Chaenothecopsis Vain. (1927)

Data Set Maintenance: Data set standard item. Data set author(s): Triebel D. Data set reviewer(s): Tibell L. (98-02-23) and Triebel D. (99-02-12; 01-12-19; 03-02-01); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 28. Chaenothecopsis. Mycocaliciaceae A.F.W. Schmidt (1970); of unknown placement (incertae sedis).

Type Information: Type: Chaenothecopsis rubescens Vain.

Taxonomic Literature: 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 [182-185] (1992); Schmidt A., Mitt. Staatsinst.
Allg. Bot. Hamburg 13: 111-166 [140-155] (1970) - incl. Strongyleuma;
Tibell L., Symb. Bot. Upsal. 21(2): 1-128 (1975); Tibell L.,
Lichenologist 14: 219-254 (1982); Tibell L. in: Hertel H. &
Oberwinkler F. (eds), Beih. Nova Hedwigia 79: 597-713 (1984); Tibell
L., Symb. Bot. Upsal. 27(1): 1-279 (1987); Tibell L., Canad. J. Bot.
69: 2427-2433 (1991); Tibell L., Flora Neotropica Monograph 69: 1-78
[40-48] (1996); Tibell L. in: Tibell L. & Hedberg, I. (eds),
Symb. Bot. Upsal. 32(1): 291-322 (1997); Tibell L., Biblioth.
Lichenol. 71: 1-107 [62-89] (1998); Tibell L., Nord. J. Bot. 20: 717-742 (2001); Tibell L. & Ryman K., Nova Hedwigia 60: 199-218 (1995); Tibell L. & Titov A., Bryologist 98: 550-560 (1995); Titov A., Lichenologist 33(4): 303-314 (2001); Titov A. & Tibell L., Nord. J. Bot. 13: 313-329 (1993).

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

Ecology: Saprobic or biotroph; algicolous, lichenicolous, or fungicolous; terricolous, lignicolous, or corticolous; substrate non-calciferous.

Lichen Photobionts: Primary photobiont absent or present; chlorococcal and trentepohlioid. Primary photobiont taxonomy: Chlorella and Dictyochloropsis (A. Beck 19-05-97 but acc. L. Tibell 23-02-98 no photobionts); Dictyochloropsis-group and family of unknown placement (incertae sedis), Chlorophyceae and Trebouxiophyceae, Eukariota. Secondary photobiont absent.

Thallus: Indistinct.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, soon sessile to stipitate. Margin: Indistinct to prominent; external filaments absent or present. Exciple: Green, brown, red, olive, or brownish yellow. Epithecium: Apical cells green, brown, red, olive, or brownish yellow. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed. Hypothecium: Green, brown, red, white, olive, or brownish yellow.

Asci: Tholus not thickened or thickened, not amyloid; ocular chamber indistinct or broad; dehiscence unitunicate.

Ascospores: c. 8 per ascus, broadly ellipsoid, ellipsoid, fusiform, oblong-obtuse, or oblong, 3.5-14 µm long, 1.5-5.5 µm wide, obtuse or aciculate; septa absent or present; transversally septate, (0)-1-1-transversally septate; wall thin, not thickened at the septum, not constricted where the septum meets the spore wall, dark brown, middle brown, or pale brown, in Lugol's Solution negative, wall not ornamented or ornamented.

Conidiomata: Present or absent resp. not observed; pycnidial or hyphomycetous; sessile to stipitate.

Conidiogeneous Cells: Apical. Conidia: Globose or bacilliform.

Secondary Metabolites: Not detected.

(report generated 04.Okt.2007)