维基百科
Margarya is a genus of large operculate freshwater snails, aquatic gastropod mollusks in he family Viviparidae. [3]
These snails appear to be endemic to lakes in Yunnan Province in the China.
Shell surface smooth except for growth lines. Apex eroded, left three or four whorls. Body whorl inflated, the height of body whorl is about 68% of height. Snout, neck, sides of foot and dorsal surfac