Lecanactis Körb. (1855)

Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Egea J.M. & Torrente P.; revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 25 (A. Aptroot 99-09-27). Lecanactis. Roccellaceae Chevall. (1826); Arthoniales.

Type Information: Type: Lecanactis abietina (Ach.) Körb.

Taxonomic Literature: Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero
Special 7: 1-893 [389-392] (1985); Egea J.M. & Torrente P.,
Bryologist 95: 161-165 (1992); Egea J.M. & Aptroot A., Mycotaxon
45: 93-96 (1992); Egea J.M., Torrente P. & Manrique E., Pl. Syst.
Evol. 187: 103-114 (1993); Egea J.M. & Torrente P., Biblioth.
Lichenol. 54: 1-205 (1994); Egea J. M., Sérusiaux E. &
Torrente P., Mycotaxon 59: 47-59 (1996); Galloway D.J., Flora of New
Zealand Lichens: i-lxxiii, 1-662 [205-208], Wellington (1985); James
P.W. & Coppins B.J., Lichenologist 11: 253-262 (1979);
Jørgensen P.M. & Tønsberg T., Nordic J. Bot. 8. 293-
304 (1988); Lettau G., Beih. Repert. Spec. Nov. Regni Veg. 69: 1-250
(1932-7); Purvis O.W. & Rose F. 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); Tehler A., Willdenowia 22: 201-214
(1992); Tehler A. & Egea J.M., Lichenologist 29: 397-414 (1997);
Torrente P. & Egea J.M., Biblioth. Lichenol. 32: 1-282 (1989).

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

Ecology: Biotroph; lichenized; terricolous, bryophytic, or corticolous; substrate non-calciferous or calciferous.

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

Thallus: Crustose, not subdivided parts, leprose, granular, or rimose. Thallus Outline: Soon disappearing or persistent. Upper Surface: Grey, white, grey-yellow, or olive; special structures absent; not pseudocyphellate; eciliate; without hairs; not isidate; not 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, soon sessile. Margin: Prominent; external filaments absent. Exciple: Dark brown or brownish yellow. Epithecium: Apical cells brown or brownish yellow. Hymenium: Iodine reaction: Lugol’s negative or Lugol’s positive, hemiamyloid. Interascal Hyphae: Present, scarcely branched or distinctly branched, not or scarcely anastomosed. Hypothecium: Brown or brownish yellow.

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

Ascospores: c. 8 per ascus, fusiform, filiform, or curved, 16-60 µm long, 3-7 µm wide, obtuse or aciculate; septa present; transversally septate, 2-8-transversally septate; wall thin or thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, dark brown, hyaline, or pale brown, in Lugol's Solution negative, wall not ornamented or ornamented.

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

Conidiogeneous Cells: Apical. Conidia: Filiform, bacilliform, or curved; microconidial or macroconidial, not branched; aseptate; cell wall hyaline.

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

(report generated 04.Okt.2007)