Trimmatothelopsis schorica (N.V.Vodop.) K.Knudsen, Tsurykau & Urbanav.

Trimmatothelopsis schorica grows in full sun or half shade at elevations below 500 m on dolomite, limestone, marlite, chert, speculate, and opuka, a calcareous sedimentary sandstone in the Czech Republic. It was described from Siberia and recently from North America as Acarospora sphaerosperma but is only known in Europe from Russia, Ukraine and central and northwestern Bohemia, where it is rare.

The species is typical of the genus Trimmatothelop­sis. It has the globose apothecia with a hymenium 170–200 μm high, thin paraphyses (1 μm wide), inconspicuous brown discs up to 0.3 mm wide, and conidia 4–5 × 1–1.5 μm. It has spherical ascospores 7–10(–12) μm wide. The white areoles are usually less than 0.4 mm wide. It has been mistaken for a Thelocarpon or possible morphotype of A. murorum, which does not occur in the Czech Republic.

Literature: Knudsen K. & Kocourková J. (2016): Acarospora sphaerosperma (Acarosporaceae), new to Europe and the Czech Republic, and Acarospora irregularis, new for Austria. – Herzogia 29: 465–472. Knudsen K., Urbanavichus G., Hodková E., Tsurykau A. & Kocourková J. (2022): Acarospora schorica is a Trimmatothelop­sis. – Herzogia 35: 467–474.

taxonomic classification:

Ascomycota Lecanoromycetes Acarosporales Acarosporaceae Trimmatothelopsis

most frequented synonyms:Acarospora sphaerosperma, Trimmatothelopsis sphaerosperma

Red List (Malíček 2023):DD – data deficient

Occurrence in the Czech Republic

All records: 5, confirmed 5. One click on a selected square displays particular record(s), including their source(s).


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