| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Simnia acicularis (Lamarck, 1810) |
Sharp shuttle shell | Western Central Atlantic | 17 |
| Simnia aequalis Sowerby, 1832 |
Southeast Pacific | ||
| Simnia spelta (Linnaeus, 1758) |
Keys simnia | North America and the Mediterranean Sea | |
| Simnia uniplicata Sowerby, 1848 |
Western Central Atlantic |