Description: Look for this species hitching a ride on the back of the common limestone lichen Placynthium nigrum (described elsewhere) in natural habitats such as limestone pavement, quarries and cliffs. Compared to the widespread Toninia aromatica, this species has browner, overlapping squamules without white flecks. In Ireland, the species is scattered, though somewhat local.

Key Identification Features:

• On the thallus of cyano-lichens such as Placynthium nigrum
• Thallus scaly, brown, overlapping like roof shingles; no white flecks present.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Toniniopsis verrucarioides at iNaturalist World Species Observations database.