"Margarya yangtsunghaiensis Tchang & Tsi, 1949" . "Tchangmargarya yangtsunghaiensis"@en . "Tchangmargarya yangtsunghaiensis is a species of large operculate freshwater snail, an aquatic gastropod mollusk in the family Viviparidae, the river snails.This species previously was assigned to Margarya, and is the type species of Tchangmargarya."@en . "IUCN3.1" . . . . . "CR" . . .