First of all thank you very much for your suggestion and I apologize that I was not attaching the haplotype result.
For the question, the specimens in Nakhon Si Thammarat and Songkhla province are Phacaspis mitis only.
Unfortunately, other species in Phacaspis were not found in Thailand.
I am sending you the haplotype results as a word file.
The result showed that there are two groups of haplotype network. The first group is Songkhla (SK) and Nakhon Si Thammarat (NK).
The second group is Satun (ST), Krabi (KB), Phang-nga (PG) as well as Suratthani (S).
However, haplotype network is not enough for explanation the relationship.
I will analyze the data as your suggestion. Thank you so much.