Arctopeltis Poelt (1983)

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: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 1. Arctopeltis. Lecanoraceae Körb. (1855); Lecanorineae; Lecanorales.

Type Information: Type: Arctopeltis thuleana Poelt.

Taxonomic Literature: Poelt, J., Int. J. Mycol. Lichenol. 1: 143-160 (1983).

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

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

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

Thallus: Foliose, not subdivided parts, umbilicate. Upper Surface: Brown, brownish yellow, or white; 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, forming all across the thallus surface, soon sessile. Margin: Distinct to prominent; external filaments absent. Exciple: White. Periphyses: Absent. Epithecium: Apical cells brown, green, grey, brownish yellow, or olive. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White.

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

Ascospores: c. 8 per ascus, ellipsoid or oblong, 9-14 µm long, 4-6 µm wide, obtuse; septa absent; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

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

Conidiogeneous Cells: Apical. Conidia: Filiform.

Secondary Metabolites: Present, of the following substance class(es): xanthones.

(report generated 04.Okt.2007)