Description: Easily overlooked for M. prasina, this small crustose species is very rare on acid bark in western oceanic woodlands. The granular, olivaceous thallus produces grey to grey-black discs with acicular or rod-shaped spores (to 35µm long). In Ireland, the species is currently known from one site in County Kerry.

Key Identification Features:

• Tiny grey-black discs (convex to globose) on a small, olivaceous thallus on acid-barked trees in western oceanic woodland
• Spores curved-acicular.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Micarea synotheoides at iNaturalist World Species Observations database.