This pyrenocarpous lichen has a submerged light thallus, conspicuous dark perithecia and big 1-septate spores. It grows in both natural and anthropogenic habitats, on shaded calcareous substrates, such as on stone walls and calcareous sandstones. The European distribution of A. salweyi is Atlantic-Mediterranean. Therefore, in the central Europe it is very rare. In the Czech Republic, it was reported only once, by A. Vězda in 1955, from a calcareous-siliceous paragneiss rock in Šumárník, in the Hrubý Jeseník Mts.
Literature: Vězda A. (1961): Der Formenkreis der Arthopyrenia conoidea (Fr.) Zahlbr. in der Tschechoslowakei. – Acta musei silesiae 10: 131–138.taxonomic classification:
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