Description
Thallus effuse, very thin, forming a grey varnish-like crust over bryophytes. Photobiont chlorococcoid, cells globose, 10-15 µm diam.
Apothecia black, lecideine, orbicular, adnate, flat even when old, 0.7-1.2 mm diam., proper margin persistent, barely raised above the level of the disc, 0.05 mm wide. Excipulum composed of radiating hyphae with enlarged cells (10-15 µm wide), 140 µm thick, inner 50 µm dark blue (K+ brighter; HCl+ blue, N+ magenta; Cinereorufa–green), outer with dark red (K+ brighter, HCl+ brown, N+ orange-brown; Atra–red) pigment on outer walls of the hyphae, continuous under hypothecium. Hymenium hyaline, 120-150 µm, streaked with dark red (Atra–red) pigment; epihymenial zone dark red-purple (Atra–red), 10-15 µm thick; subhymenium dark red (Atra–red) above with thin dark blue-green (Cinereorufa–green) zone below, 35-40 µm. Paraphyses simple, readily separating, 2.0-2.5 µm thick, apices swollen to 5.0–6.5 µm with dark red (Atra–red) pigmented cap. Hypothecium 70 µm thick, hyaline to pale blue-green, composed of periclinally arranged hyphae with large yellow oil inclusions. Asci cylindrical, 80–85 x 17–20(–40) µm, Bacidia-type. Ascospores hyaline, 1-septate, allantoid, (40–)45(–50) x 7–8(–10) µm, (2–)4(–8)/ascus.
Conidiomata not observed.

Chemistry: not tested.

Distribution and Ecology: Known only from the subantarctic Îles Kerguelen, where it has been collected from several localities between 100–700 m above sea-level. All collections are from terricolous bryophytes or Azorella selago cushions. Associated lichens include species of Pannariaceae.

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Thallus and apothecia


Apothecial section


Ascospore