Evolution of genes involved in the unusual genitals of the bear macaque, Macaca arctoides

Genital divergence is thought to contribute to reproductive barriers by establishing a "lock-and-key" mechanism for reproductive compatibility. One such example, Macaca arctoides, the bear macaque, has compensatory changes in both male and female genital morphology as compared to close relatives. M. arctoides also has a complex evolutionary history, having extensive introgression between the fascicularis and sinica macaque species groups. Here, …