See text 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.

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]