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Lecidea lygomma var. crassilabra (Müll. Arg.) Hertel & Rambold

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:-; Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Symb. Bot. Upsal. - Lecidea crassilabra Müll.Arg.: Müller-Argau J., Hedwigia 32: 127-128 (1893); type specimen label data: Australia, Victoria, Mt Hotham, 6000 ft, 1890, F. v. Mueller (G, holotype).

Taxonomic Literature: Taxonomic notes: Most likely a chemical race of Lecidea lygomma. Rambold G., Biblioth. Lichenol. 34: 205-207 (1989); Brodo I.M., Mycotaxon 56: 153 (1995).

Biogeography: Alpine. Continent: Northern America (Canada: Queen Charlotte Isl.), Southern America (Chile), Africa, and Australasia (Australian Alps, New Zealand).

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

Thallus: Not subdivided parts, 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 0-.3 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted. Thallus Outline: Margin concolorous the thallus centre. Upper Surface: White or lemon (citrine), plane or convex; not sorediate; without thalloconidia thalloconidia.

Medulla: Iodine reaction in Lugol's solution negative.

Ascocarps: Forming on the pro- or hypothallus, soon sessile, not constricted or slightly constricted at the base, 20-300 per cm², .35-1-(1.3) mm in diam.. Margin: Not flexuose, persistent or excluded, 50-150 µm wide, epruinose. Disk: Plane to strongly convex, black, epruinose, 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, cell pigment reacting with 10% HCl (in H2O). Hymenium: 50-85 µm high; white; iodine reaction: Lugol’s positive. Subhymenium: 20-35 µm high; white. Hypothecium: Brown or dark brown.

Ascospores: Ellipsoid, (8)-9.7-13.3-(15) µm long, (4.5)-4.3-6.7-(8) µm wide; wall not ornamented.

Conidia: (9)-11.5-12.5-(14) µm long.

Secondary Metabolites: Present, stictic acid.

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

(report generated 04.Okt.2007)

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