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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Jørgensen P. M. (98-03-20); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 2. Leciophysma. Genus of unknown placement (incertae sedis); Peltigerineae; Lecanorales.

Taxonomic Literature: Fries Th.M., Bot. Not. 1865: 102 (1865); Henssen A., Lichenologist 3: 29-41 (1965); Jørgensen P.M., Graphis Scripta 2: 56 (1988).

Biogeography: Checklist records: Sweden and Norway and United States and Canada (continental).

Lichen Photobionts: Primary photobiont present; cyanobacterial. Primary photobiont taxonomy: Nostoc; Nostocaceae. Secondary photobiont absent.

Thallus: Crustose, not subdivided parts, subfruticose or granular. Thallus Outline: Soon disappearing. Upper Surface: Black or brown; special structures absent. Lower Surface: Attached by holdfasts; special structures present:; not pseudocyphellate; not cyphellate; rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose.

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: Indistinct to prominent; external filaments absent. Exciple: White. Periphyses: Absent. Epithecium: Apical cells brown. Hymenium: Iodine reaction: Lugol’s positive. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White.

Asci: Tholus thickened, amyloid, entirely amyloid throughout; dehiscence lecanoralean.

Ascospores: c. 8 per ascus, ellipsoid, broadly ellipsoid, or globose, 11-23 µm long, 7-14 µm wide, obtuse or aciculate; septa present; transversally septate, 1-transversally septate; wall thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

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