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Data Set Maintenance: Data set authentic and standard item. Data set author(s): Knoph, J.-G. (03-10-02). Data set reviewer(s): Knoph J.-G.; revised @EXCL@ not revised (03-10-22); to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Lecidella. Synonyms: Lecidea diasema Nyl.; Lecanoraceae Körb. (1855); Lecanorales.

Type Information: Basionym: Lecidea tumidula A. Massal. 1852. Ricerche Auton. Lich.: 71.

Taxonomic Literature: Knoph, J.-G. & Leuckert, C. (1997): Chemotypes and distribution patterns of the non-saxicolous species of Lecidella (Lecanoraceae, Lecanorales). - In: Türk, R. & Zorer, R. (eds): Progress and Problems in Lichenology in the Nineties - IAL 3. - Bibliotheca Lichenologica 68: 129-134.

Thallus: Crustose, not subdivided parts, granular or rimose; separate thallus parts thin or thick (up to 0.6 mm, rarely up to 1.0 mm). Thallus Outline: Soon disappearing or persistent. Upper Surface: Pale grey, lime green, or lemon (citrine), matt or weakly glossy (shiny).

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Becoming adnate or soon sessile, slightly constricted or strongly constricted at the base, .8-1-1.2 mm in diam.. Margin: Lecideine/biatorine, persistent or excluded, distinct, prominent, or indistinct (about 0.075 mm). Disk: Plane to rarely strongly convex to weakly convex, black, epruinose. Exciple: Carbonized; dark blue to dark green. Parathecium (proper excipulum): Brownish yellow to brownish red, not inspersed with crystals. Amphithecium (thalline excipulum): Present; photobiont absent. Epithecium: Apical cells not swollen to slightly swollen, green to dark green. Hymenium: 50-70-90 µm high; white. Hypothecium: Rarely brownish yellow or brownish red.

Ascospores: c. 8 per ascus, broadly ellipsoid or ovoid, (9)-11-(14) µm long, (5.5)-6.5-(7.5) µm wide; septa absent; wall thick (not halonate), distinctly differentiated into primary and secondary wall (not halonate), not ornamented (not halonate).

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