Botanische Staatssammlung München © 1995–2008
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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. Taxonomic rank: genus. Number of known taxa within this rank: 2. Graphidastra. Genus of unknown placement (incertae sedis); Arthoniales.

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

Thallus: Crustose, not subdivided parts, granular. Thallus Outline: Soon disappearing or persistent. Upper Surface: Green or grey; special structures absent. Lower Surface: Attached by the whole lower surface; special structures absent or present:; not pseudocyphellate; not cyphellate; not rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular or linear, forming all across the thallus surface, soon sessile. Margin: Prominent. Exciple: Black or brown. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: Black or brown.

Ascospores: c. 8 per ascus, filiform, 35-55 µm long, 2-3 µm wide, obtuse or aciculate; septa present; transversally septate, 2-4-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 or along the thallus periphery.

Secondary Metabolites: Present, of the following substance class(es): ß-orcinol depsidones and (higher) aliphatic acids.

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