Description: Very tiny lichen always associated with the epiphyte Porina rosei on trees in old-established woodlands. In Killarney, County Kerry, it grows on oak. It is easily overlooked for bits of white shelly debris that has somehow become lodged in the thallus, but well-grown material shows this as a small bundle of white discs (lirellae) tightly knotted together. The spores are four- to six-septate.

Key Identification Features:

• A tiny white knot of curved discs (lirellae) like a fragment of snail shell among the thallus of Porina rosei
• Spores 15–20µm long, narrow, four- to six-septate with one of the middle cells enlarged.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Enterographa brezhonega at iNaturalist World Species Observations database.