Description: Dots on hard limestones are always a challenge for the lichenologist. This species of Verrucaria has a cracked, whitish to pale brown thallus that is often raised above the adjacent rock and ringed by a dark brown line. The discs (perithecia) form prominent projections; the spores are in the range 11-21 x 6-9µm. V. dufourii is similar but has a sunken apex to the discs. Northern and western Ireland.

Key Identification Features:

• Always on hard limestones; thallus visible as pale brown cracked stain, ringed by a brown line often raised above the weathered rock
• Perithecia prominent; spores without distinctive perispore.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Parabagliettoa pinguicula at iNaturalist World Species Observations database.