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Data Set Maintenance: Data set authentic and standard item. Data set author(s): Bungartz F. (02-08-30). Data set not to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Anaptychia. Synonyms: Physconia thomsonii Essl.; Physciaceae Zahlbr. (1898).

Biogeography: Continent: Asia-Temperate and Northern America. Checklist records: Sonoran Desert and United States and Canada (continental).

Thallus: Foliose, lobed; lobes irregularly flabellate; rounded at the front; plane (at tips) or convex (inwards from tips); separate thallus parts 1-2 mm wide. Thallus Size and Differentiation: Up to 5 cm in diameter; apex not curved. Upper Surface: Grey or grey-brown; pruinose; pruina abundant; continuous; without hairs (but very sparse on some lobe tips); not isidate; sorediate; soralia grey or brown, peripheral, terminal, labriform, isidiate, soredia usually coarse. Lower Surface: Brown (very pale) or white in the centre, white along the margin, loosely attached attached; rhizines sparse or moderately abundant, white or pale brown, not branched or branched, sparsely furcate.

Upper Cortex: Outer cortical layer prosoplectenchymatous. Medulla: White. Lower Cortex: Present; prosoplectenchymatous, of periclinal hyphae.

Reproduction Strategy: Only known as sterile, asexually reproducing form (none seen).

Secondary Metabolites: Present; throughout the thallus medulla, metabolite(s) of unresolved identity: present (unknown terpenoid).

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