Map showing all 42 sites along an eastern European megatransect. Trioza urticae samples were selected from 18 sites (red points) along the transect. Three major natural geographic barriers are indicated, and the four regional partition of sites (southern, central, northern, arctic) referred to in the genetic analyses are shown.

  Part of: Wonglersak R, Cronk Q, Percy D (2017) Salix transect of Europe: structured genetic variation and isolation-by-distance in the nettle psyllid, Trioza urticae (Psylloidea, Hemiptera), from Greece to Arctic Norway. Biodiversity Data Journal 5: e10824.