Lecidea signyana Hertel

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 or basionymous. Taxonomic rank: species. Lecidea. Synonyms:-; Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: H.Hertel ined.; type specimen label data: South Georgia, Husvik, 25 m alt., 10 January 1982, M. Vogel (M, holotype).

Biogeography: Alpine. Continent: Antarctica (South Georgia, South Orkneys).

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

Thallus: Areolate (primarily areolate), dispersed along the periphery, continuous in the centre or dispersed throughout and distinctly seperate; lobes angular or rounded at the front; separate thallus parts.1-.3 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted. Upper Surface: Pale grey or brown (beige to yellow brown), plane or convex; not sorediate; without thalloconidia thalloconidia.

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

Ascocarps: Forming on the pro- or hypothallus, soon sessile, not constricted or slightly constricted at the base, 80-150 per cm², .5-1-(1.3) mm in diam.. Margin: Not flexuose, persistent or excluded, 20-45 µm wide, epruinose. Disk: Plane, weakly convex, or strongly convex, black, epruinose, pruina scarce, without an umbo. Exciple: Grey; inspersed with crystals. Epithecium: Apical cells olive or green. Hymenium: 35-55 µm high; white; iodine reaction: Lugol’s positive. Subhymenium: 10-25 µm high; white. Hypothecium: Brown.

Ascospores: Ellipsoid or oblong, (7)-8.5-10-(13) µm long, (3)-4.2-4.8-(5.5) µm wide; wall not ornamented.

Secondary Metabolites: Present, 2'-O-methylperlatolic acid.

Spot Tests: Medulla: K –, C –, PD – ascocarp margin (in section): K –, C – disk: C – hypothecium: K –.

(report generated 04.Okt.2007)