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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: 5 (estimation provided by A. Aptroot 99-09-27). Conotrema. Stictidaceae Fr. (1849); Ostropales.

Taxonomic Literature: Aptroot A., Diederich P., Sérusiaux E. & Sipman H.J.M.,
Biblioth. Lichenol. 64: 1-220 [52-54] (1997); Clauzade G. & Roux
C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero Special 7: 1-893 [347]
(1985); Gilestam G., Ark. Bot., Ser. 2, 7: 149-179 (1969); Poelt J.
& Vezda A., Biblioth. Lichenol. 9: 1-258 [85] (1977); Vezda A.,
Folia Geobot. Phytotax. 12: 313-316 (1977).

Biogeography: Checklist records: Germany, New Guinea, Sweden and Norway, United States and Canada (continental), and Republic of South Africa.

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

Thallus: Indistinct or crustose, not subdivided parts. Upper Surface: Grey or white; special structures absent. 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, orbicular, forming all across the thallus surface, not emerging, becoming adnate to soon sessile. Margin: External filaments absent. Exciple: Black or brown. Periphyses: Absent. Epithecium: Apical cells olive or brownish yellow. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: Black, brown, or white.

Ascospores: c. 4 to c. 8 per ascus, filiform or allantoid, 80-190 µm long, 2.5-12 µm wide, obtuse; septa present; transversally septate or both transversally and longitudinally, 20-70-transversally septate; 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.

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