Tchangmargarya

Tchangmargarya is a genus of large operculate freshwater snails, aquatic gastropod molluscs in the family Viviparidae.

Taxonomy
Tchangmargarya originally was a subgenus of Margarya, and is elevated to a full genus based on molecular phylogeny and comparative morphology study.

Distribution
This genus appear to be endemic to Yangzong Lake and lakes in Stone Forest in Yunnan Province in the China.

Species
There are 3 extant species of Tchangmargarya:


 * Tchangmargarya yangtsunghaiensis (Tchang & Tsi, 1949) -type species (possibly extinct)
 * Tchangmargarya multilabiata Zhang & Chen, 2015
 * Tchangmargarya ziyi Zhang, 2017 (possibly extinct)