Records of Mollusks of the Genus Caspiohydrobia Starobogatov 1970 (Gastropoda, Hydrobiidae) in Salt Rivers of the Caspian Lowland

Ten species of halophilic gastropods of the genus Caspiohydrobia are identified for the first time from the Lantsug and Gor’kaya Rechka salt rivers, tributaries of Lakes Elton and Baskunchak, respectively. The genus was previously known from the Caspian and Aral seas and some salt water bodies of Kazakhstan and Chelyabinsk and Kurgan regions. Since the hydrological and hydrochemical regimes of salt rivers critically depend on climatic conditions, Caspiohydrobia living in these habitats can be considered endangered.