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Data Set Maintenance: Data set standard item. Data set author(s): Triebel D. Data set reviewer(s): Scholz P. (07-07-24) and Triebel D. (98-01-01; 00-06-12); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 10. Scutula. Ramalinaceae Ag. (1821); Lecanorineae; Lecanorales.

Taxonomic Literature: Martínez Moreno M.I., Ruzia 15: 1-200 [174-174, 178-180]
(1999); Rambold G. & Triebel D., Biblioth. Lichenol. 48: 1-201
[127-129] (1992); Triebel D., Wedin M. & Rambold G., in: Tibell
L. & Hedberg, I. (eds), Symb. Bot. Upsal. 32(1): 323-337 (1997); Wedin M., Ihlen P.G. & Triebel D., Lichenologist 39: 329-333 (2007).

Biogeography: Checklist records: Austria, Germany, Great Britain, Italy, New Guinea, Sonoran Desert, Sweden and Norway, and United States and Canada (continental).

Lichen Photobionts: Primary photobiont absent or present; chlorococcal. Primary photobiont taxonomy: Chroococcales. Secondary photobiont absent.

Thallus: Indistinct or crustose, not subdivided parts, granular. Upper Surface: Green or brown; special structures absent. Lower Surface: Attached by the whole lower surface; special structures absent.

Medulla: Iodine reaction in Lugol's solution negative; not different with or without KOH pre-treatment (euamyloid).

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: Red, green, brownish yellow, or brown. Periphyses: Absent. Epithecium: Apical cells green or brown. Hymenium: Iodine reaction: Lugol’s negative, hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White, brownish yellow, or brown.

Asci: Tholus thickened, amyloid, with amyloid tube; ocular chamber broad; dehiscence lecanoralean; exoascus euamyloid, hemiamyloid.

Ascospores: c. 8 per ascus, globose or broadly ellipsoid, 8-17 µm long, 2.5-7 µm wide, obtuse or aciculate; septa present; transversally septate, 1-(3)-transversally septate, formed by the proper spore wall; 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.

Conidiogeneous Cells: Apical or intercalar. Conidia: Bacilliform, filiform, or curved; microconidial or macroconidial; aseptate or septate; 0-1-septate; cell wall hyaline.

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