NeighborNet tree of clade CAS1 haplotypes of M. m. castaneus based on the mitochondrial DNA control regions. Tip labels from the four major subgroups were defined as CAS1A, CAS1B, CAS1C, and CAS1D and are indicated by light shading. A geographical group for SWC (southwest China) exists within CAS1D. KY, NZ, IND, JPN, CHN, TW, JM and SWC are used as abbreviations for Kenya, New Zealand, India, Japan, mainland China, Taiwan Island (China), and Jinmen Island (China), respectively.