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Lecidea subfumosa (Arnold) Zwackh

Data Set Maintenance: Data set standard item. Data set author(s): Hertel H. (99-01-01). Data set not revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Lecidea. Synonyms:-; Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Zwackh W., Lich. Exs. 602 (1880) - Psora atrobrunnea var. subfumosa Arnold: Arnold F., Verhandl. Zool. Bot. Ges. Wien 26: 486, 1875; type specimen label data: Austria, Tyrolia: Kitzbühler Alpen, Kleiner Rettenstein, am Wege zum Roßgrubkogel, August 1873, F. Arnold (M; n.v.).

Taxonomic Literature: Taxonomic notes: Close to Lecidea atrobrunnea; variability of characters insufficiently known. Hertel, Biblioth. Lichenol. 58: 172-173 (1995).

Biogeography: Alpine. Continent: Europe (Au).

Ecology: Biotroph; lichenized; episubstratic; substrate non-calciferous.

Thallus: Areolate (primarily areolate), continuous throughout or dispersed along the periphery, continuous in the centre; lobes angular or rounded at the front; separate thallus parts.3-.6 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted to basally constricted. Thallus Outline: Margin concolorous the thallus centre. Upper Surface: Brown, plane to convex; not sorediate; without thalloconidia thalloconidia.

Upper Cortex: Epicortex present. Medulla: Iodine reaction in Lugol's solution negative to in Lugol's solution positive (weak).

Ascocarps: Soon sessile, slightly constricted to strongly constricted at the base, 5-40 per cm², .8-1.3-(2) mm in diam.. Margin: Not flexuose to slightly flexuose, persistent to excluded, 30-65 µm wide, epruinose. Disk: Plane to weakly convex to strongly convex, black, epruinose, without an umbo. Exciple: Paraplectenchymatous; hyphae 3-5 µm wide; grey; inspersed with crystals. Epithecium: Apical cells green to turquoise, cell pigment reacting with 10% HCl (in H2O), cell pigment HCl+ blue. Hymenium: 45-58 µm high; white or rarely pale green; iodine reaction: Lugol’s positive. Subhymenium: 18-35 µm high; white or rarely pale green. Hypothecium: Rarely brownish yellow or brown.

Ascospores: Oblong, (6)-8-10-(12) µm long, (2.8)-3.5-4.6-(5) µm wide; wall not ornamented.

Conidia: (7)-8-10-(12.5) µm long.

Secondary Metabolites: Present, stictic acid.

Spot Tests: Medulla: K –, C –, PD – or + deep yellow; ascocarp margin (in section): K –, C – disk: C – hypothecium: K – epihymenium: K –.

(report generated 04.Okt.2007)

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