| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Unicolax anonymous (Vervoort, 1965) |
Central Atlantic | 0.08 | |
| Unicolax collateralis Cressey & Cressey, 1980 |
Central Atlantic and the Mediterranean | 1.1 | |
| Unicolax mycterobius (Vervoort, 1965) |
Western Central Atlantic, the Mediterranean and the Pacific | 0.14 |