| Nominal Species (n = 5) | Present allocation (n = 5) | Ref. |
|---|---|---|
| Synapta gracilis Selenka, 1867 | Synapta gracilis | 485 |
| Synapta incerta Théel, 1886 | Synapta incerta | 485 |
| Synapta oceanica Lesson, 1830 | Synapta oceanica | 488 |
| Psolidothuria octodactyla Thandar, 1998 | Psolidothuria octodactyla | 485 |
| Synapta recta Semper, 1868 | Synapta recta | 485 |