• Verrucaria ditmarsica Erichsen [39]
Verrucaria ditmarsica
Click on map to open large map in new window
(Map updated: 11 August 2009)

This is a species of intertidal rocks and stones, especially along sheltered shores and estuaries. Generally, the thin brown to blackish thallus lacks the cracked surface of similar species but has instead a fine stippling of small dark dots and ridges. The small (to 0.2mm diam.) spherical discs (perithecia) form shiny conical projections which sit almost on the surface like black beads. Throughout Ireland in suitable habitats.

Key characteristics

  • Largely an intertidal zone lichen of rocks and stones; thallus brown with microscopic dots and ridges
  • The black discs are evenly distributed and sit like beads on the surface.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Verrucaria ditmarsica Erichsen [39]. [In] LichenIreland. Accessed on 2019-08-25.