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Data Set Maintenance: Data set compiled. Data set author(s): Helms G. (01-01-22). Data set not to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Currently accepted name Buellia aethalea. Buellia. Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Biogeography: Cosmopolitan. Continent: Australasia, Europe, Northern America, and Southern America. Checklist records: Australia, Austria, Germany, Great Britain, Italy, Sweden and Norway, and United States and Canada (continental).

Ecology: Biotroph; lichenized; growing under conditions which are dry; substrate non-calciferous.

Thallus: Not subdivided parts, areolate (primarily areolate); separate thallus parts thin or thick. Thallus Size and Differentiation: At least (2) cm in diameter. Thallus Outline: Distinct. Upper Surface: Grey (pale to dark grey); eciliate; without hairs; not isidate; not sorediate; not schizidiate; not lobulate. Lower Surface: Absent, firmly attached attached; attached by the whole lower surface.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Not emerging, .2-.4-(.7) mm in diam.. Margin: Not isidiate; not ciliate. Disk: Plane. Epithecium: Apical cells brown.

Ascospores: (9.5)-12-18-(20) µm long, (4.5)-6-10-(12) µm wide; septa present; transversally septate; 1-transversally septate.

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