| Nominal Species (n = 4) | Present allocation (n = 4) | Ref. |
|---|---|---|
| Echiurus abyssalis Skorikow, 1906 | Echiurus abyssalis | 19 |
| Echiurus antarcticus Spengel, 1912 | Echiurus antarcticus | 19 |
| Lumbricus echiurus Pallas, 1767 | Echiurus echiurus | 429 |
| Echiurus torulobotus Salvini-Plawen, 1972 | Echiurus torulobotus | 19 |