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Hyriidae is a taxonomic family of pearly freshwater mussels, aquatic bivalve molluscs in the order Unionida. This family is native to South America, Australia, New Zealand and New Guinea.[1] Like all members of that order, they go through a larval stage that is parasitic on fish (see glochidium).
The classification recognized by Banarescu (1995)[2] uses three subfamilies. This family contains eighteen genera.
Genera within the subfamily Hyriinae, from South America, include:
Genera within the subfamily Cucumerunioninae, from Australasia, include:
Genera within the subfamily Velesunioninae, from Australasia, include:[citation needed]