Geisleria Nitschke (1861)

Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Aptroot A. (95-02-10); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Geisleria. Strigulaceae Zahlbr. (1898); Pyrenulales.

Type Information: Type: Geisleria sychnogonoides Nitschke.

Taxonomic Literature: Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero Special 7: 1-893 [370] (1985); Ernst G., Herzogia 9: 321-337 (1993); Swinscow T.D.V., Lichenologist 3: 418-422 (1967); Poelt J., Bestimmungsschlüssel Europäischer Flechten: 1-757 [296] (1969).

Ecology: Biotroph; lichenized; terricolous or bryophytic.

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

Thallus: Crustose, not subdivided parts, granular or rimose. Upper Surface: Green, 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: Perithecioid, orbicular, forming all across the thallus surface, not emerging, becoming adnate. Margin: External filaments absent. Exciple: White or brownish yellow. Periphyses: Absent. Interascal Hyphae: Present, scarcely branched to distinctly branched.

Asci: Tholus thickened, not amyloid; dehiscence bitunicate.

Ascospores: c. 8 per ascus, ellipsoid, oblong, or fusiform, 17-45 µm long, 7-9 µm wide, obtuse; septa absent or present; transversally septate, 2-5-transversally septate; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed or present.

Secondary Metabolites: Not detected.

(report generated 04.Okt.2007)