﻿AbstractCentral China harbors the native dart-sac-bearing camaenidsLaeocathaica. The genus is revised and seven new species are proposed based on museum material and newly collected specimens. This work confirmed that mostLaeocathaicaspecies have restricted habitats. The comparison of the dart sac apparatus among the dart-sac-bearing camaenid genera indicated the importance of the presence of the proximal accessory sac that might be analogous to the membranous/muscular sac surrounding the proximal dart sac and/or the distal region of the vagina near the atrium, which also plays a significant role in the diagnosis ofLaeocathaicaspecies based on its number, symmetry and position on the dart sac. Species with similar shell morphology were studied using geometric morphometric methods to detect variations in shell shape. A molecular phylogenetic analysis based on 16S and ITS2 sequence data of partialLaeocathaicaspecies and many other dart-sac-bearing taxa suggested thatLaeocathaicamight be monophyletic. Furthermore, the present phylogeny indicated thatStilpnodiscus,Cathaica,Bradybaena, andPseudobuliminusmight be polyphyletic and therefore the taxonomy of dart-sac-bearing camaenids in this region requires a thorough revision. This work reconfirms that the Southern Gansu Plateau is important as a hotspot for malacodiversity conservation on the Chinese mainland.