Description: With a similar thallus to L. fuscoatra and Immersaria athroocarpa, L. paupercula is an alpine species of siliceous boulders on mountain peaks above 500m, where the habitats of these taxa are unlikely to overlap. The cracked, shiny thallus is dark reddish-brown with medulla I+ violet. Spot tests K± yellow, Pd± orange. In Ireland, the species is known only from County Kerry.

Key Identification Features:

• Thallus dark red-brown, shiny, cracked, medulla I+ violet, K± yellow, Pd± orange
• On siliceous rock above 500m.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Lecidea paupercula at iNaturalist World Species Observations database.