Fig. 4From: Repeated evolution of asymmetric genitalia and right-sided mating behavior in the Drosophila nannoptera species groupEvolution of sexual characters in the nannoptera species group. The cladogram was established based on the phylogeny of this study (Additional file 1: Figure S6), combined with data from Lang et al. (2014) [28]. AS, asymmetric states; S, symmetric states; nd, not determined, sp, spermathecae; rec, female seminal receptacleBack to article page