A lichen with yellow to yellow-green areolate sorediate thallus, black apothecia and more or less arctic-alpine distribution. It grows on bare acidic soil among bryophytes or on plant debris on open stands from lowlands to mountains. It parasitises on the lichen genus Baeomyces when young but probably not always. In the Czech Republic, it is scattered in mountain areas, rare at lower elevations. According to Frisch et al. (2022), Arthrorhaphis citrinella represents a complex of various taxa. The most widely distributed species, A. vulgaris, has been genetically confirmed from the Czech area, too. A. citrinella s. str. may also occur here but revision of herbarium material is needed. From the similar A. alpina s. l., it differs in the absence of calcium oxalate crystals in the medulla and the spore type.
Literature: Frisch A., Ohmura Y., Holien H. & Bendiksby M. (2022): A phylogenetic survey of the ascomycete genus Arthrorhaphis (Arthrorhaphi¬daceae, Lecanoromycetes) including new species in Arthrorhaphis citrinella sensu lato. – Taxon 71: 936–962.
taxonomic classification:Ascomycota → Lecanoromycetes → incertae sedis Lecanoromycetes → Arthrorhaphidaceae → Arthrorhaphis
Red List (Liška & Palice 2010):LC – least concern
Red List (Malíček 2023):C3 – endangered
Occurrence in the Czech Republic
All records: 51, confirmed 30. One click on a selected square displays particular record(s), including their source(s).