Gymnoderma Nyl. (1860)

Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Döring H. (95-06-02, 00-02-22); revised; to be published after submission.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 3 (A. Aptroot 99-09-27). Gymnoderma. Cladoniaceae Zenker (1827); Cladoniineae; Lecanorales.

Type Information: Type: Gymnoderma coccocarpum Nyl.

Taxonomic Literature: Taxonomic notes: The genus Neophyllis F. Wilson is regarded as distinct from
Gymnoderma. Thus, Gymnoderma consists of 3 species, and is not present in Australia or New Zealand. (Döring H., 00-02-22). Yoshimura I. & Sharp A.J., Americ. J. Botany 55: 635-640 (1968);
Jahns H.M., Nova Hedwigia 20 (1970); Yoshimura I., Jap. Bot. 48: 283-
288 (1973); Verdon D. & Elix J.A., 9: 193-214 (1986).

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

Ecology: Biotroph; lichenized; terricolous, lignicolous, or corticolous.

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

Thallus: Crustose, foliose, or fruticose, not subdivided parts, squamulose, subfruticose, or rimose, lobed. Upper Surface: Green, olive, or brownish yellow; special structures absent. Lower Surface: Attached by the whole lower surface or 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 directly at the tip of the thallus parts, substipitate (short stipes are formed by non-lichenized podetia). Margin: External filaments absent. Exciple: Black, brown, white, or brownish yellow. Epithecium: Apical cells brown or brownish yellow. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: Black, brown, white, or brownish yellow.

Asci: Tholus thickened, amyloid, entirely amyloid throughout; dehiscence lecanoralean.

Ascospores: c. 8 per ascus, ellipsoid or ovoid, 8 µm long, 3 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.

Secondary Metabolites: Not detected or present, of the following substance class(es): ß-orcinol depsidones, (higher) aliphatic acids, and dibenzofurans [and usnic acids].

(report generated 04.Okt.2007)