Description: Know only from east Donegal, this is a lichenicolous species inhabiting the thallus of Dermatocarpon miniatum on flushed, wet-lit rock, sometimes by streams or rivers. The slit-like discs can grow to 0.3mm wide; spores three-septate.

Key Identification Features:

• A lichenicolous lichen of Dermatocarpon miniatum
• Discs slit-like, black, breaking the surface; spores three-septate, 20–24µm long.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Opegrapha pulvinata at iNaturalist World Species Observations database.