FIGURE 2 in Description of a new species of crested newt, previously subsumed in Triturus ivanbureschi (Amphibia: Caudata: Salamandridae)

FIGURE 2. Genetic data for Triturus ivanbureschi sensu lato presented in Wielstra et al. (submitted) illustrate the sharp geographical overturn between the genotypes representing its two constituent species. Panel (a) shows the 67 sampled populations as dots with the colored background representing a rough distribution outline of the two species based on nuclear DNA. Populations are colored according to the mtDNA type present; western populations of Triturus anatolicus sp. nov. possess mtDNA of Triturus ivanbureschi sensu stricto. Those populations harboring individuals showing introgression and genetically admixed individuals based on nuclear DNA (as defined below) are highlighted. Panel (b) shows a Structure plot representing Q scores with which the 428 sampled individuals were allocated to two different species (k = 2 was the optimal number of gene pools inferred in the Structure analysis). The individuals are ordered based on the Q score with which they are allocated to T. ivanbureschi sensu stricto, from high to low values. Individuals allocated to their respective species with Q ≥ 0.987 are considered genetically pure. Individuals showing introgression are defined as being allocated to a species with 0.987> Q> 0.85 and genetically admixed individuals as being allocated to either species with Q ≤ 0.85. Those individuals that are not genetically pure are highlighted in panel (b). Note that nuclear introgression is geographically asymmetric.