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Despite belonging to the same tribe as the ‘bark pimple’ species, this lichen is not an epiphyte and grows exclusively on limestone. The grey immersed thallus with tiny, brown, half-embedded spherical discs (perithecia) containing narrow, oblong, one-septate spores could only be confused with Porina linearis which has spindle-shaped, three-septate spores. It occurs mostly on shaded, hard limestones. County Clare (The Burren); thinly scattered in the north.
Original text submitted by Vince J. Giavarini
|Simms, M. J., (2016). Arthopyrenia saxicola A.Massal.. [In] LichenIreland. |
http://www.habitas.org.uk/lichenireland/species.asp?item=15912 Accessed on 2017-03-31.