Size and shape divergence of copulatory structures between populations and/or species.

Shape divergence is represented by Procrustes distances between groups (significance was assessed with 10,000 permutations rounds). Size divergence is expressed as the elevation difference between static allometries of parameres and pygidial flaps in pairwise comparisons between groups; only divergences that were significant (sequential Bonferroni correction applied) are reported. The comparison between pygidial flap size of IT and NC was significant after removing O. illyricus.**P*P