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Lecidea praenubila Nyl.

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

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: species. Lecidea. Synonyms: Lecidea atrocervina Vain.; Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Nylander W., Flora 55: 21 (1873); type specimen label data: Russia, Karelia onegensis, ad cataractum prope Koikari, granite, 1870, J.P. Norrlin (H-Nyl 15328, holotype).

Taxonomic Literature: Hertel H., Mitt. Bot. München 30: 311-312 (1991).

Biogeography: Montane and alpine. Continent: Europe (Br) and Southern America.

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

Thallus: Areolate (primarily areolate), continuous throughout, dispersed along the periphery, continuous in the centre, or dispersed throughout and distinctly seperate; lobes angular or rounded at the front; separate thallus parts.15-.5 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted. Thallus Outline: Margin concolorous the thallus centre. Upper Surface: Grey (dark; in eroded specim.) or brown (beige to dark brown), plane or convex; not sorediate; without thalloconidia thalloconidia.

Upper Cortex: Epicortex present. Medulla: Iodine reaction in Lugol's solution positive.

Ascocarps: Forming rarely on the pro- or hypothallus, soon sessile, not constricted or slightly constricted at the base, 4-100 per cm², .5-.8-(1.7) mm in diam.. Margin: Not flexuose or slightly flexuose, persistent or excluded, 20-100 µm wide, epruinose. Disk: Plane, weakly convex, or strongly convex, black, epruinose, pruina rarely scarce, without an umbo. Exciple: Hyphae radiating outwards; 3-5 µm wide; grey or brown; not inspersed with crystals or inspersed with crystals. Epithecium: Apical cells olive, green, or turquoise (Lecidea green), cell pigment reacting with 10% HCl (in H2O). Hymenium: 50-75 µm high; white; iodine reaction: Lugol’s positive. Subhymenium: 15-45 µm high; white. Hypothecium: Brownish yellow.

Ascospores: Ellipsoid, (8)-9.2-15.5-(17) µm long, (4)-5.3-8-(9) µm wide; wall not ornamented.

Secondary Metabolites: Not detected or normally present, norstictic acid or stictic acid.

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

(report generated 04.Okt.2007)

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