Description: The thallus of H. spodomela consists of a scurfy-granular mixture of algal and jelly-like cyanobacterial cells giving the whole a dirty-black appearance. Discs (0.3-0.6mm diam.) are dark brown to black with a grey rim (exciple) speckled with a blackish deposit. The disc epithecium is a dull olive green. Its habitat is base-enriched siliceous rock, especially granite, near the coast. In Ireland, it has been recorded from Counties Galway and Kerry.

Key Identification Features:

• Black scurfy thallus with black discs and green epithecium
• Slightly base-enriched granitic rocks; near the sea.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Halecania spodomela at iNaturalist World Species Observations database.