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

Shuiyu quanyuzhangi Xiang, He, Lu & Chen, gen. et sp. nov. https://zoobank.org/ urn:lsid:zoobank.org:act: F6DA073A-4699-4DDF-89EE-374A054EDB89 Fig. 2 M, Fig. 4 N-P Material examined. Holotype: XHQ 24011301, shell height 10.0 mm. Tangchi Street [汤池NJñ], Yiliang County [ffa县], Kunming City, Yunnan Province, China, 24.96°N, 103.00°E, June 2024, collected by Hong-Quan Xiang (Fig. 1). Paratypes: 2 specimens, XHQ 24011302-03, shell height 9.0-10.0 mm, June 2024, locality and habitat same as holotype. Diagnosis. Shell small, long pyramidal, white, with seven whorls, the whorls with two row of large nodules, aperture ovate, outer lip reflexed. Description. Shell small, but solid, long pyramidal, white, with seven spiral whorls, including two protoconch whorls, teleoconch whorl inflated; third to fourth whorls with a weak keels; fifth whorls with a row of large nodules; other whorls with two row of large nodules, nodules are composed of intersection of thick spiral keels and many axial ribs, body whorl 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., S. shijiae gen. et sp. nov. and S. multicostata gen. et sp. nov., S. quanyuzhangi gen. et sp. nov. with less axial ribs. Compared with S. boyuwangi gen. et sp. nov. and S. phoebe gen. et sp. nov., S. quanyuzhangi gen. et sp. nov. shell surface with nodules. Compared with S. xuchengweii gen. et sp. nov., S. quanyuzhangi gen. et sp. nov. with long pyramidal shell and body whorl with two row of nodules and the nodules of S. quanyuzhangi gen. et sp. nov. are smaller. Etymology. The species name " quanyuzhangi " originates from a biology enthusiast in Xinxiang, Henan. We suggest the Chinese common name as " 张氏水玉Dz ". Distribution and ecology. This species is only found in the lake sediments of Lake Yangzonghai in Kunming, Yunnan Province.