Distribution maps for the four newly recorded Holarctic species. Coloured countries/states show the known distribution as in Fernandez-Triana et al. (2020) with confirmed additional data from this study. Dots show sampling locations of the species from our dataset and mined public data from the matching BINs from BOLD. In these cases, the countries/states were not coloured because we were not able to confirm this by studying the specimens. The coordinates used for the distributions can be reviewed in Suppl. material 5.