Page last updated
Thu 17 July 2025

The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)

FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win!

Bivalvia | Unionoida | Hyrioidea

family HYRIIDAE Swainson, 1840
     synonyms (16 nomina) | cladomics

Global Distribution of the Hyriidae. The green wedge of the pie depicts the relative Recent species diversity of the family in the order Unionoida (93 of 1020).

The Hyriidae (93 Recent spp., 15 gen.) has a widely disjuct distribution in Australasia and South America. Historically, the subfamilial classification has followed this geographical partitioning. Our own phylogenetic work, however, has noticed the paraphyly of the Australasian lineages, and we have revised the classification of the Hyriidae accordingly.