Shuiyu boyuwangi Xiang, He, Lu & Chen 2025, gen. et sp. nov.

Shuiyu boyuwangi Xiang, He, Lu & Chen, gen. et sp. nov. https://zoobank.org/ urn:lsid:zoobank.org:act: 2771E1CC-1309-43B5-83C3-A4CBEDEF19CB Fig. 2 J, Fig. 4 K Material examined. Holotype: XHQ 24011001, shell height 11.0 mm. Yanjiang Town, Qilin District, Qujing City, Yunnan Province, China, 25.48°N, 103.87°E, June 2024, collected by Yue-Ming He and Hong-Quan Xiang (Fig. 1). Paratypes: 1 specimen, XHQ 24011002, shell height 10.5 mm, June 2024, locality and habitat same as holotype. Diagnosis. Shell small, smooth, elongate conic, white, with seven whorls, aperture ovate, inner lip thickened. Description. Shell small, translucent, but solid, elongate conic, white, with seven spiral whorls, including two protoconch whorls, teleoconch whorl inflated; third whorls with spiral ribs; other whorls shell surface smooth, with a keels on each whorls bottom; body whorl not swollen. Apex obtuse. Umbilicus narrow and small, base white and with one weak keel around umbilical area. Aperture ovate, less than half of shell in height, inner lip thickened and smooth, outer lip reflexed and thickened. Differential diagnosis. Compared with S. rillionaae gen. et sp. nov. and S. multicostata gen. et sp. nov., Shuiyu. boyuwangi gen. et sp. nov. shell surface smooth and growth lines. Compared with S. shiji gen. et sp. nov., Shuiyu boyuwangi gen. et sp. nov. with a keels on each whorls bottom. Etymology. The species name "boyuwang" originates from the name of a freshwater snail enthusiast in Beijing, China. We suggest the Chinese common name as " Ɨ氏水玉Dz ". Distribution and ecology. This species is only found in the lake sediments of Qilin District, Yunnan Province.