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Lecidella scabra (Taylor) Hertel & Leuckert

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (01-06-26). 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 aequata (Flk.) Krempelh. var. fatiscens Krempelh.; Lecidea
enterochlora Th. Tayl.; Lithographa larbalestierii Leight.; Lecidea
alienata Nyl.; Lecidella prasinula (Wedd.) Hertel; Lecidella
dirumpens (Hertel & Poelt) Hertel & Poelt;
Lecanoraceae Körb. (1855); Lecanorales.

Type Information: Basionym: Lecidea scabra Th. Tayl. in Mack. 1836. Fl. Hibern. 2: 121.

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 [130-135].
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 [494-496].
Knoph, J.-G., Leuckert, C. & Rittner, W. (1997): Chemie und Verbreitung von Lecidella scabra. - In: Kappen, L.: New species and novel aspects in ecology and physiology of lichens in honour of O. L. Lange. - Bibliotheca Lichenologica 67: 33-46.
Toensberg, T. (1992): The sorediate and isidiate, corticolous, crustose lichens of Norway; Sommerfeltia 14: 1-331 [190-192].

Biogeography: Continent: Europe and Northern America.

Ecology: Biotroph; lichenized; substrate non-calciferous.

Thallus: Crustose, strongly rimose or areolate (primarily areolate); separate thallus parts thin or thick (0.1-0.3 mm). Thallus Outline: Soon disappearing. Upper Surface: Grey-yellow (dirty) or lemon (citrine), matt, pulverulaceous (sorediose); special structures present:; sorediate; soralia up to 1.2 mm in diam., pale green or lemon (citrine), soredia coarse, 20-40 µm in diam..

Medulla: Iodine reaction in Lugol's solution negative.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Becoming adnate or soon sessile, slightly constricted at the base, .7-1.2-1.6 mm in diam.. Margin: Lecideine/biatorine, indistinct (about 0.05-0.075 mm). Disk: Plane or weakly convex, black or dark brown (sometimes, when damaged ?), epruinose. Exciple: Carbonized; black (strongly), white, or dark green (rarely). Parathecium (proper excipulum): Brown or brownish red, inspersed with crystals (sometimes). Amphithecium (thalline excipulum): Present. Epithecium: Apical cells slightly swollen, bright green, dark green, or olive (rarely, when damaged ?). Hymenium: White or pale green (sometimes). Hypothecium: Brown or brownish red.

Ascospores: c. 8 per ascus, broadly ellipsoid or ovoid, 10-18 µm long, 6-10 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-dichloro-3-O-methylnorlichexanthone, 4,5-dichloronorlichexanthone, arthothelin (2,4,5-trichloronorlichexanthone), asemone (= 4,5,7-trichloronorlichexanthone), atranorin, chloroatranorin, thiophanic acid (= 2,4,5,7-tetrachloronorlichexanthone), or thuringione (= 2,4,5-trichloro-3-O-methylnorlichexanthone), of the following substance class(es): xanthones.

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

(report generated 04.Okt.2007)

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