A rare minute boreal lichen growing on slowly decaying coniferous wood. In the catalogue of the lichens of the Czech Republic, its earlier name Biatora symmictella was accidentally given as a synonym of the unrelated Lecanora symmicta. Considering published data, only a single historical record is reliable; it was found by V. Kuťák on a snag in the Těsný důl valley (aka Klausův důl) in the Krkonoše Mts (Kuťák 1926, as Biatora symmictella). The other records mentioned in the catalogue are less likely due to their ecology and require revision. The oldest record of the species in the Czech Republic represents an interesting and unique illustration by August Corda (regardless of the uncertainty of its identity) but without a location specification (Corda 1839, as Agyrium caesium). The species is rare in Europe and there are no current records from the Czech Republic.
Literature: Corda A. C. I. (1838): Icones fungorum hucusque cognitorum. Tomus II . – Pragae: J. G. Calve, 43 p. Kuťák V. (1926): Příspěvek k lichenologii Krkonoš. – Preslia 4: 20–29.taxonomic classification: most frequented synonyms:Lecidea symmictella
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