A new species of  Pincerna  Preston, 1907 from China (Gastropoda: Caenogastropoda: Alycaeidae)

Pincerna yaanensis, a new species of terrestrial microsnail, is described from Yaan City, Sichuan Province, China. It differs from its congeners in having the following combination of characters: denser ribs on region from the beginning of the teleoconch to the beginnig of the differently ribbed region along the suture, columellar lip reflected throughout, covering umbilicus, large shell size, differently ribbed area before the constriction and the breathing tunnels short. The discovery of this species has greatly expanded the distribution range of the genus Pincerna in China.

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