Micarea Fr. (1825)

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: 70. Micarea. Micareaceae Hafellner (1984); Cladoniineae; Lecanorales.

Type Information: Type: Micarea prasina Fr.

Taxonomic Literature: Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest, N.S. 7: 1-

893 [510-519] (1985); Coppins B.J., Bull. Brit. Mus. (Nat. Hist.),

Bot. 11(2): 17-214 (1983); Coppins B.J. in: Farkas E.+.,
Lücking
R. & Wirth V. (eds), Biblioth. Lichenol. 58: 57-62
(1995);
Coppins B.J. in: Purvis O.W., Coppins B.J., Hawksworth
D.L., James
P.W. & Moore D.M. (eds), The lichen flora of Great
Britain and
Ireland: 1-710 [371-384] (1992); Coppins B.J. &
Muhr L.-E.,
Graphis Scripta 8: 45-49 (1997); Galloway D.J., Flora
of New Zealand.
Lichens: 1-662 [291-293] (1985); Ihlen P.G.,
Lichenologist 30: 27-57
[48-49] (1998); Poelt J. & Vezda A.,
Biblioth. Lichenol. 9: 1-258
[157-165] (1977); Rambold G.,
Biblioth. Lichenol. 34: 1-346 (1989);
Rambold G. & Triebel D.,
Biblioth. Lichenol. 48: 1-201 [142]
(1992); Tønsberg T.,
Sommerfeltia 14: 1-331 (1992); Vezda A.
& Wirth V., Folia
Geobot. Phytotax. 11: 93-102 (1976).

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 or lichenicolous; terricolous, bryophytic, lignicolous, or corticolous; substrate non-calciferous.

Lichen Photobionts: Primary photobiont present; chlorococcal. Primary photobiont taxonomy: Elliptochloris and Pseudochlorella (A. Beck 22-05-97); Nostocaceae and genus incertae sedis; family of unknown placement (incertae sedis), Chlorophyceae and Trebouxiophyceae, Eukariota. Secondary photobiont absent or present.

Thallus: Indistinct or crustose, not subdivided parts, leprose, granular, or rimose. Upper Surface: White, grey, green, olive, brownish yellow, or brown; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate; not sorediate; not cephalodiate or cephalodiate; not lobulate; without granules or with granules granules, without thalloconidia thalloconidia. 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: Apothecioid, orbicular or irregular, forming all across the thallus surface, becoming adnate to soon sessile. Margin: Indistinct to prominent; external filaments absent. Exciple: White, grey, black, violet, green, olive, brownish yellow, or brown. Periphyses: Absent. Epithecium: Apical cells hyaline, grey, black, green, olive, brownish yellow, or brown. Interascal Hyphae: Present, scarcely branched to distinctly branched, not or scarcely anastomosed to distinctly anastomosed. Hypothecium: White, grey, black, violet, green, olive, brownish yellow, or brown.

Asci: Tholus thickened, amyloid, with amyloid tube; dehiscence lecanoralean.

Ascospores: c. 8 per ascus, ellipsoid, broadly ellipsoid, ovoid, oblong-obtuse, oblong, fusiform, or filiform, 6-43 µm long, 2-6 µm wide, obtuse; septa absent or present; transversally septate, 1-11-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; pycnidial; immersed or sessile to stipitate, formed all accross the thallus surface or along the thallus periphery.

Conidiogeneous Cells: Apical. Conidia: Globose, bacilliform, filiform, or curved.

Secondary Metabolites: Not detected or present, of the following substance class(es): orcinol depsides, orcinol depsidones, and xanthones.

(report generated 04.Okt.2007)