Description: This seashore lichen occurs in the seaweed zone and has a thin dark brown, black-warted, black-ridged thallus. The minute discs (perithecia) have a concaved, sunken top. Spores are one-septate, between four and eight/ascus. It has been compared to a brown-coloured Verrucaria striatula. In Ireland, the species is known from near Dingle, County Kerry.

Key Identification Features:

• Lichen of the seaweed zone of the shoreline; thallus thin and brown
• Discs perithecia, spores one-septate 11.5–18µm long.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Collemopsidium elegans at iNaturalist World Species Observations database.