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Lecanora mugambii Kirika, I. Schmitt, Fankhauser & Lumbsch
Nomenclature
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Family: LecanoraceaeGenus: Lecanora
SUMMARY
Mycobank 517789
Thallus thin to thick, verrucose to verruculose-bullate, whitish grey. Thallus surface smooth, epruinose, isidia and soredia absent. Prothallus not visible. Apothecia sessile, abundant, dispersed, plane or slightly convex, roundish, 0.6–1.5 mm diam. Apothecial margin lecanorine, concolourous with the thallus, persistent, thick, entire when young, becoming slightly verruculose or remaining entire, disc grey to grey-brown with a thick, granulose, whitish grey to bluish grey pruina. Amphithecial cortex distinct, gelatinous, hyaline, inspersed with small crystals, uniform, 15–20 µm thick. Amphithecium with large crystals. Parathecium hyaline, 10–15 µm thick, with small crystals. Epihymenium red-brown to brown, 15–20 µm thick, granulose with coarse crystals soluble in KOH. Hymenium, subhymenium and hypothecium hyaline. Paraphyses sparingly branched and not thickened apically. Asci of Lecanora-type, 8-spored. Ascospores non-septate, hyaline, broadly ellipsoid to subglobose, 11–15 x 7–10.5 µm. Pycnidia immersed in verrucae, blackish with filiform conidia. Spot tests: K+ yellow, C–; KC–, P+ yellow, UV+ blue. Secondary chemistry: alectoronic acid [major], atranorin [submajor], chloroatranorin [minor], physodic acid [minor], usnic acid [submajor], and unidentified alectoronic acid derivatives [minors].