Schismatomma Flot. & Körb. ex A. Massal. (1852)

Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Scholz P. (02-05-16, 06-12-18); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 9. Schismatomma. Genus of unknown placement (incertae sedis); Arthoniales.

Type Information: Type: Schismatomma pericleum (Ach.) Branth & Rostr.

Taxonomic Literature: Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero
Special 7: 1-893 [706-707] (1985); Ertz D. & Diederich P., Bryol. 109: 415-420 (2006); Galloway D.J., Flora of New Zealand Lichens: i-lxxiii, 1-662 [520-522], Wellington (1985); Hawksworth D.L. in: Purvis O.W. et al. (eds), The Lichen Flora of Great Britain and Ireland, London (1992); Poelt J. & Vezda A., Biblioth. Lichenol. 9: 1-258 [241-243] (1977); Tehler A., Can. J. Bot. 68: 2458-2492 (1990); Tehler A., Opera Bot. 118: 1-38 (1993); Tehler A., Cryptog. Bot. 3: 139-151 (1993); Tehler A.
in: Nash T.H. III et al. (eds) Lichen Flora of the Greater Sonoran
Desert Region vol. 1, 455-457, Tempe (2002); Torrente P. & Egea
J.M., Biblioth. Lichenol. 32: 1-282 (1989).

Biogeography: Checklist records: Austria, Germany, Great Britain, Italy, New Zealand, Sonoran Desert, Sweden and Norway, Thailand, United States and Canada (continental), and Republic of South Africa.

Ecology: Biotroph; lichenized or lichenicolous; corticolous; substrate non-calciferous.

Lichen Photobionts: Primary photobiont absent or present; trentepohlioid. Primary photobiont taxonomy: Trentepohlia; Trentepohliaceae; Trentepohliales, Ulvophyceae, Eukariota. Secondary photobiont absent.

Thallus: Indistinct or crustose, not subdivided parts, leprose, granular, or rimose. Thallus Outline: Soon disappearing or persistent. Upper Surface: White, grey, pink (rosé), or brownish yellow; special structures absent or present:; not pseudocyphellate or pseudocyphellate; eciliate; without hairs; not isidate; not sorediate or sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface; special structures absent; not pseudocyphellate; not cyphellate; not rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose.

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, becoming adnate to soon sessile. Margin: Prominent. Exciple: White, black, brownish yellow, or brown. Epithecium: Apical cells brownish yellow or brown. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White, black, brownish yellow, or brown.

Ascospores: c. 8 per ascus, fusiform, filiform, or curved, 16-40 µm long, 2-5-(5.5) µm wide; septa present; transversally septate, 3-transversally septate; wall thin, not thickened at the septum, hyaline or pale brown, in Lugol's Solution negative, wall not ornamented.

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

Conidia: Bacilliform, filiform, or curved; cell wall hyaline (rarely pale brownish olive-green).

Secondary Metabolites: Present, of the following substance class(es): (higher) aliphatic acids and ß-orcinol depsides.

(report generated 04.Okt.2007)