Figure 1 in The limits of mtDNA analysis for determining the provenance of invasive species: a midwife toad example

Figure 1. Sampling of the common midwife toad (Alytes obstetricans). Samples from the Netherlands, Belgium and Germany were newly studied. The localities on the coast of the Netherlands (Meijendel and The Hague from top to bottom, enclosed by the pink dotted line) are introductions outside of the native range. Localities are color-coded according to the six major ND4 mtDNA clades, referred to as haplogroups by Gonçalves et al. (2015), to which they belong. Sampling details can be found in supplementary table S1.