The results indicate that the Cristaria plicata (Leach) has two labials, the inner one and the outer one which has a ridged surface and a smooth surface on.

• 研究结果表明，褶纹冠蚌的唇瓣分为外唇瓣和内唇瓣，内外唇瓣相向一面具沟嵴，为褶皱面，相背一面表面光滑，为光滑面。