Figure 1.

Phylogenetic relationships and divergence times for seven species of the Drosophila subgenus. Six species (D. buzzatii, D. longicornis, D. mojavensis, D. arizonae, D. navojoa and D. mulleri) belong to the repleta species group and the chromosome 2 inversions fixed in the D. mojavensis and D. buzzatii lineages are indicated [51,52]. Primitive I is the most recent common ancestor of D. mojavensis and D. buzzatii [52]. D. virilis is the outgroup species and belongs to the virilis species group. Phylogenetic relationships and divergence times are taken from [38, D.C.S.G. Oliveira, F.C. Almeida, P. O'Grady, W.J. Etges, M.A. Armella and R. DeSalle, personal communication].