Description: Virtually identical to D. alboatrum (described elsewhere), but the thallus is usually thinner and can be powdery. Discs are pronounced, soon convex and thickly pruinose. It grows on Caloplaca teicholyta. Its species status is in doubt. Western Ireland, County Galway.

Key Identification Features:

• Thallus thin and often powdery; more so than in typical D. alboatrum
• Lichenicolous on Caloplaca teicholyta.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Diplotomma murorum at iNaturalist World Species Observations database.