Bythinella hansboetersi Glöer et Pešić, 2006 (Gastropoda: Rissooidea) in Bulgaria: Its Morphology, Molecular Distinctness, and Phylogeography

For five populations of Bythinella from Bulgaria the shell, penis, and female reproductive organs are figured and briefly described.27 sequences of COI (mtDNA), and 14 of ITS-1 (rRNA) are used to infer phylogenetic relationships among the studied populations and five Central European Bythinella species.All five studied populations belong to the same species: B. hansboetersi Glöer et Pešiæ, 2006, which is morphologically and molecularly distinct from B. austriaca earlier reported from Bulgaria.NCA analysis for the COI data revealed a pattern of restricted gene flow with isolation by distance.