Acarosporaceae Sarcogyne regularis Growth type crustose Chemical results negative Thallus thin or immersed, apothecia sometimes +/- sunken. The red-brown or blackish discs are usually bluish-grey pruinose. Asci contain 100-200 spores, the spores simple, 3-5(-6) x 1.5-2 µm. Micro photo below. A pioneer species on calcareous walls, concrete, pebbles and on abestos-cement. Most frequent in lowland areas. Similar: Clauzadea monticola. Discs reddish when wet but never pruinose. Asci 8-spored.

Microscope photograph

Sarcogyne regularis
Studland, Dorset. June 2013, January 2015