Description: Like E. grandicula (described elsewhere) but with smaller spores (9.5-16&

371;m long), and smaller macroconidia (9.5-13&

371;m long), the latter forming tiny swellings on the bark — even smaller than ‘bark pimples’ (Arthopyrenia species). It grows on hazel. Rare: from the northern half of Ireland.

Key Identification Features:

• On the smooth bark of hazel: barely visible usually only as miniscule dots
• Discs (perithecia) have smaller spores than the similar E. grandicula; macroconidia (in swellings which resemble discs) are also smaller than in that species.

Original text submitted by Vince J. Giavarini

Distribution Map from NBN: Eopyrenula avellanae at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Eopyrenula avellanae at iNaturalist World Species Observations database.