| Nominal Species (n = 3) | Present allocation (n = 3) | Ref. |
|---|---|---|
| Blackfordia manhattensis Mayer, 1910 | Blackfordia manhattensis | 19 |
| Blackfordia polytentaculata Hsu & Chang, 1962 | Blackfordia polytentaculata | 8278 |
| Blackfordia virginica Mayer, 1910 | Blackfordia virginica | 3477 |