Abstract: 　AIM: To furnish molecular genetic evidences for taxonomy of Gammatricula. METHODS: A total of 24 enzymes of 6 populations of Gammatricula songi and 1 population of Gammatricula chinensis collected from Kaihua County and Chunan County of Zhejiang Province were studied using horizontal starch gel electrophoresis. RESULTS: 29 loci were found. The percentages of polymorphic loci of G.songi populations were 6 9%-13 8%. All loci of G.chinensis were monomorphic. The Neis distance among G.songi populations did not exceed 0 12. The Neis distance between G.songi and G.chinensis was 0 73. CONCLUSION: The allozyme variations of inter G.songi are limited,but the allozyme variation between G.songi and G.chinensis is significant.

Key words: Gammatricula songi, Gammatricula chinensis, allozyme zymogram, genetic distance