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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Tehler A. (95-11-27); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 2. Sagenidiopsis. Synonyms: Byssophoropsis (Vain.) Tehler; Opegraphaceae Stizenb. (1862); Arthoniales.

Taxonomic Literature: Aptroot A., Diederich P., Sérusiaux E. & Sipman H.J.M., Biblioth. Lichenol. 64: 1-220 [179] (1997); Egea I.M., Tehler A., Torrente P. & Sipman H.J.M., Lichenologist 27: 351-359 (1995); Rogers R.W. & Hafellner J., Lichenologist 19: 401-408 (1987); Tehler A., Cryptog. Bot. 3: 139-151 (1993) - sub Byssophoropsis.

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

Thallus: Crustose, not subdivided parts, leprose or granular. Thallus Outline: Soon disappearing or persistent. Upper Surface: Brownish yellow or white; 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, orbicular, forming all across the thallus surface, soon sessile. Margin: Prominent. Exciple: Brown. Epithecium: Apical cells brown or brownish yellow. Interascal Hyphae: Present, scarcely branched to distinctly branched, not or scarcely anastomosed. Hypothecium: Black or brown.

Ascospores: c. 8 per ascus, filiform or fusiform, 24-46 µm long, 2.5-4 µm wide, obtuse or aciculate; septa present; transversally septate, 3-(4)-transversally septate; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed or present; pycnidial; immersed or sessile, 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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