Family: Mycosphaerellaceae
Sphaerellothecium minutum Hafellner
A parasitic fungus found on the lichen Sphaerophorus fragilis (Hafellner's isotype was also found on this species). Sample sent to the Herbarium at the Royal Botanic Gardens, Kew
References:
Hafellner in: Herzogia 9: 760-762, 1993
Website: Fungi and Lichens of Great Britain and Ireland