Description:
Thallus obscure grey or fawnish often somewhat reddish-brown, wrinkled-plicate to bullate or inflated-subsquamulose, or subareolate-granular, diffract, 1-4 cm diam.
Apothecia sessile or innate, black or reddish-black, often red-brown at margins, matt, epruinose, 0.2-2.0 mm diam., solitary or confluent, often crowded, disc plane to subconvex, surface often furrowed, margins thin, brown, or lacking. Epithecium red-brown, 8-14 m thick. Hymenium pale yellow-brown, 50-65 m tall. Paraphyses thick, dense, red-brown and capitate, to 5 m thick at apices. Hypothecium colourless. Ascospores ellipsoid, 8-10 4-5 m.
Chemistry : C–, K+ red, Pd–. Norstictic acid detected by TLC.

Distribution:
Australasia and southern South America (Falkland Islands and Isla de los Estados).

Notes:
Only the form with innate, concave apothecia (var. concava (Mll. Arg.) Fryday) is known from South America where it is quite frequent. However, Kantvilas & Elix (2007 - Lichenologist 38: 135-141) considered this form to be within the variation of the species and did not afford it any taxonomic rank.

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Thallus and apothecia


var. concava