Bryocaulon Kärnefelt (1986)
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: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 3. Bryocaulon. Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.
Type Information: Type: Bryocaulon divergens (Ach.) Kärnefelt.
Taxonomic Literature: Kärnefelt I., Opera Bot. 86: 17-33 (1986).
Biogeography: Checklist records: Italy, Sweden and Norway, United States and Canada (continental), and Bolivia.
Ecology: Biotroph; lichenized; terricolous or corticolous.
Lichen Photobionts: Primary photobiont present; chlorococcal. Secondary photobiont absent.
Thallus: Fruticose, not subdivided parts. Upper Surface: Black or brown; special structures absent or present:; not pseudocyphellate or pseudocyphellate; eciliate; without hairs; not isidate; not sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by holdfasts; special structures absent.
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: Distinct to prominent; external filaments absent. Exciple: White. Periphyses: Absent. Epithecium: Apical cells brown. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White.
Asci: Tholus thickened, amyloid, with non-amyloid wide axial body and divergent amyloid flanks towards apex; dehiscence lecanoralean.
Ascospores: c. 8 per ascus, ellipsoid, 6-9 µm long, 2.5-4.5 µm wide, obtuse; septa absent; 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.
Conidia: Bifusiform.
Secondary Metabolites: Present, of the following substance class(es): orcinol depsides and orcinol depsidones.
(report generated 04.Okt.2007)
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