Thelenella pertusariella (Nyl.) Vain.

A very inconspicuous lichen with pale minute perithecia and submuriform ascospores. It is found on two different substrates in the Czech Republic. First, it grows on decaying coniferous wood, e. g. tree stumps and lying trunks or branches and might also expand to tree bark or bryophytes. This ecotype was circumscribed from the Austrian Alps as Chromatochlamys vezdae (= Thelenella vezdae) and it occurs in mountains and cold ravines of sandstone rock formations in the Czech Republic. Second, T. pertusariella is epiphytic on smooth bark of shrubs and young deciduous trees, but also on moribund branches in wet lowland forests. The two ecotypes are morphologically indistinguishable, and there are also overlaps in the ecology (e. g. bark of dying branches), but they are still distinguished as two taxa in some countries (Nimis et al. 2018). The issue requires further molecular studies.

A similar species, T. modesta, with larger perithecia and more strongly muriform ascospores, occurring on subneutral bark of deciduous trees in well-lit stands, is not known in the Czech Republic. However, it might be expected in lower areas with mild and partly suboceanic climate.

Literature: Nimis P.L., Hafellner J., Roux C., Clerc P., Mayrhofer H., Martellos S. & Bilovitz P.O. (2018): The lichens of the Alps – an annotated checklist. – Mycokeys 31: 1–634.

taxonomic classification:

Ascomycota Lecanoromycetes Ostropales Thelenellaceae Thelenella

most frequented synonyms:Thelenella vezdae, Chromatochlamys vezdae

Red List (Liška & Palice 2010):NT – near threatened
Red List (Malíček 2023):C3 – endangered

Occurrence in the Czech Republic

All records: 30, confirmed 30. One click on a selected square displays particular record(s), including their source(s).

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Distribution Timeline

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© Botanický ústav AV ČR, v. v. i. 2020–2023