. & Singh A., Bull. Jard. Bot. Nat. Belgique 57: 367-383 (1987).

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

Ecology: Biotroph; lichenized; corticolous.

Lichen Photobionts: Primary photobiont present; trentepohlioid. Secondary photobiont absent.

Thallus: Indistinct or crustose, not subdivided parts, granular or rimose. Upper Surface: Brown, grey, or olive; special structures absent or present:; not pseudocyphellate or pseudocyphellate; eciliate; without hairs; not isidate or isidiate; not sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. 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: Orbicular, forming all across the thallus surface, not emerging, becoming adnate to soon sessile, stromatic. Wall: Carbonized only in parts, not fused. Margin: Indistinct to distinct; external filaments absent. Exciple: Black or brown. Periphyses: Absent. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed. Hypothecium: Black or brown.

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

Ascospores: 1–2 to c. 8 per ascus, ellipsoid, oblong, oblong-obtuse, ovoid, fusiform, or semilunate, 45-300 µm long, 7-90 µm wide, obtuse or aciculate; septa present; both transversally and longitudinally, 10-50-transversally septate, formed by the endospore wall layer; wall thin or thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, hyaline or pale brown, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed or present; pycnidial.

Conidia: Bacilliform.

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

(report generated 04.Okt.2007)

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