Description: Recorded from west Cork, west Galway and Dublin, O. glaucomaria is lichenicolous on the thallus of Lecanora rupicola (described elsewhere). The discs are black, rimmed and round in shape. Spores are three-septate.

Key Identification Features:

• Grows on Lecanora rupicola, sometimes forming arcs on the thallus of the host
• Disc black with a rim; spores three-septate.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Phacographa glaucomaria at iNaturalist World Species Observations database.