Gypsoplaca Timdal (1990)

Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Timdal E. (95-04-20); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 1. Gypsoplaca. Gypsoplacaceae Timdal (1990); Lecanorineae; Lecanorales.

Type Information: Type: Gypsoplaca macrophylla (Zahlbr.) Timdal.

Taxonomic Literature: Poelt J. & Gaertner G., Herzogia 9: 229-237 (1992); Timdal E., Biblioth. Lichenol. 38: 419-427 (1990).

Biogeography: Checklist records: Austria and United States and Canada (continental).

Ecology: Biotroph; lichenized; terricolous; substrate calciferous.

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

Thallus: Crustose, not subdivided parts, squamulose or rimose. Upper Surface: Brown or olive; special structures absent. Lower Surface: Attached by holdfasts; special structures absent.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular or irregular, forming all across the thallus surface, not emerging. Margin: Indistinct; external filaments absent. Periphyses: Absent. Epithecium: Apical cells brown. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed. Hypothecium: White.

Asci: Tholus thickened, amyloid; dehiscence lecanoralean.

Ascospores: c. 8 per ascus, ellipsoid, broadly ellipsoid, or globose, 13-17 µm long, 7-10 µm wide, obtuse; septa absent; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

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

Conidiogeneous Cells: Apical. Conidia: Bacilliform or bifusiform.

Secondary Metabolites: Present, of the following substance class(es): (tri-)terpenoids.

(report generated 04.Okt.2007)