Thallus crustose, epilithic, olivaceous-brown, minutely granular (non-corticate). Algae Trentepohlia
Ascomata perithecia, numerous, black

Ecology and distribution. On siliceous stones. Known from a single collection (with P. austroatlantica) on granitic rocks at 275 m on West Falkland.

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Thallus and Perithecia