Myriospora scabrida (Hedl. ex H. Magn.) K. Knudsen & L. Arcadia

Myriospora scabrida occurs usually on siliceous rock in full sun at a variety of elevations and is frequent in Fennoscandia with scattered reports from France, Germany, and Italy. Its brown areoles develop into squamules 1–5 mm wide, which sometimes become lobulate and imbricate. It can be quite variable in appearance. Its diagnostic character is elevated apothecia in a parathecial crown up to 90 µm wide and the color of the thallus with dark reddish-brown disc. The hymenium is usually 140–170 µm tall with paraphyses 1–1.5 mm wide and the algal layer is interrupted.

It is probably rare in the Czech Republic. It was collected in the Hrubý Jeseník Mts, Jizerské hory Mts and in Český kras on limestone. The limestone substrate is unusual but M. scabrida has been collected in Fennoscandia growing on calcareous soil. Some Acarosporaceae can grow on both calcareous and non-calcareous rock.

Literature: Westberg M., Crewe A.T., Purvis O.W. & Wedin M. (2011): Silobia, a new genus for the Acarospora smaragdula complex (Ascomycota, Acarosporales) and a revision of the group in Sweden. – Lichenologist 43: 7–25.

taxonomic classification:

Ascomycota Lecanoromycetes Acarosporales Acarosporaceae Myriospora

Red List (Malíček 2023):DD – data deficient

Occurrence in the Czech Republic

All records: 3, confirmed 2. One click on a selected square displays particular record(s), including their source(s).


record after the selected year
record before the selected year
records without date
Doubtful and erroneous records are not displayed.
credible record
doubtful record
erroneous record
record without revision

Altitude preferences

Distribution Timeline

Substrate type

Substrate preferences

© Botanický ústav AV ČR, v. v. i. 2020–2024