Summary The genus Ferganoconcha was nominated by B.J. Chernyshev in 1937. Owing to the lack of the foundation for assigning this genus into the Unionidae, G.G. Martinson created the family Ferganoconchidae in 1956. He has agreed to take the hinge structure of the Chinese speci men of F. jorekensis Chernyshev from the western Inner Mongolia as one of the diagnestic features of the genus. This genus is essentially characterized by the external flat test without umbonal carina and the internal slendes lamellar teeth combined with poorly or un developed hinge plate.In spite of the different opinions in classifying Ferganoconcha into other divergent families the writer follows G.G. Martinson to maintain the Ferganoconchidae. The writer has also revised his own point of view and changed to regard the genus Arguniella Kolesnikov (1980) as another genus of the Ferganoconchidae. Although Chen Jinhua argued that Ferganoconcha should be fresh water anodont or toothless heterodont yet it might be proved to be a very rare and fantastic thought. Such thinking represents a retreat but not an advance in the investigations on the genus of Ferganoconchidae.