Phylum: Ascomycota Family: Incertae Sedis
Vouauxiella lichenicola (Linds.) Petr. & Syd.
A widespread species hosted by the lichen genus Lecanora, which is very common.
References:
Sutton (1980) - The Coelomycetes: Fungi Imperfecti with Pycnidia, Acervuli and Stromata;
Smith, et al. , editors (2009) - The Lichens of Great Britain and Ireland