Note: Haslberger et al. 2016 show that the present taxon comprises at least two separate species. They also discuss the problematic nomenclature that has been created in this taxon by previous inadequate neotype selections and misidentifications. Clearly, this species complex requires a thorough revision and I therefore do not follow here any of the previous nomenclatural changes, but use here provisionally the traditionally applied name "Pempeliella dilutella".