I am not sure how much you can help me with these images found on a dead tree presumably Quercus sp. The fungus manifests itself as widespread black stromata forming large irregular patches often in longitudinal patterns. The surface is minutely bumped by almost-microscope pycnidia. 

I have not collected a specimen, but I can if revisit and collect, nonetheless  the cross section of the stroma reveals some data that might be helpful

So to conclude I assume this is  a  Biscogniauxia sp. and wonder if from the photos we can determine the species - maybe Biscogniauxia mediterranea  ?

Tnx