A conspicuous and well-recognizable species of the genus Toninia sensu lato. It is characterized by pink, densely pruinose thalli, sometimes with spiky appearance. The thalli sometimes form rosettes and the individual squamules are rounded or lobe-shaped.
It is a saxicolous species, which prefers natural vertical calcareous rock outcrops, often growing in association with cyanolichens or cyanobacteria. It typically occurs in crevices where rainwater accumulates. It is rather rare, mainly distributed in Europe, most of its localities lie in the Alps, the Carpathians and the Pyrenees. A single record from the Czech Republic used to be known – from Jurassic limestones of the Kotouč hill near Štramberk (Suza 1943) which were mined off after the World War II. So, the species is currently considered extinct here. This occurrence represents the edge of its distribution area in the Carpathians.
Literature: Timdal E. (1992): A monograph of the genus Toninia (Lecideaceae, Ascomycetes). – Opera Botanica 110: 1–137. Suza J. (1943): Meridionální vlivy v lišejníkové flóře Západních Karpat. – Věstník Královské české společnosti nauk 16 (1942): 1–47. Palice Z. (2017): Lichen Biota of the Czech Republic. – In: Chytrý M. et al. [eds], Flora and Vegetation of the Czech Republic, Plant and Vegetation 14: 177–192.taxonomic classification:
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