Description: Only known in Ireland from south Kerry, this is a coastal crustose lichen of sheltered underhangs and recesses in cliffs. It resembles P. circumscripta (described elsewhere) but lacks discs. The thallus soon becomes thickly sorediate. Like P. circumscripta, it tests C negative. This separates it from all allied taxa which may occur as companion species, the majority of which are C+ red.

Key Identification Features:

• Like P. circumscripta; never fertile, but is abundantly sorediate; in identical habitats
• Tests C negative, Pd+ yellow.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Ingaderia sorediata at iNaturalist World Species Observations database.