Medionidus is a genus of freshwater mussels, aquatic bivalve mollusks in the family Unionidae.
| Medionidus | |
|---|---|
| |
| Medionidus conradicus | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Order: | Unionida |
| Family: | Unionidae |
| Tribe: | Lampsilini |
| Genus: | Medionidus Simpson, 1900 |
Species within the genus Medionidus edit
- Medionidus acutissimus (Alabama moccasinshell)
- Medionidus conradicus
- Medionidus parvulus (Coosa moccasinshell)
- Medionidus penicillatus (gulf moccasinshell)
- Medionidus simpsonianus (Ochlockonee moccasinshell)
- Medionidus walkeri
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