Chiodecton Ach. (1814)

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: 16. Chiodecton. Genus of unknown placement (incertae sedis); Arthoniales.

Type Information: Type: Chiodecton sphaerale Ach.

Taxonomic Literature: Aptroot A., Diederich P., Sérusiaux E. & Sipman H.J.M.,
Biblioth. Lichenol. 64: 1-220 [49-51] (1997); Clauzade G. & Roux
C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero Special 7: 1-893 [288-
289] (1985); Galloway D.J., Flora of New Zealand Lichens: i-lxxiii, 1-
662 [91-92], Wellington (1985); Henssen A. & Thor G., Nord. J.
Bot. 18: 95-120 (1998); James P.W., Lichenologist 4: 309-322 (1970);
Kantvilas G. & Thor G., Papers and Proc. of the Royal Soc. of
Tasmania 127: 39-41 (1993); Purvis O.W. & James P.W. in: Purvis
O.W. et al. (eds), The Lichen Flora of Great Britain and Ireland,
London (1992); Tehler A., Can. J. Bot. 68: 2458-2492 (1990); Thor G.,
Opera Bot. 103: 1-92 (1990); Torrente P. & Egea J.M., Biblioth.
Lichenol. 32: 1-282 (1989).

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

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

Lichen Photobionts: Primary photobiont present; trentepohlioid. Primary photobiont taxonomy: Trentepohlia (A. Beck 22-05-97); Trentepohliaceae; Trentepohliales, Ulvophyceae, Eukariota. Secondary photobiont absent.

Thallus: Crustose, leprose or granular. Thallus Outline: Soon disappearing or persistent. Upper Surface: Grey, white, olive, or brownish yellow; special structures absent. Lower Surface: Attached by the whole lower surface or attached by holdfasts; special structures absent or present:; 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 or perithecioid, orbicular or linear, forming all across the thallus surface, not emerging, becoming adnate to soon sessile, stromatic. Margin: Indistinct to distinct. Periphyses: Absent. Epithecium: Apical cells black or brown. Hymenium: Oil inspersed. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed. Hypothecium: Black or brown.

Asci: Tholus thickened, not amyloid.

Ascospores: c. 8 per ascus, fusiform, 20-57 µm long, 2-6 µm wide, obtuse or aciculate; septa present; transversally septate, 2-8-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 or sessile to stipitate, formed all accross the thallus surface or along the thallus periphery.

Conidia: Filiform or curved.

Secondary Metabolites: Not detected or present, of the following substance class(es): (higher) aliphatic acids and secalonic acids.

(report generated 04.Okt.2007)