Myelorrhiza Verdon & Elix (1986)

Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Verdon D. (96-01-23) and Elix J. A. (96-01-23); revised; to be published after submission.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 2. Myelorrhiza. Cladoniaceae Zenker (1827); Cladoniineae; Lecanorales.

Type Information: Type: Myelorrhiza antrea Verdon & Elix.

Taxonomic Literature: Verdon D. & Elix J.A., Brunonia 9: 193-214 (1987).

Ecology: Biotroph; lichenized; corticolous; substrate non-calciferous.

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

Thallus: Foliose, not subdivided parts, lobed. Thallus Outline: Soon disappearing. Upper Surface: Green, grey, brownish yellow, olive, or white; special structures absent. Lower Surface: Attached by holdfasts; special structures absent or present:; not pseudocyphellate; not cyphellate; not rhizinate or rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose or tomentose.

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 or directly at the thallus margin, soon sessile to stipitate. Margin: Distinct to prominent; external filaments absent. Exciple: Brown. Periphyses: Absent. Epithecium: Apical cells brown. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: Black or brown.

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

Ascospores: c. 4 to c. 8 per ascus, ellipsoid, 10-15 µm long, 5-7 µm wide, obtuse; septa absent; wall thin or thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented or ornamented.

Conidiomata: Absent resp. not observed or present; pycnidial; immersed or stipitate, formed along the thallus periphery.

Conidiogeneous Cells: Apical. Conidia: Bacilliform or filiform.

Secondary Metabolites: Present, of the following substance class(es): orcinol depsidones.

(report generated 04.Okt.2007)