Caloplaca nivalis

Lendemeriella nivalis is a species of muscicolous (moss-dwelling), crustose lichen in the family Teloschistaceae. It can be found in various cold-climate locations including Greenland, Svalbard, Ukraine, and throughout mid to high latitudes of the Northern Hemisphere. First discovered and described in 1853, this organism forms a thin, skin-like or granular crust that ranges from pale to dark grey in colour as it spreads over its moss host. The lichen's reproductive structures (apothecia) appear as small, round discs measuring up to 0.7 millimetres across, featuring a distinctive combination of orange and grey colouration with an outer grey rim containing algal cells and an inner orange border. Over its long scientific history, this species has been reclassified numerous times and known by at least ten different scientific names before receiving its current designation in 2020....read more on Wikipedia.