Order:       Family: Xanthopyreniaceae Species: Collemopsidium foveolatum Previously known as Pyrenocollema halodytes Growth type crustose. Photos: On barnacles. Snave beach, Cork, SW Ireland. Immersed thallus with very small perithecia (fruiting bodies) that are immersed in pits in the shells of barnacles or limpets. Perithecia are black, flattened or +/- convex. The asci are 8-spored, the spores 15-17.5 x 4-5.5 µm. A maritime species, found on limpet and barnacle shells and on coastal calcareous rocks.

     


Collemopsidium foveolatum on barnacles. Bantry Bay, Co. Cork. February 2009