东亚珠蚌，软体动物门-瓣鳃纲-真瓣鳃目-蚌科。维基百科Unio is a genus of medium-sized freshwater mussels, aquatic bivalve mollusks in the family Unionidae, the river mussels.Unio is the type genus of the family Unionidae.Species[edit]Species in the genus Unio include:Unio cariei - extinct [1]Unio crassus Philipsson, 1788 (Thick shelled river mussel) - near threatenedUnio mancus Lamarck, 1819Unio elongatulus C. Pfeiffer, 1825Unio pictorum (Linnaeus, 1758) (Painter's mussel)Unio tumidus (Swollen river mussel)Unio turtoniUnio valentianus Rossm?ssler, 1854References[edit]Jump up ^ Bouchet, P. & von Cosel, R. 1996. Unio cariei. 2006 IUCN Red List of Threatened Species. Downloaded on 7 August 2007. Unionidae