Shuiyu phoebe Xiang, He, Gao & 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 : 57

Shuiyu phoebe Xiang, He, Gao & Chen , gen. et sp. nov.

https://zoobank.org/ urn:lsid:zoobank.org:act:7B8F9C00-E92A-4F1E-B781-042C4509262D

Fig. 2 L , Fig. 4 M

Material examined. Holotype: XHQ 24011201, shell height 21.0 mm. Yanjiang Town , Qilin District, Qujing City, Yunnan Province, China, 25.48°N, 103.87°E, June 2022, collected by Yue-Ming He and Hong-Quan Xiang ( Fig. 1 ).

Paratypes: 2 specimens, XHQ 24011202-03, shell height 19.0- 19.3 mm, June 2022, locality and habitat same as holotype.

Diagnosis. Shell small, elongate conic, white, with seven whorls, the whorls with axial ribs, aperture ovate, outer lip reflexed.

Description. Shell small, translucent, but solid, elongate conic, white, with seven spiral whorls, including two protoconch whorls, teleoconch whorl inflated; third whorls smooth; fourth to fifth whorls with a weak keels; other whorls with six axial ribs, body whorl swollen. Apex obtuse. Umbilicus narrow and small, base white and with one obviously 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. multicostata gen. et sp. nov. and S. boyuwangi gen. et sp. nov., Shuiyue phoebe gen. et sp. nov. with less axial ribs and fourth to fifth whorls with a weak keels. Compared with S. xuchengweii gen. et sp. nov., Shuiyue phoebe gen. et sp. nov. with axial ribs and inner lip thicker.

Etymology. The species name "phoebe " originates from a plant in China called Nanmu. We suggest the Chinese common name as " 楠木水玉Dz ".

Distribution and ecology. This species is only found in the lake sediments of Qilin District, 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 4. Shells of Shuiyu rillionaae gen. et sp. nov. (A) holotype (B-C) paratype. Shells of S. multicostata gen. et sp. nov. (D) holotype (E-G) paratype. Shells of S. shiji gen. et sp. nov. (H) holotype (I-J) paratype. Shells of S. boyuwangi sp. nov. (K) holotype. Shells of S. xuchengweii gen. et sp. nov (L) holotype. Shells of S. phoebe gen. et sp. nov. (M) holotype. Shells of S. quanyuzhangi gen. et sp. nov. (N) holotype. (O-P) paratype. Shells of S. candida gen. et sp. nov. (Q) holotype. (R-S) paratype. Scale bars = 10 mm.