Diplodon is a genus of freshwater pearly mussel, an aquatic bivalve in the Hyriidae family.
The genus includes the following species:
- Diplodon dunkerianus
- Diplodon expansus
- Diplodon fontaineanus
- Diplodon granosus
- Diplodon pfeifferi
Diplodon websteri is a synonym for Cucumerunio websteri.