Hafellia Kalb, H. Mayrhofer & Scheid. (1986)

Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Matzer M. & Mayrhofer H. (95-01-15); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 5. Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Type Information: Type: Hafellia leptoclinoides (Nyl.) Scheid. & H. Mayrhofer.

Taxonomic Literature: Pusswald W., Kantvilas G. & Mayrhofer H., Muelleria 8: 133-140
(1994); Rambold G., Mayrhofer H. & Matzer M., Pl. Syst. Evol.
192: 31-40 (1994); Scheidegger Ch., Lichenologist 25: 315-364 (1993);
Sheard J.W., Bryologist 95: 79-87 (1992).

Biogeography: Checklist records: Great Britain, Guianas, Italy, United States and Canada (continental), and Republic of South Africa.

Ecology: Biotroph; lichenized; lignicolous or corticolous; substrate non-calciferous.

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

Thallus: Crustose, not subdivided parts, granular or rimose. Upper Surface: Grey, white, or brownish yellow; 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: Apothecioid, orbicular, forming all across the thallus surface, soon sessile. Margin: Prominent; external filaments absent. Exciple: Black or brown. Periphyses: Absent. Epithecium: Apical cells grey, green, brown, or olive. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: Black or brown.

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

Ascospores: 1–2 to 16-32 per ascus, broadly ellipsoid, ellipsoid, or fusiform, 14-41.5 µm long, 6.5-21 µm wide, obtuse or aciculate; septa present; transversally septate, 1-3-transversally septate; wall thin, thickened at the septum, dark brown or pale brown, in Lugol's Solution negative, wall not ornamented or ornamented.

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

Conidia: Bacilliform.

Secondary Metabolites: Present, of the following substance class(es): orcinol depsidones, ß-orcinol depsides, ß-orcinol depsidones, and dibenzofurans [and usnic acids].

(report generated 04.Okt.2007)