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Table 1

Sampling information of S. chuatsi, S. kneri and the intermediate form.

Collection location Collection date Number of samples

S. chuatsi S. kneri Intermediate form
Lake Dongting, Yangtze River 2018.9 7 8 10
Lake Poyang, Yangtze River 2018.3 8 8 9
2018.9 8 10 29
Amur River 2018.2 8    
Pearl River 2018.7   6  
Total 31 32 48

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