Lecidella buelliastrum (Müll. Arg.) Knoph & Rambold

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (01-06-10). Data set reviewer(s): Knoph J.-G.; revised (03-10-22); to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Lecidella. Lecanoraceae Körb. (1855).

Type Information: Basionym: Lecidea buelliastrum Müll. Arg. 1887. Flora 70: 322.

Taxonomic Literature: Knoph, J.-G. (1990): Untersuchungen an gesteinsbewohnenden xanthonhaltigen Sippen der Flechtengattung Lecidella (Lecanoraceae, Lecanorales) unter besonderer Berücksichtigung von außereuropäischen Proben exklusive Amerika; Bibl. Lichenol. 36: 1-183 [156-159]
Knoph, J.-G. & Leuckert, C. (1994): Chemotaxonomic studies in the saxicolous species of the lichen genus Lecidella (Lecanoraceae, Lecanorales) in America. - Nova Hedwigia 59: 455-508 [469-470].
Knoph, J.-G. & Leuckert, C. (2000): Chemotaxonomische Studien in der Gattung Lecidella (Lecanorales, Lecanoraceae) III. Die gesteinsbewohnenden Arten mit farblosem Hypothecium unter besonderer Berücksichtigung von europäischem Material. - Herzogia 14: 1-26 [6-8].

Biogeography: Continent: Africa, Australasia, and Southern America.

Ecology: Biotroph; lichenized; substrate non-calciferous.

Thallus: Crustose, strongly rimose or areolate (primarily areolate); separate thallus parts thin or thick ((- 0.8 mm)). Thallus Outline: Slightly lobed (sometimes); soon disappearing or rarely persistent; dark grey or dark brown. Upper Surface: White or lemon (citrine), matt or glossy (shiny).

Medulla: Iodine reaction in Lugol's solution negative.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Becoming adnate or soon sessile, slightly constricted or strongly constricted at the base, .5-.8 mm in diam.. Margin: Lecideine/biatorine, excluded, indistinct or distinct. Disk: Plane or weakly convex, black or dark brown (sometimes, when damaged ?), epruinose. Exciple: Carbonized; dark grey (sometimes), dark blue, grey-green, or aeruginose. Parathecium (proper excipulum): White, inspersed with crystals (sometimes). Amphithecium (thalline excipulum): Present. Epithecium: Apical cells slightly swollen, vagrant, grey-green, or turquoise. Hymenium: White. Hypothecium: Pale brown (rarely) or white.

Ascospores: c. 8 per ascus, ellipsoid, 10-13 µm long, 5-6.5 µm wide; septa absent; wall thick (not halonate), distinctly differentiated into primary and secondary wall (not halonate), not ornamented (not halonate).

Conidiomata: Immersed.

Pycnidia: Globular (with brownish black wall). Conidiophores: Vobis-type III. Conidia: Filiform or strongly curved; 15-25 µm long.

Secondary Metabolites: Atranorin, caloploicin, chloroatranorin, diploicin, or thiophanic acid (= 2,4,5,7-tetrachloronorlichexanthone).

Spot Tests: Upper surface: K + deep yellow, C –, KC + orange, PD + yellow.

(report generated 04.Okt.2007)