Modern Concepts on the Origin and Distribution of Acipenserids (Acipenseridae)

Abstract The current data on the place and time of origin Acipenseriformes family Acipenseridae, as well their distribution in connection with history development sea river basins, are summarized. supposed areas initial radiation long-term habitation were eastern Laurasia a part modern Chita Region, Eastern Central Mongolia, northern northeastern China. Asia should also be considered Acipenseridae. widespread was facilitated mainly by formation diadromous forms from primarily freshwater species, which is associated multiple transgressions regressions ocean. Modern potamodromous acipenserids probably formed result return anadromous to living fresh water; i.e., they secondarily species.