Order: Verrucariales       Family: Verrucariaceae Species: Wahlenbergiella mucosa (Verrucaria mucosa) Growth type crustose. Photos: On coastal rock below HWM. Bantry, Cork, SW Ireland. Olive to dark green, uncracked, smooth, shiny thallus with white prothallus. Small immersed perithecia. Coastal on well-lit rocks from the centre of the littoral zone to LWM. Less frequent on sheltered shores and intolerant of silt. Chemical reactions negative. Sometimes parasited by Stigmidium marinum

Verrucaria mucosa. Bantry, Co.Cork. November 2008