| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Medionidus acutissimus (Lea, 1831) |
Alabama moccasinshell | North America | |
| Medionidus conradicus (Lea, 1834) |
Cumberland moccasinshell | North America | |
| Medionidus parvulus (Lea, 1860) |
Coosa moccasinshell | North America | |
| Medionidus penicillatus (Lea, 1857) |
Gulf moccasinshell | North America | |
| Medionidus simpsonianus Walker, 1905 |
Ochlockonee moccasinshell | East Pacific | |
| Medionidus walkeri (Wright, 1897) |
Suwannee moccasinshell | North America |