This inconspicuous lichen is characterized by an areolate, grey-brown to dark brown thallus and the presence of stictic acid. It occurs on siliceous rocks in mountainous and boreal regions. In Central Europe, it is very rare, known from only a handful of localities. In the Czech Republic, R. gyrizans was first found in 2022 on the Kozí hřbety ridge in the Krkonoše Mountains, where it grew together with Lecidea lactea on quartzite rock.
Literatura: Hertel H. & Rambold G. (1990): Zur Kenntnis der Familie Rimulariaceae (Lecanorales). – Bibliotheca Lichenologica 38: 145–189. /// Malíček J. & Steinová J. (2025): Contribution to lichen biota of the Krkonoše Mountains, the highest Czech mountain range. – Herzogia 38: 308–335.
taxonomic classification:Ascomycota → Lecanoromycetes → Trapeliales → Trapeliaceae → Rimularia
Occurrence in the Czech Republic
All records: 1, confirmed 1. One click on a selected square displays particular record(s), including their source(s).