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(Map updated: 11 August 2009)

This small species forms thin circular crusts of tiny squamules on soft, stony calcareous soils. The convex squamules can be lobed or granular; red-brown concave discs are frequent. In Ireland, it is present in Counties Kerry and Cork and was formerly known from Benbulbin, County Sligo.

Key characteristics

• Thallus thin, crustose-squamulose with proliferating lobes forming circular patches on compacted calcareous soils
• Discs common, red-brown, concave.

Original text submitted by Vince J. Giavarini