genus Unio


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Noun1.genus Unio - type genus of the family Unionidaegenus Unio - type genus of the family Unionidae  
mollusk genus - a genus of mollusks
family Unionidae, Unionidae - freshwater mussels found worldwide
pearly-shelled mussel - the pearly lining of the dark shells is a source of mother-of-pearl
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Remaining taxa were described or moved to the genus Unio and assumed to belong in the family Unionidae.