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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): 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: 5. Topelia. Stictidaceae Fr. (1849); Ostropales.

Taxonomic Literature: Jørgensen P.M. & Vezda A., Beih. Nova Hedwigia 79: 501 (1984); Nash T.H. III & Nimis P.L. in: Nash T.H. III et al. (eds) Lichen Flora of the Greater Sonoran Desert Region vol. 1, 502, Tempe (2002); Tretiach M. & Vezda A., Lichenologist 24: 107-110 (1992).

Biogeography: Checklist records: Italy, Sonoran Desert, and United States and Canada (continental).

Ecology: Biotroph; lichenized; bryophytic or corticolous; substrate calciferous.

Lichen Photobionts: Primary photobiont present; trentepohlioid. Primary photobiont taxonomy: Trentepohlia (A. Beck 22-05-97); Trentepohliaceae; Trentepohliales, Ulvophyceae, Eukariota. Secondary photobiont absent.

Thallus: Indistinct or crustose, not subdivided parts, granular. Upper Surface: Grey, green, brown, white, brownish yellow, orange, or pink (rosé); special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate or isidiate (also schizidia); not sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface; special structures absent.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid (sometimes appearing) or perithecioid, orbicular, forming all across the thallus surface, not emerging, becoming adnate to soon sessile. Margin: Distinct to prominent; external filaments absent. Exciple: Black, brown, white, or brownish yellow. Periphyses: Absent. Interascal Hyphae: Absent or present, scarcely branched, not or scarcely anastomosed. Hypothecium: White.

Ascospores: c. 8 per ascus, globose, broadly ellipsoid, or ellipsoid, 12-120 µm long, 2-20 µm wide, obtuse; septa present; both transversally and longitudinally; 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.

Conidiogeneous Cells: Apical. Conidia: Bacilliform; microconidial or macroconidial.

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