Eopyrenula avellanae Coppins

A tiny, inconspicuous crust without obvious marks of lichenization. It rarely forms small black perithecia, but minute pycnidia (<0.1 mm in diameter), producing characteristic, slightly melanized, 3-septate conidia, are often present. The species grows on smooth bark, especially on hazel trees, in humid habitats, such as in light scree forests. In Europe, it is regularly reported from the United Kingdom, otherwhere only a few records are known (e.g. from Ukraine). Eopyrenula avellanae has been found only twice in the Czech Republic, in the Křivoklát region (protected area Týřov), where it occurs on smooth bark of old hornbeam in a rain-protected place, together with the very rare Naetrocymbe fraxini, and on Fraxinus in the České středohoří Hills (Košťálov).

taxonomic classification:

Ascomycota Lecanoromycetes incertae sedis Lecanoromycetes Eopyrenula

Red List (Malíček 2023):C1 – critically endangered

Occurrence in the Czech Republic

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


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