Paraprososthenia yuanqin 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 : 52-53

Paraprososthenia yuanqin Xiang, He, Lu & Chen , sp. nov.

https://zoobank.org/ urn:lsid:zoobank.org:act:E7E63C90-2B39-4A8B-BBAC-317C3760E478

Fig. 2 F , Fig. 3 N

Material examined. Holotype: XHQ 24010601, shell height 14.0 mm. Yanjiang Town , Qilin District, Qujing City, Yunnan Province, China, 25.48°N, 103.87°E, June 2024, collected by Yue-Ming He and Hong-Quan Xiang ( Fig. 1 ).

Paratypes: 1 specimen, XHQ 24010602, shell height 15.2 mm, June 2024, locality and habitat same as holotype.

Diagnosis. Shell small, elongate conic, white, with seven whorls, the whorls with two row of large nodules, aperture ovate, inner lip thickened.

Description. Shell small, but solid, elongate conic, grey, with seven whorls, including two protoconch whorls, teleoconch whorl inflated; third to fourth whorls smooth; fifth whorls with a obvious keel and 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 whorls not swollen. Shell surface with very obvious axial growth lines. Apex obtuse. Umbilicus narrow and small, base with one obvious keel around umbilical area. Aperture ovate, inner lip thickened and smooth; outer lip thickened and reflexed.

Differential diagnosis. Compared with P. jinxi sp. nov., P. bronyaae sp. nov., P. bicarinata sp. nov. and P. geguoi sp. nov., Paraprososthenia yuanqin sp. nov. shell is wider and two row of large nodules. Compared to P. costata , P. gredleri and P. geguoi sp. nov., Paraprososthenia yuanqin sp. nov. has less whorls, fifth whorls with a obvious keel and a row of large nodules.

Etymology. The species name "yuanqin " originates from the online handle of a freshwater snail enthusiast in Guizhou Province, China.We suggest the Chinese common name as " ãẓ川ϐ ".

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 3. Shells of Paraprososthenia bronyaae sp. nov. (A, C) paratype (B) holotype. Shells of P. bicarinata sp. nov. (D) holotype (E) paratype. Shells of P. jinxi sp. nov. (F) holotype (G) paratype. Shells of P. geguoi sp. nov. (H) holotype (I-J) paratype. Shells of P. yunjian sp. nov. (K) holotype (L-M) paratype. Shells of P. yuanqin sp. nov. (N) holotype. Scale bars = 10 mm.