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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 or basionymous. Taxonomic rank: genus. Protoroccella. Roccellaceae Chevall. (1826); Arthoniales.

Taxonomic Literature: Sánchez-Pinto L. & Schulz M. in: Daniels F.J.A., Schulz M. & Peine J. (eds): Flechten Follmann: 317-327, Cologne (1995).

Lichen Photobionts: Primary photobiont present; trentepohlioid. Primary photobiont taxonomy: Trentepohlia; Trentepohliaceae; Trentepohliales. Secondary photobiont absent.

Thallus: Crustose, not subdivided parts, squamulose or subfruticose. Upper Surface: Grey or brownish yellow; special structures absent. Lower Surface: Attached by the whole lower surface or 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 or directly at the thallus margin, soon sessile or stipitate. Margin: Indistinct to distinct. Exciple: Black or brown. Epithecium: Apical cells black or brown. Interascal Hyphae: Present, distinctly branched, not or scarcely anastomosed to distinctly anastomosed. Hypothecium: Black or brown.

Ascospores: c. 8 per ascus, ellipsoid or fusiform, (9)-12-15-(18) µm long, 2-4 µm wide, obtuse; septa present; transversally septate, 3-transversally septate; 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.

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

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

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