Epitrix is a taxonomically complex genus, with 162 described species all over the world, and most likely many more undescribed species. Due to taxonomic difficulties identifying the species, there is considerable uncertainty regarding which species that feed on cultivated crops. At least 13 Epitrix species are known to damage the tubers of potato, which is the crop of concern in northern Europe. At least five of those Epitrix species (E. hirtipennis, E. fasciata, E.cucumeris, E. papa and E. pubescens) have established themselves outside their native range, spurring concerns that they may spread further and potentially cause damage in new areas where potato is cultivated. It is unknown how most of these species have moved from country to country, but there have been several interceptions of unknown Epitrix species in shipments of ware potatoes.