Fenouilia yizhou Xiang, He, Lu & Chen, 2025

Xiang, Hong Quan, Lu, Yi Zhi, He, Yue Ming, Li, Chong Ye, Gao, Han, Lv, Ang Song & Chen, Hui, 2025, Twenty-seven new species and four new genera of Gastropoda (Animalia: Mollusca) from plateau lake Quaternary sediments in Yunnan, southwestern China, Ecologica Montenegrina 84, pp. 48-71 : 62

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.

Figures

Figure 1. Map of the ancient lakes and rivers in the Yunnan Province, south-west China, showing the sampling sites.

Figure 2. (A) paratype, Paraprososthenia bronyaae sp. nov. (B) holotype, P. bicarinata sp. nov. (C) holotype, P. jinxi sp. nov. (D) holotype, P. geguoi sp. nov. (E) holotype, P. yunjian sp. nov. (F) holotype, P. yuanqin sp. nov. (G) holotype, Shuiyu rillionaae gen. et sp. nov. (H) holotype, S. multicostata gen. et sp. nov. (I) holotype, S. shiji gen. et sp. nov. (J) holotype, S. boyuwangi gen. et sp. nov. (K) holotype, S. xuchengweii gen. et sp. nov. (L) holotype, S. phoebe gen. et sp. nov. (M) holotype, S. quanyuzhangi gen. et sp. nov. (N) holotype, S. candida gen. et sp. nov. (O) holotype, Qilinia longfeicheni gen. et sp. nov. (P) holotype, Jullienia quan sp. nov. (Q) holotype, J. chengyuangongi sp. nov. (R) holotype, Fenouilia zihaozhaoi sp. nov. (S) holotype, F. yizhou sp. nov. (T) holotype, F. pluvia sp. nov. (U) holotype, F. gaorange sp. nov. (V) holotype, Lacunopsis chengjiang sp. nov. (W) holotype, L. luliangensis sp. nov. (X) holotype, Longhai zhongxian gen. et sp. nov. (Y) holotype, Gyraulus fuxianensis sp. nov. (Z) holotype, Xingyuan jiamingzhangi gen. et sp. nov. (ZA) holotype, X. zhihehongi gen. et sp. nov. Scale bars = 10 mm.

Figure 7. Shells of Fenouilia zihaozhaoi sp. nov. (A) holotype (B-C) paratype. Shells of F. yizhou sp. nov. (D) holotype (E-F) paratype. Shells of F. pluvia sp. nov. (G) holotype (H) paratype. Shells of F. gaorange sp. nov. (I) holotype (J) paratype. Scale bars = 10 mm.