| Nominal Species (n = 9) | Present allocation (n = 7) | Ref. |
|---|---|---|
| Cephalothrix arenaria Hylbom, 1957 | Cephalothrix arenaria | 19 |
| Procephalothrix arenarius Gibson, 1990 | Cephalothrix hongkongiensis | 940 |
| Planaria linearis Rathke, 1799 | Cephalothrix linearis | 930 |
| Cephalothrix major Coe, 1930 | Cephalothrix major | 3477 |
| Cephalothrix notabilis Iwata, 1954 | Cephalothrix notabilis | 907 |
| Cephalothrix orientalis Gibson, 1990 | Cephalothrix orientalis | 3477 |
| Procephalothrix orientalis Gibson, 1990 | Cephalothrix orientalis | 3477 |
| Procephalothrix simulus Iwata, 1952 | Cephalothrix linearis | 907 |
| Cephalothrix spiralis Coe, 1930 | Cephalothrix spiralis | 3477 |