| Nominal Species (n = 4) | Present allocation (n = 4) | Ref. |
|---|---|---|
| Pseudobranchus axanthus Netting & Goin, 1942 | Pseudobranchus axanthus | 19 |
| Siren intermedia Barnes, 1826 | Siren intermedia | 19 |
| Siren lacertina Österdam, 1766 | Siren lacertina | 19 |
| Siren striata LeConte, 1824 | Pseudobranchus striatus | 75097 |