Acknowledgement:
This work was supported by National Natural Science Foundation of China
(Grant No. 41572163), the National Key R&D Program of China (Grant No.
2017YFA0603400), and National Natural Science Foundation of China (Grant
No. 41872080). Thanks to Yue Jiaojiao for assistance in taking photo of
the snails shells. Data for producing Figures 3–5 are available from
the data share website and the DOI is 10.6084/m9.figshare.12190485.