Shuiyu quanyuzhangi 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 : 57-58

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.

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.