Phormidium uncinatum Gomont ex Gomont

North East Land island (Nordaustlandet). Prins Oscars Land. Duvefjorden bay. Innvika cove. Depotlaguna. East bank of Ringgåsvatnet lake. Vikvaktaren mountain, slope of western exposure. Polar desert. Gentle slope to the lake. Crusts of the mosses and algae, outside water, on a horizontal surface, in well-lit conditions. it's wet.

West Spitsbergen island. Nordenskiöld Land. Isfjorden bay south coast. Linne lake. The flat wet tundra.