Taxonomic reintroduction of (Taphrinales, Ascomycota) associated with as one of five well defined European species colonizing alders.

Phylogenetic analysis of four DNA regions (ITS, LSU, mtSSU and ) supported the existence of five European species which colonise in Europe. In addition to previously well-defined species, is, for the first time recognised, by molecular study as a species related to . Analysis of publicly available sequences of barcoding regions suggested that is only associated with and no other species colonize this host tree.