A less conspicuous Toninia species, whose thallus consists of brown areoles or even squamules, the epithecium is grey (K+ violet) and the hypothecium colourless. In the field, it resembles a Lecidea species. It occurs on sun-exposed calcareous and dolomite rocks in continental areas of the temperate zone. It grows on cyanobacterial colonies during initial developmental stages (Nimis et al. 2018). The species is rather rare in Europe, known from only small number of localities in various countries (Timdal 1992, Guttová & Palice 2002, Nimis et al. 2018). In the Czech Republic, is has been reported from few localities on sun-exposed calcareous rock near Hardegg in the Podyjí National Park.
Literature: Timdal E. (1992): A monograph of the genus Toninia (Lecideaceae, Ascomycetes). – Opera Botanica 110: 1–137. Nimis P. L., Hafellner J., Roux C., Clerc P., Mayrhofer H., Martellos S. & Bilovitz P. O. (2018): The lichens of the Alps – an annotated checklist. – Mycokeys 31: 1–634. Guttová A. & Palice Z. (2002): Lišajníky Národného parku Muránska planina II – Javorníková dolina. – Výskum a ochrana prírody Muránskej planiny 3: 53–68.taxonomic classification: most frequented synonyms:Toninia pennina
All records: 2, confirmed 2. One click on a selected square displays particular record(s), including their source(s).