A rare calciphilous species, characterized by a white to grey immersed thallus and dark red-brown to black (red-brown when wet) pruinose apothecia placed in deep holes. It grows on various types of calcareous rocks from lowlands to mountains. In Europe, it is widely distributed from the Mediterranean to the southern boreal zone. In the Czech Republic, there are historical records from Nedvědice and the Králický Sněžník Mts. Unverified recent records come from Bílé Stráně near Litoměřice and from the Javoříčský kras karst.
taxonomic classification:Ascomycota → Lecanoromycetes → Lecanorales → Lecideaceae → Clauzadea
Red List (Liška & Palice 2010):DD – data deficient
Red List (Malíček 2023):DD – data deficient
Occurrence in the Czech Republic
All records: 2, confirmed 0. One click on a selected square displays particular record(s), including their source(s).