Distributed widely in the world,oyster is one of the most important maricultural species in China.Many confusions and disagreements exist in oyster composition and distribution because its shell shape is changing with different environment.In view of the fact mentioned above,such traditional methods as morphology and anatomy could not entirely solve its taxonomy.Nowaday,with the molecular biological technology being widely used in oyster discrimination,combination of morphological taxonomy with molecular phylogenetics has become an important way to solve the classification problem.This paper f...