Bacidia De Not. (1846)

Data Set Maintenance: Data set standard item. Data set author(s): Triebel D. Data set reviewer(s): Triebel D. (98-01-01); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 200. Bacidia. Synonyms: Psorella Müll. Arg. (1894); Toniniopsis Frey (1926); Biatoraceae A. Massal. ex Stiz. (1862); Lecanorineae; Lecanorales.

Type Information: Type: Bacidia rosella (Pers.) De Not.

Taxonomic Literature: Clauzade G., Diederich P. & Roux C., Bull. Soc. Linn.
Provençe, N.S. 1: 1-142 [32] (1989) - sub Bacidia killiasii,
Mycobilimbia arnoldiana, M. tetramera; Coenen C., Saxicole Bacidien
und Bacidinen Bayerns, Zulassungsarbeit LMU, München (1991);
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 [101-114] (1992); Ekman S., Opera Bot. 127: 1-148
(1996); Galloway D.J., Flora of New Zealand. Lichens: 1-662 [25-36]
(1985); Hawksworth D.L., Lichenologist 15: 1-44 [22] (1983) - sub
Bacidia killiasii; Kalb K. & Elix J.A. in: Knoph J.-G.,
Schrüfer K. & Sipman H.J.M., Biblioth. Lichenol. 57: 265-296
[280] (1995); Keissler K. von, Rabenh. Kryptog.-Fl. 8: 1-712 [166-
168] (1930) - sub Mycobilimbia killiasii and M. arnoldiana; Rambold
G. & Triebel D., Biblioth. Lichenol. 48: 1-201 [92] (1992);
Santesson R., Symb. Bot. Upsal. 12(1): 1-590 [436-477] (1952).

Biogeography: Checklist records: Austria, Germany, Great Britain, Guianas, Italy, 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, corticolous, or epiphyllous; substrate non-calciferous.

Lichen Photobionts: Primary photobiont absent or present; chlorococcal. Primary photobiont taxonomy: Dictyochloropsis (A. Beck 22-05-97); genus incertae sedis; Dictyochloropsis-group, Trebouxiophyceae, Eukariota. Secondary photobiont absent.

Thallus: Indistinct or crustose, not subdivided parts, granular or rimose. Thallus Outline: Soon disappearing. Upper Surface: Grey, white, olive, or brownish yellow; special structures absent or present:; not 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 or present:; not pseudocyphellate; not cyphellate; not rhizinate or rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose.

Medulla: Iodine reaction in Lugol's solution negative.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, forming all across the thallus surface, soon sessile. Margin: Indistinct to prominent; external filaments absent. Periphyses: Absent. Epithecium: Apical cells grey, green, yellow, or brown. Hymenium: Iodine reaction: Lugol’s positive. Interascal Hyphae: Present, scarcely branched to distinctly branched, not or scarcely anastomosed. Hypothecium: Grey, green, brown, olive, or brownish yellow.

Asci: Tholus thickened, amyloid, with non-amyloid narrow axial body and amyloid convergent flanks towards apex; dehiscence lecanoralean; exoascus not amyloid.

Ascospores: c. 8 per ascus, ellipsoid, filiform, oblong, curved, or fusiform, 60-65 µm long, 3-5 µm wide, obtuse or aciculate; septa present; transversally septate, 1-18-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, formed all accross the thallus surface.

Conidia: Bacilliform.

Secondary Metabolites: Not detected or present, of the following substance class(es): ß-orcinol depsides and (tri-)terpenoids.

(report generated 04.Okt.2007)