A species resembling the common L. carpathica, but differing in the ±granular-papillose (or slightly pustular) thallus surface. The thallus of L. asema is C+ orange due to the content of thiophanic acid and commonly also other xanthones. The yellowish colour of the thallus is diagnostic at first sight, but in shaded sites it is usually grey-white.
Lecidella asema is a typical lichen of rather basic silicates found along the seashore. However, it also appears at various elevations inland. In Europe, the lichen is abundant mainly in the Atlantic-Mediterranean area. In the Czech Republic, the species is rare. Recently, it has been found in the Blanský les and Slavkovský les Mts, on granulite and serpentinite. In the past, it was recorded only on schist near Mrákotín in the Telč region (Nádvorník 1961, as Lecidea subincongrua).
Literature: Nádvorník J. (1961): Příspěvky k lišejníkovému rodu Lecidea (Ach.) Th. Fr. v ČSSR. – Preslia 33: 308–314.
taxonomic classification:Ascomycota → Lecanoromycetes → Lecanorales → Lecanoraceae → Lecidella
most frequented synonyms:Lecidea distratulaRed List (Liška & Palice 2010):DD – data deficient
Red List (Malíček 2023):C1 – critically endangered
Occurrence in the Czech Republic
All records: 3, confirmed 3. One click on a selected square displays particular record(s), including their source(s).