Sagema Poelt & Grube (1993)

Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 1. Sagema. Lecanoraceae Körb. (1855); Lecanorineae; Lecanorales.

Type Information: Type: Sagema potentillae Poelt & Grube.

Taxonomic Literature: Grube M. & Poelt J., Graphis Scripta 5: 69-72 (1993).

Ecology: Biotroph; lichenized; lignicolous or corticolous.

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

Thallus: Indistinct or crustose, not subdivided parts, granular. Upper Surface: Grey or white; 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, soon sessile. Margin: Prominent; external filaments absent. Exciple: White. Periphyses: Absent. Epithecium: Apical cells brownish yellow. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White.

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

Ascospores: c. 8 per ascus, ellipsoid or broadly ellipsoid, 30-40 µm long, 15-21 µm wide, obtuse; septa absent; wall thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed or present.

Secondary Metabolites: Present, of the following substance class(es): (tri-)terpenoids and dibenzofurans [and usnic acids].

(report generated 04.Okt.2007)