Devon lichens 2 - Brown lichen on concrete

Devon lichens 2 - Brown lichen on concrete

Observation - Devon lichens 2 - Brown lichen on concrete. Description: Growing on a concrete wall, dark brown crustose lichen with a cracked thallus and some slightly lighter brown areas. Possibly Acarospora?

Growing on a concrete wall, dark brown crustose lichen with a cracked thallus and some slightly lighter brown areas. Possibly Acarospora?