Description: This marine Verrucaria is very similar to V. ditmarsica (described elsewhere) but lacks the tiny dark dots (punctae) of that lichen. The narrowly ellipsoid spores (12–14 x 2–3µm) also help distinguish it. It should be searched for among barnacles along the shoreline at low tide. In Ireland, the species is known only from the north-east.

Key Identification Features:

• Thallus subgelatinous, dark brown without punctae
• Spores narrowly ellipsoid (longer that in V. ditmarsica).

Original text submitted by Vince J. Giavarini

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

iNaturalist: Verrucaria sandstedei at iNaturalist World Species Observations database.