Fenouilia yizhou Xiang, He, Lu & Chen 2025, sp. nov.

Fenouilia yizhou Xiang, He, Lu & Chen, sp. nov. https://zoobank.org/ urn:lsid:zoobank.org:act: 2F9AE13C-403A-4142-BA67-FF158483E0A3 Fig. 2 S, Fig. 7 D-F Material examined. Holotype: XHQ 24011901, shell height 6.5 mm, Hongshatan [Ḧ沙滩], Lake Fuxian, Yuxi City, Yunnan Province, China, 102°51′55″E, 24°37′42″N, January 2025, collected by Yue-Ming He, Hong-Quan Xiang and Chong-Ye Li (Fig 1). Paratypes: 4 specimens (empty shell), XHQ 24011902-03, shell height 6.0– 6.2 mm, January 2025, locality and habitat same as holotype. Diagnosis. Shell small, conical, grey, with six whorls, shell surface smooth, aperture ovate, inner lip thickened. Description. Shell small, conical, grey, with six whorls. Shell surface smooth. Apex obtuse. Umbilicus closed. Aperture ovate. inner lip thickened and smooth, and outer lip smooth. Differential diagnosis. Compared with F. kreitneri, F. sinensis and F. undata, Fenouilia yizhou sp. nov. shell surface smooth, without axial ribs. Compared with F. zihaozhaoi sp. nov. sp. nov., Fenouilia yizhou sp. nov. shell smaller and surface grey. Etymology. The name of this species originates from the ancient geographical name "Yizhou" during the Western Han Dynasty in China. We suggest the Chinese common name as " ü州AEḄDz ". Distribution and ecology. This species is only found in the lake sediments of Lake Fuxian in Yuxi, Yunnan Province.