The thallus is often not evident.  The apothecia, often in small groups, have pruinose discs with well-developed white margins, which are regularly incised to form segments.

Other Myriolecis species

Calcareous rocks and mortar.  Often found on church walls.

Mainly south-east of a line from the Severn to the Humber. 

Common, especially in the east of the region.