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On marble, Alt. c. 75 ft. Marble knolls near Waterpipe Beach, Signy Island. South Orkney Islands

Rock ledge, Alt. c. 200 ft. Above Paal Harbour, Signy Island. South Orkney Islands

On moist Drepanocladus uncinatus and soil at edge of stone stripe, Alt. 30 m. Port Jebsen, Signy Island. South Orkney Islands

Only found on a single moist rock ledge, growing on Drepanocladus uncinatus and Andreaea depressinervis, Avian Island, Henkes Islands, Fallieres Coast. Antarctic Peninsula, Fallieres Coast

Colonizing stones on recently deglaciated exposed ground, Alt. 150 m Jane Peak Col, Signy Island. South Orkney Islands

On dry rock, Alt. 20-200 m. West side Cape Hansen, Coronation Island. South Orkney Islands

On stones, Alt. 20-200 m. West side Cape Hansen, Coronation Island. South Orkney Islands

Dry stones, Alt. 35 m. Moraine Valley, Signy Island. South Orkney Islands

On stones and moss, Alt. 200 m. North end of Active Sound, Joinville Island. Antarctic Peninsula

Dry sandy soil on exposed col. Alt. 80 m. Between Factory Bluff and Rusty Bluff, Signy Island. South Orkney Islands

On dry silty soil on breccia blocks used as bird perches with Candelariella or Caloplaca sp. Alt. 25-30m. E side Lachman Crags, James Ross Island. Antarctic Peninsula

On N facing marble-banded cliff below giant petrel colony. Alt. 50m. Bluff to S of North Point, Signy Island. South Orkney Islands

On dry moss and soil. Alt. 35m. In valley S of St Martha Cove, James Ross Island. Antarctic Peninsula

On peaty soil on boulder above beach, Alt. 20 ft. Cummings Cove, Signy Island. South Orkney Islands

Exposed rock facing west, above lake, Alt. 20 ft. Opposite Jebsen Rocks, Amos Lake, Signy Island. South Orkney Islands

Wet rock face below moss banks, facing NW, Alt. 15 ft. Knife Point, Signy Island. South Orkney Islands

West facing rock ledges below petrel nests, Alt. 50 ft. SE of Factory Cove, Signy Island. South Orkney Islands

In crevices and depressions on top of exposed boulder, Alt. 30 ft. Cummings Cove, Signy Island. South Orkney Islands

Vertical face of exposed boulder, below moraine, facing west, Alt. 100 ft. Cummings Cove, Signy Island. South Orkney Islands

Top of exposed scree boulder, Alt. 200 ft. Cummings Cove, Signy Island. South Orkney Islands

Exposed rock crevice, Alt. 80 ft. South side of promontory opposite Lynch Island, Coronation Island. South Orkney Islands

On dead Drepanocladus uncinatus on moraine near skua nest, Alt. 100 m. 2nd Point south of Metchnikoff Point, Brabant Island. Antarctic Peninsula

Dry rocks near former nests of Giant petrels, Alt. c. 75 ft. above Knife Point, Signy Island. South Orkney Islands

Frequent on marble outcrops, Alt. c. 100 ft. near Gourlay Peninsula, Signy Island. South Orkney Islands

On soil accumulated on large boulder amongst block scree, Alt. 200 ft. Neny Island, Fallieres Coast. Antarctic Peninsula, Fallieres Coast

On Drepanocladus uncinatus, only specimen found, Coppermine Cove, Robert Island. South Shetland Islands

Slightly base-rich soil, Alt. c. 100 ft. North of The Wallows, Signy Island. South Orkney Islands

On Andreaea, Alt. c. 250 ft. North side of Observation Bluff, Signy Island. South Orkney Islands

On stones, Alt. c. 500 ft. north of Jane Peak, Signy Island. South Orkney Islands

Vertical cracks on cliff face above beach, Alt. 150 ft. Cummings Cove, Signy Island. South Orkney Islands

Exposed vertical cliffs above beach, facing north, Alt. 150 ft. Cummings Cove, Signy Island. South Orkney Islands

Exposed rocks on flat hilltop, Alt. 750 ft. Cape Hansen, Coronation Island. South Orkney Islands

On dry stones at periphery of penguin rookery, Alt. 100 m. c. 2 km. south-west of Nameless Point, Right Whale Bay. South Georgia

On north facing scree slope, Mount Flora, Hope Bay, north-east coast of Trinity Peninsula. Antarctic Peninsula, Trinity Peninsula, East Coast

On decaying moss, Alt. 30 m. Top of moraine near middle of Zenker Ridge, Moraine Fjord. South Georgia

On quartz-mica-schist boulders, Alt. 330 ft. Near summit of Observation Bluff, Signy Island. South Orkney Islands

On dry, vertical, north-facing rock, Alt. 50 ft. Berntsen Point, Signy Island. South Orkney Islands

On Patinigera, on low friable basalt outcrop on beach about 10 metres from sea, Alt. 6 m. South end of South Beaches, Byers Peninsula, Livingston Island. South Shetland Islands

On dry soil among boulders on east-facing slope. Alt. 350 m. The Tower, Admiralty Bay, King George Island. South Shetland Islands

On dead Festuca stems in dry crevice, Alt. 200 m. Hills to west of Gull Lake, Cumberland East Bay. South Georgia

On dry rock face, Alt. 20 ft. Above Knife Point, Borge Bay, Signy Island. South Orkney Islands

On piece of rope, Alt. 50 ft. North-west side of Berntsen Point, Borge Bay, Signy Island. South Orkney Islands

Steep, west-facing slope, Alt. 70 ft. Largest of Thule Islands, Borge Bay, Signy Island. South Orkney Islands

Low rock outcrops, Alt. 3 m. Extreme east end of South Beaches, Byers Peninsula, Livingston Island. South Shetland Islands

Stones on south facing scree slope, Alt. 5 m. South side of Vietor Rock, South Beaches, Byers Peninsula, Livingston Island. South Shetland Islands

Crevice on upper surface of rock, Alt. 327 ft. Summit of Scar Hills, Hope Bay. Antarctic Peninsula, Trinity Peninsula, East Coast

Small rock about 50 m. from sea, Alt. 3 m. Extreme east end of South Beaches, Byers Peninsula, Livingston Island. South Shetland Islands

On soil in crevices, Alt. 1550 ft. West side of ridge above Shingle Cove, Coronation Island. South Orkney Islands

West facing outcrop, over penguin rookery, Alt. 30 m. West end of Barton Peninsula, King George Island. South Shetland Islands

Endolithic in marble, Alt. 50 ft. Marble Knolls, Three Lakes Valley, Signy Island. South Orkney Islands