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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 3. Lithographa. Rimulariaceae Hafellner (1984); Cladoniineae; Lecanorales.

Taxonomic Literature: Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero
Special 7: 1-893 [503] (1985); Hertel H. & Rambold G., Biblioth.
Lichenol. 38: 145-189 (1990); Purvis O.W. in: Purvis O.W. et al.
(eds), The Lichen Flora of Great Britain and Ireland, London (1992).

Biogeography: Checklist records: Austria, Germany, Great Britain, Italy, Sweden and Norway, United States and Canada (continental), and Republic of South Africa.

Lichen Photobionts: Primary photobiont present; chlorococcal. Secondary photobiont absent.

Thallus: Crustose, rimose or areolate (primarily areolate). Thallus Outline: Soon disappearing or persistent. Upper Surface: Grey, white, or brownish yellow; special structures absent. Lower Surface: Attached by the whole lower surface; special structures absent or present:; not pseudocyphellate; not cyphellate; not 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, irregular or linear, forming all across the thallus surface, soon sessile. Margin: Prominent; external filaments absent. Exciple: Black or brown. Periphyses: Absent. Epithecium: Apical cells brown, hyaline, or brownish yellow. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed to distinctly anastomosed. Hypothecium: Black or brown.

Asci: Tholus thickened, amyloid, with amyloid cap or tube and flanks; dehiscence lecanoralean.

Ascospores: c. 8 per ascus, ellipsoid, 9-16 µm long, 5-5.5-8 µm wide, obtuse; septa absent; 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.

Secondary Metabolites: Not detected or present, of the following substance class(es): orcinol depsides and ß-orcinol depsidones.

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