Order: Verrucariales       Family: Verrucariaceae Species: Verrucaria latebrosa (Verrucaria aethiobola) Growth type crustose Photos: Upland stream, Ballingeary, Co. Cork, SW Ireland. Pale greyish-brown to dark brown lightly cracked thallus with small projecting perithecia, apex often slightly flattened. Asci 8-spored, spores (23-)25-28(-29.5) x (8-)10.5-13(-14) µm. Very variable, the thalli on drier or more exposed rocks can be thinner and with few cracks. Found on unshaded or shaded siliceous rocks in freshwater rivers, streams and lakes.

Verrucaria latebrosa (Verrucaria aethiobola) April 2012