Thallus thick, rimose-areolate; cream-brown or yellow-orange; medulla I-.
Apothecia 0.5-1.5 mm diam., numerous, ±regularly scattered, solitary , innate, rounded, ▒ flat; margin excluded; disc dark brown, paler when wet, matt, glabrous ; epithecium 6-12 Ám thick, pale brown; exciple ±excluded and barely visible; hymenium dark brown, 90-105 Ám tall. Paraphyses slender, only slightly swollen at apex, branched and anastomosing. Ascospores 22-25 x 6-9 Ám.
Conidiomata: usually present along the thallus margin adjacent to other thalli; conidia filiform, 25-30 x 1 µm.

Chemistry: Confluentic acid.

Ecology and Distribution: On ±inundated, siliceous rocks. South America. Isla Wellington (west coast of Chile), Falkland Islands.

Remarks: Microscopically, the apothecia of this species resemble those of Porpidia superba. However, it is readily distinguished from that species by its innate apothecia, smooth pale brownish thallus, and filiform conidia.

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Thallus and apothecia

Apothecia Section