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Lecidella viridans (Flot.) Körb.

Data Set Maintenance: Data set compiled. Data set author(s): Kainz C. (01-07-03). 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. Synonyms: Lecidella elaeochromiza (Nyl.) Choisy; Lecanoraceae Körb. (1855); Lecanorales.

Type Information: Basionym: Lecidea sabuletorum (Schreb.) Fr. var. viridans Flot. 1828. Flora 11: 697-698.

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 [500-502].
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 [17-18].

Biogeography: Continent: Europe, Northern America, and Southern America.

Ecology: Biotroph; lichenized; substrate non-calciferous.

Thallus: Crustose, areolate (primarily areolate) or granular; separate thallus parts thin (0.1-0.3 mm). Thallus Outline: Persistent (rarely); black or grey. Upper Surface: Verrucose (to wavy), light grey (creamy) or lemon (citrine), matt.

Medulla: Iodine reaction in Lugol's solution negative.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Soon sessile, slightly constricted or strongly constricted at the base, .2-.4-.8 mm in diam.. Margin: Lecideine/biatorine, excluded, indistinct. Disk: Plane or weakly convex, black or brown (when damaged ?), epruinose or pruinose (pale greyish, when damaged ?), pruina scarce. Exciple: Carbonized; brown or grey-green. Parathecium (proper excipulum): Pale brown (sometimes) or white. Amphithecium (thalline excipulum): Present. Epithecium: Apical cells slightly swollen, brown, grey-green, or olive (olivaceous). Hymenium: White. Hypothecium: Pale brown (rarely) or white.

Ascospores: c. 8 per ascus, ellipsoid, 9-13 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).

Secondary Metabolites: 4,5-dichloronorlichexanthone, arthothelin (2,4,5-trichloronorlichexanthone), isoarthothelin (= 2,5,7-trichloronorlichexanthone), thiophanic acid (= 2,4,5,7-tetrachloronorlichexanthone), or thuringione (= 2,4,5-trichloro-3-O-methylnorlichexanthone) (in traces), of the following substance class(es): xanthones.

Spot Tests: Upper surface: K – (negative), C + orange, PD –.

(report generated 04.Okt.2007)

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