Porpidia macrocarpa (DC.) Hertel & A. J. Schwab

Data Set Maintenance: Data set standard item. Data set author(s): Hertel H. (C. Kainz, 03-06-03). Data set not revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Porpidia. Synonyms: Lecidea macrocarpa (DC.) Steud., Haplocarpon macrocarpum (DC.) Choisy, Huilia macrocarpa (DC.) Hertel; Porpidiaceae Hertel & Hafellner (1984) @EXCL@ Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Basionym: Patellaria macrocarpa DC. in Lam. & DC., Fl. Franc., ed. 3, 2: 347 (1805).

Taxonomic Literature: Taxonomic notes: Thallus cortex c. 20-30 µm thick; upper cell layer unpigmented, occasionally incrusted with rusty coloured granules; epinecral layer not developed;
Medulla I-;
Hypothallus grey, obvious between the areoles;
Paraphyses branched and anastomosing, 1.5-1.8 µm, apices 3-4 µm thick;
Asci c. 80-90 x 18-20 µm;
Pycnidia immersed;. Rambold G., Biblioth. Lichenol. 34: 1-346 (1989).

Biogeography: Continent: Asia-Temperate, Australasia, Europe, and Northern America.

Ecology: Biotroph; lichenized; episubstratic (rimose); substrate non-calciferous.

Thallus: Separate thallus parts.1 mm thick. Thallus Size and Differentiation: Large (up to 60 mm diam.). Upper Surface: Grey (to rusty coloured), plane (irregularly shaped, with rough surface, c. 0.4 mm, max. 0.6 mm diam.).

Ascocarps: Forming independently from the host thallus or mycelium (round to roundish, dispersed), soon sessile, strongly constricted at the base, 12-15 per cm², .8-1-(1.6) mm in diam.. Margin: More or less excluded, distinct (at first), 150-200 µm wide. Disk: Strongly convex or weakly convex, black (matt), epruinose. Exciple: Hyphae 3-8 µm wide; black or brown. Epithecium: Apical cells olive ('olivaceous', 12-20 µm tall). Hymenium: 95-120 µm high; white (I+ blue, Iconc.+ blue). Subhymenium: 20-25 µm high; white. Hypothecium: Brown (to dark brown, up to 300-350 µm thick).

Ascospores: Ellipsoid, 14-21 µm long, 7-10.5 µm wide.

Conidia: 9-10.7-14 µm long.

Secondary Metabolites: Not detected.

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

(report generated 04.Okt.2007)