Atla praetermissa

Atla praetermissa is a species of saxicolous (rock-dwelling) crustose lichen in the family Verrucariaceae. It forms a very thin, mesh-like thallus that varies in colour from grey to dark green, sometimes with a brownish tint. The species is characterised by small, spherical reproductive structures and hyaline spores with a distinctive internal wall structure. First described in 2008, this lichen grows specifically on calcareous rocks near streams and in waterfall spray zones at elevations between 165 and 955 metres. Although known only from Scandinavia (Sweden and Norway), experts suggest it may have a wider distribution but remains overlooked due to its inconspicuous nature and specialised habitat requirements....read more on Wikipedia.