Description: This minute, gelatinous, granular-crustose lichen grows on shaded calcareous rocks in western Ireland. It resembles a miniaturised version of a soil-dwelling Leptogium. The dull red discs with yellow-brown exciple distinguish it from all lookalikes.

Key Identification Features:

• Like a miniature Leptogium with minute reddish discs on a granular thallus
• Below shaded pebbles, boulders, scree on limestone cliffs; associated with calcareous rocks.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Lemmopsis arnoldiana at iNaturalist World Species Observations database.