Bilimbia lobulata

This is a lichen I re-examined and after several hours was glad I did as the outcome turned out to be different from the first. Description wise it's a granular thallus with black .75mm lecideine apothecia that are merging to create larger looking apothecia. It's growing on the top side of a brick wall. If you remove some of the lichen you can see that the underside is white. An apothecia section reveals 3-septate ascospores measuring 15µm x 4µm (too small for sabuletorum). The hymenium is brown measuring up to 90µm in height.

Bilimbia lobulata