Irish lichens

Collemopsidium foveolatum
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 Ám.

A maritime species, found on limpet and barnacle shells and on coastal calcareous rocks.

Pyrenocollema halodytes       Collemopsidium foveolatum

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

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