Figure 1 Distribution ofC. hainanense on Hainan Island and sample collection information map. (a) Location of Hainan Island in China, (b) Distribution ofC. hainanense on Hainan Island.

2.2. Materials

During 2019-2021, 35 C.hainanen samples were continuously collected from Hainan Island. They were divided into six regions according to the geographical origin of the samples, namely, the Bawangling population (samples BWL_1-BWL_8), the Jianfengling population (JFL_1-JFL_5), the Luoshan population (DLS_1-DLS_10), Huishan population (HS_1-HS_6), Wuzhishan population (WZS_1-WZS_3), Baishaling population (BSL_1-BSL_3). The division of regional populations, latitude, longitude, and the number of samples are shown in Table 1.
Table 1 The list of information for C. hainanense sample collection on Hainan Island