Distribution of T. cilbanus (8 localities), I. marmoratus loxanus (35 localities) and I. marmoratus marmoratus (36 localities) in the bidimensional space generated by the two first PC of a PCA analysis. Each point in the graph represents a single sampling locality. Coordinates of centroids for each species have been calculated as the average X and Y coordinates of the points included in the corresponding clouds. T. cilbanus cloud has been highlighted in light red.