Spatial genetic structure determined by a Bayesian assignment analysis using STRUCTURE. A. Posterior assignment probabilities of 160 individuals of Campylopterus curvipennis to an optimal number of K = 2 and K = 3. Each individual is represented by a vertical line that is partitioned into K colored sections, with the length of each section proportional to the estimated membership coefficient. B. Mean log probability of the data (L(K) ± SD) over 10 runs for each K value (left Y axis) and values of ΔK calculated according to Evanno et al.  (right Y axis).