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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Tehler A. (95-11-27); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 1. Roccellaria. Roccellaceae Chevall. (1826); Arthoniales.

Type Information: Type: Roccellaria mollis (Hampe) Zahlbr. (= Roccellaria intricata (Mont.) Darb.).

Taxonomic Literature: Darbishire O.V., Ber. Deutsch. Bot. Ges. 15: 2-10 (1897); Tehler A., Can. J. Bot. 68: 2458-2492 (1990).

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

Thallus: Fruticose, not subdivided parts. Upper Surface: Grey or brownish yellow; special structures present:; not pseudocyphellate; eciliate; without hairs; not isidate; 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: Prominent. Epithecium: Apical cells brown or brownish yellow. Interascal Hyphae: Present, scarcely branched to distinctly branched, not or scarcely anastomosed. Hypothecium: Black or brown.

Ascospores: c. 8 per ascus, fusiform, 21-26 µm long, 4-5 µm wide, obtuse or aciculate; septa present; transversally septate, 3-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.

Secondary Metabolites: Present, of the following substance class(es): (higher) aliphatic acids.

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