Longhai zhongxian Xiang, He, Lv & 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 : 66

publication ID	https://doi.org/10.37828/em.2025.84.6
publication LSID	lsid:zoobank.org:pub:FCB98FB1-F97C-45AB-BFDF-E107D846C44D
persistent identifier	https://treatment.plazi.org/id/042F8A2D-2110-FFA3-A6AF-FE64FD2A8E55
treatment provided by	Felipe
scientific name	Longhai zhongxian Xiang, He, Lv & Chen
status	gen. et sp. nov.

Treatment

Longhai zhongxian Xiang, He, Lv & Chen View in CoL , gen. et sp. nov.

https://zoobank.org/ urn:lsid:zoobank.org:act:77B00173-D6BC-430B-9B4A-9866FAB747D9

Fig. 2 X View Figure 2 , Fig. 9 View Figure 9 A-C

Material examined. Holotype:XHQ 24012401, shell height 2.0 mm. Zhongshu Town , Luliang County, Qujing City, Yunnan Province, China, 25.02°N, 103.66°E, June 2021, collected by Yue-Ming He and Hong-Quan Xiang ( Fig. 1 View Figure 1 ). GoogleMaps

Paratypes: 2 specimens, XHQ 24012402-03, shell height 1.9-2.0 mm, June 2021, locality and habitat same as holotype.

Diagnosis. Shell small, discoidal, with four whorls. Shell surface with spiral ribs. Apex swelling and obtuse. Umbilicus opened. Aperture ovate. Body whorl with a keel and near the outer lip detached. Inner lip thickened and smooth, outer lip reflexed, thickened and smooth.

Description. Shell small, but solid, discoidal, with four whorls. Shell surface with spiral ribs. Apex obtuse. Umbilicus opened. Aperture ovate. Body whorl with a keel and near the outer lip detached. Inner lip and outer lip thickened, reflexed and smooth.

Etymology. The species name "Chengjiang" is derived from the ancient name of the lake where it is located "Chengjianghai" We suggest the Chinese common name as " 中涎AE海Dz ".

Distribution and ecology. This species is only found in the lake sediments of Lake Lulianghai in Qujing, Yunnan Province.

Systematics

Subclass Heterobranchia Gray, 1840

Superfamily Lymnaeoidea Rafinesque, 1815

Family Planorbidae Rafinesque, 1815

Subfamily Planorbinae Rafinesque, 1815