2025/05/14 by Guoyi Zhang, Xing-Xiao Wang · 1 voice
Agricultural and Biological Sciences · #Invertebrate Taxonomy and Ecology #Mollusks and Parasites Studies #Mycorrhizal Fungi and Plant Interactions
paper · pdf · doi:10.1080/13235818.2025.2494894
openalex publication_date 2025/05/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/15
Pseudobuliminus (Eupulmonata: Camaenidae) has traditionally been delimited to exclusively contain species with conoidal shells, but questions regarding its monophyly have remained. Extensive morphometric analyses conducted on almost all Pseudobuliminus species from China indicate that possessing a conoidal shell alone is not a sufficient character to establish genus membership. It was previously shown that Pseudobuliminus species from Shandong Province lack a dart sac and possess a flagellum. We found the same reproductive characteristics in additional species from eastern and northern China, such as P. buliminoides from Nanjing, Jiangsu Province, and P. beijingensis n. sp., described herein from Fangshan, Beijing Province. In contrast, species from western China differ from this configuration by having a dart sac but lacking a flagellum. Based on partial sequences of the mitochondrial 16S rRNA and the nuclear spacer ITS2, our molecular phylogeny demonstrates that the species from eastern and northern China form a clade. We conclude that the combination of lack of a dart sac and presence of a flagellum is a morphological synapomorphy shared by the members of this taxonomic lineage.