 About ten poisonings have been attributed to the species now grouped as "G. marginata" over the last century.What is now recognized as a single morphologically variable taxon named "Galerina marginata" was once split into five distinct species.Norwegian mycologist Gro Gulden and colleagues concluded that all five represented the same species after comparing the DNA sequences of the internal transcribed spacer region of ribosomal DNA for various North American and European specimens in "Galerina" section "Naucoriopsis".