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Lecidella granulosula (Nyl.) Knoph & Leuckert

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (01-06-12). Data set reviewer(s): Knoph J.-G. (03-10-22); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Lecidella. Synonyms: Lecidella chodatii (Samp.) Knoph & Leuckert; Lecidea chodatii
Samp.; Lecidella viridans (Flot.) Körb. var. chodatii (Samp.)
Hertel & Leuckert;
Lecanoraceae Körb. (1855); Lecanorales.

Type Information: Basionym: Lecidea granulosula Nyl., in Cromb., Journ. Bot. 14: 21 (1876).

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 [139-150 sub L. chodatii].
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 [474-475 sub L. chodatii].
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 [9-11].

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

Ecology: Biotroph; lichenized; corticolous (rarely); substrate usually non-calciferous.

Thallus: Crustose, not subdivided (rarely) parts, areolate (primarily areolate); separate thallus parts thin or thick (0.1-0.5 mm). Thallus Outline: Persistent (rarely found at individual areoles); black or dark grey. Upper Surface: Strongly verruculose (to nearly isidia-like), grey-yellow or pale grey, matt.

Medulla: Iodine reaction in Lugol's solution negative.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Becoming adnate or soon sessile, slightly constricted at the base, .5-.6-.8 mm in diam.. Margin: Lecideine/biatorine, persistent, distinct or indistinct (0.5 mm). Disk: Plane or weakly convex, black, epruinose. Exciple: Carbonized; green, brown (sometimes), or grey-green. Parathecium (proper excipulum): White, inspersed with crystals (sometimes). Amphithecium (thalline excipulum): Present. Episamma: Rarely with episamma (when damaged ?). Epithecium: Apical cells slightly swollen, green, grey-green, or olive. Hymenium: White. Hypothecium: White (partly strongly filled with crystals).

Ascospores: c. 8 per ascus, ellipsoid, 10-13 µm long, 6-7 µm wide; septa absent; wall thick (not halonate), distinctly differentiated into primary and secondary wall (not halonate), not ornamented (not halonate).

Pycnidia: Globular. Conidiophores: Vobis-type III. Conidia: Filiform or slightly curved; 14-20 µm long.

Secondary Metabolites: 2,5,7-trichloro-3-O-methylnorlichexanthone, 5,7-dichloro-3-O-methylnorlichexanthone, atranorin, chodatin, demethylchodatin, isoarthothelin (= 2,5,7-trichloronorlichexanthone), or thiophanic acid (= 2,4,5,7-tetrachloronorlichexanthone).

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

(report generated 04.Okt.2007)

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