Atla palicei

Atla palicei is a species of saxicolous (rock-dwelling), crustose lichen in the family Verrucariaceae. It forms a thin, blackish-brown to black growth with a scurfy appearance and a diffusely areolate pattern on its substrate. The lichen contains a complex mixture of photobionts, including an unidentified green alga and cyanobacteria from the genera Nostoc and Chroococcus. It is characterised by small hemispherical perithecia (averaging 0.46 mm in diameter) that emerge from small areolae, with each perithecium surrounded by a cuff-like structure. The species was formally described in 2008 based on specimens collected in Sweden, and has been tentatively reported from Finland, though with some molecular and morphological differences. It is found growing on calcareous rocks near streams at elevations between 410 and 650 metres....read more on Wikipedia.