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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: Zahlbruckner W., Ann. Mycol. 34: 166-167 (1936); type specimen label data: South Africa, Cape prov., inter Calvinia and Middlelos an saxa arenaria, P. van der Byl. 1114 (W, lectotype).

Thallus: Areolate (primarily areolate), continuous throughout; lobes angular at the front; separate thallus parts.1-.3 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted. Thallus Outline: Margin concolorous the thallus centre. Upper Surface: Verrucose, white @EXCL@ grey @EXCL@ brown, plane; not sorediate; without thalloconidia thalloconidia.

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

Ascocarps: Soon sessile, strongly constricted at the base, 10-60 per cm², .8-.9-(1.3) mm in diam.. Margin: Not flexuose @EXCL@ slightly flexuose, persistent, 40-70 µm wide, epruinose. Disk: Plane @EXCL@ weakly convex, black, epruinose, without an umbo. Exciple: Hyphae radiating outwards; 2.5-4.5 µm wide; grey; inspersed with crystals. Epithecium: Apical cells olive @EXCL@ green @EXCL@ turquoise, cell pigment reacting with 10% HCl (in H2O), cell pigment HCl+ blue. Hymenium: 40-50 µm high; white @EXCL@ lemon (citrine); iodine reaction: Lugol’s positive. Subhymenium: 20-30 µm high; white. Hypothecium: Brown @EXCL@ dark brown.

Ascospores: Oblong @EXCL@ cylindrical, (8.5)-10.3-11-(15) µm long, (3)-3.5-3.8-(4.5) µm wide; wall not ornamented.

Secondary Metabolites: Present, gyrophoric acid @EXCL@ lecanoric acid (traces).

Spot Tests: Medulla: K –, C – @EXCL@ + red, PD – ascocarp margin (in section): K – @EXCL@ + bluish red, C – @EXCL@ + red; disk: C – hypothecium: K – epihymenium: K –.

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