Lacunopsis luliangensis 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 : 64-65

Lacunopsis luliangensis Xiang, He, Lu & Chen , sp. nov.

https://zoobank.org/ urn:lsid:zoobank.org:act:706BB7A1-F702-4654-8A4F-873BED5509DA

Fig. 2 W , Fig. 8 D-F

Material examined. Holotype: XHQ 24012301, shell height 10.0 mm. Zhongshu Town , Luliang County, Qujing City, Yunnan Province, China, 25.02°N, 103.66°E, June 2022, collected by Yue-Ming He and Hong-Quan Xiang ( Fig. 1 ).

Paratypes: 2 specimens, XHQ 24012302-03, shell height 10.8-11.0 mm, June 2022, locality and habitat same as holotype.

Diagnosis. Shell small, ovate-conic, white, with five whorls, the whorls with nine axial ribs, aperture ovate, outer lip thickened.

Description. Shell small, but solid, ovate-conic, white, with five spiral whorls, including two protoconch whorls, teleoconch whorl inflated; Second to third whorls smooth; other whorls with three spiral ribs, body whorl swollen. Apex obtuse. Umbilicus narrow, 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 thickened.

Differential diagnosis. Compared with L. yuxiensis , L. luliangensis sp. nov. shell with less spiral ribs and whithout nodules. Compared with L. yunnanensis , L. luliangensis sp. nov. with ovate-conic and bigger shell.

Etymology. The species name "luliangensis " is derived from the Chinese name of its locality, which is Luliang County in Qujing City, Yunnan Province. We suggest the Chinese common name as " LaŪŘDz ".

Distribution and ecology. This species is only found in the lake sediments of Lake Lulianghai in Luliang, 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 8. Shells of Lacunopsis chengjiang sp. nov. (A) holotype (B-C) paratype. Shells of L. luliangensis sp. nov. (D) holotype (E-F) paratype. Scale bars = 10 mm.