Leptolyngbya sieminskae Richter et Matula

Wet Spitsbergen island. The north shore of Hornsund fjord. Isbjørnhamna bay. Fuglebergsletta coast. Massive cyanobacterial mats in water, on bottom, surface of stones and among growing mosses at the edge of seepages.

Wet Spitsbergen island. The north shore of Hornsund fjord. Isbjørnhamna bay. Fuglebergsletta coast. Snowbed and surfaces with shallow hollows periodically supplied by rain water, covered with black and brown, thick ridge of cyanobacterial crust with Anthelidium juretzkiana and mosess.