| Nominal Species (n = 12) | Present allocation (n = 12) | Ref. |
|---|---|---|
| Arachnactis albida Sars, 1846 | Arachnactis albida | 19 |
| Cerianthus borealis Verrill, 1873 | Pachycerianthus borealis | 3477 |
| Isodactylactis borealis Widersten, 1998 | Isodactylactis borealis | 1663 |
| Arachnactis brachiolata Agassiz, 1863 | Synarachnactis brachiolata | 19 |
| Ceriantheomorphe brasiliensis Carlgen, 1931 | Ceriantheomorphe brasiliensis | 1663 |
| Pachycerianthus delwynae Carter, 1995 | Pachycerianthus delwynae | 3477 |
| Pachycerianthus fimbriatus Mcmurrich, 1910 | Pachycerianthus fimbriatus | 19 |
| Pachycerianthus insignis Carlgren, 1951 | Pachycerianthus insignis | 19 |
| Cerianthus lloydii Gosse, 1859 | Cerianthus lloydii | 19 |
| Pachycerianthus multiplicatus Carlgren, 1846 | Pachycerianthus multiplicatus | 19 |
| Pachycerianthus schlenzae Stampar, Morandini & Silveira, 2014 | Pachycerianthus schlenzae | 3477 |
| Cerianthus vogti Danielssen, 1890 | Cerianthus vogti | 3477 |