Gyraulus fuxianensis Chen, Xiang, He, Li & 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 : 67

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-2111-FFA2-A6AF-FF2EFD288E68
treatment provided by	Felipe
scientific name	Gyraulus fuxianensis Chen, Xiang, He, Li & Chen
status	sp. nov.

Treatment

Gyraulus fuxianensis Chen, Xiang, He, Li & Chen View in CoL , sp. nov.

https://zoobank.org/ urn:lsid:zoobank.org:act:24B1068C-72E2-442B-AA34-943DE6A4B5F5

Fig. 2 Y View Figure 2 , Fig. 10 View Figure 10 A-C

Material examined. Holotype. XHQ 24012501, shell height: 4.0 mm. Haijing , Lake Fuxian, Yuxi City, Yunnan Province, China, 24°37′22″N, 102°51′32″E, January 2025, collected by Yue- Ming He, Hong-Quan Xiang and Chong-Ye Li. GoogleMaps

Paratypes. 2 specimens, XHQ 24012502-03, shell height: 3.8–4.5 mm, January 2025, locality and habitat same as holotype.

Diagnosis. Shell discoidal; each teleoconch whorls with one strong keel at suture; outer lip rather thin, inner lip thickened; umbilicus opened.

Description. Shell small, thin, light gray, translucent, discoidal; apex blunt, with 3.5 whorls, each teleoconch whorls with one strong keel at suture; aperture large, ovate, outer lip rather thin, inner lip thickened; umbilicus opened.

Differential diagnosis. In terms of shell morphology, G. fuxianensis sp. nov. differs from all other species in the Gyraulus , horizontally, the protoconch of G. fuxianensis sp. nov. is positioned at the upper end of the teleoconch, while in Gyraulus , the protoconch is located lower than or at the same level as the height of the teleoconch, which effectively distinguish it from other species of the genus.

Etymology. The specific name "fuxianensis " is derived from the name of the lake where the species is found. We suggest the Chinese common name as “ 抚仙ŭDz ”.

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

Systematics

Subclass Heterobranchia Gray, 1840

Superfamily Lymnaeoidea Rafinesque, 1815

Family Lymnaeidae Rafinesque, 1815

Subfamily Lymnaeinae Rafinesque, 1815