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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Moberg R. (95-11-28), Nimis P. L. (96-10-07), and Scholz P. (02-05-17); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 1. Tornabea. Synonyms: Tornabenia Trevis. (nom. illegit.); Tornabeniopsis Follmann (nom. inval.); Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Taxonomic Literature: Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero
Special 7: 1-893 [758] (1985); Kurokawa S., J. Jap. Bot. 37: 289-294
(1962); Nimis P.L. & Tretiach M. in: Nash T.H. III et al. (eds) Lichen Flora of the Greater Sonoran Desert Region vol. 1, 503, Tempe (2002); Poelt J. & Vezda A., Biblioth. Lichenol. 16: 1-390 [333]
(1981); Purvis O.W. in: Purvis O.W. et al. (eds), The Lichen Flora of
Great Britain and Ireland, London (1992); Rambold G., Mayrhofer H.
& Matzer M., Pl. Syst. Evol. 192: 31-40 (1994).

Ecology: Biotroph; lichenized; terricolous, lignicolous, or corticolous; substrate non-calciferous or calciferous.

Lichen Photobionts: Primary photobiont present; chlorococcal. Primary photobiont taxonomy: Trebouxiophyceae, Eukariota. Secondary photobiont absent.

Thallus: Fruticose, not subdivided parts. Upper Surface: Grey, brown, or brownish yellow; special structures absent or present:; not pseudocyphellate; eciliate; without hairs or hairy; not isidate or isidiate; not sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia or with 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: Distinct to prominent; external filaments absent. Exciple: Green or white. Periphyses: Absent. Epithecium: Apical cells brown. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White.

Asci: Tholus thickened, amyloid, with non-amyloid wide axial body and divergent amyloid flanks towards apex; dehiscence lecanoralean.

Ascospores: c. 8 per ascus, broadly ellipsoid or ellipsoid, 20-30 µm long, 10-15 µm wide, obtuse; septa present; transversally septate, 1-2-transversally septate; wall thin, thickened at the septum, dark brown, in Lugol's Solution negative, wall not ornamented or ornamented.

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

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