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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==
Distribution
This genus appear to be endemic to Yangzong Lake and lakes in Stone Forest in Yunnan Province in the China. ==Species==
Species
There are 3 extant species of Tchangmargarya:(possibly extinct) • Tchangmargarya multilabiata Zhang & Chen, 2015 • Tchangmargarya ziyi Zhang, 2017 (possibly extinct) ==References==
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