Paraprososthenia jinxi 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 : 51

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

https://zoobank.org/ urn:lsid:zoobank.org:act:7F8FCF68-8BEA-4926-9213-D47826BD25D6

Fig. 2 C , Fig. 3 F-G

Material examined. Holotype: XHQ 24010301, shell height 25.0 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 24010302, shell height 24.0 mm, June 2024, locality and habitat same as holotype.

Diagnosis. Shell small, elongate conic, white, with seven whorls, the whorls with two very obvious keels, aperture ovate, inner lip thickened.

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

Differential diagnosis. Compared with P. costata , P. constricta , P. gredleri and Parapyrgula coggini , Paraprososthenia jinxi sp. nov. shell surface with very obvious axial growth lines, whorls with two very obvious keels and lacks nodules. Compared with P. bronyaae sp. nov., Paraprososthenia jinxi sp. nov. shell surface with very obvious axial growth lines and wider shell. Compared with P. bicarinata sp. nov., Paraprososthenia jinxi sp. nov. with two very obvious keels and wider shell.

Etymology. The species name " jinxi " is a Chinese term referring to the ebb and flow of the vast ocean, symbolizing the passage of time and the changes in the world. We suggest the Chinese common name as " 今汐川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.