| Nominal Species (n = 4) | Present allocation (n = 3) | Ref. |
|---|---|---|
| Oneppus denticulatus Evdonin, 1977 | Oneppus denticulatus | 3477 |
| Placorhynchus echinulatus Karling, 1947 | Placorhynchus echinulatus | 3477 |
| Placorhynchus octaculeatus Karling, 1931 | Placorhynchus octaculeatus | 3477 |
| Placorhynchus octaculeatus octaculeatus Karling, 1947 | Placorhynchus octaculeatus | 3477 |