A freshwater mussel species reflects a Miocene stream capture between the Mekong Basin and East Asian rivers

Freshwater mussels belonging to the genus Cristaria Schumacher, 1817 (Bivalvia: Unionidae) are widespread from Mongolia Indochina while range of one species, C. plicata (Leach, 1814), covers two biogeographic subregions, i.e., East Asian (Amur River Vietnam) and Sundaland (Mekong basin). We present here a taxonomic revision nominal taxon Anodonta bellua Morelet, 1866 which was described Mekong (Lake Tonle-Sap, Cambodia) but is currently considered synonym . obtained molecular data for newly collected representatives Mekong’s tributaries in Laos, were found as divergent species-level phylogenetic clade within that distant Nevertheless, comparative morphological morphometric studies did not reveal any significant differences between these congeners. Our time-calibrated modeling reveals split (Mekong) clessini (East Asia) probably occurred mid-Miocene (15.8 Ma) may reflect an ancient stream capture Basin rivers.