| Scientific Name | TSN | Taxon Author | Common Name | Name Source | Usage | Reason (ITIS) | Taxon Rank |
|---|
| Acoetidae | 65023 | Kinberg, 1856 | | ITIS | valid | | Family |
| Alciopidae | 65399 | Ehlers, 1864 | | ITIS | valid | | Family |
| Antonbruunidae | 68384 | Fauchald, 1977 | | ITIS | invalid | junior synonym of Syllidae | Family |
| Aphroditidae | 64359 | Malmgren, 1867 | | ITIS | valid | | Family |
| Aphroditiformia | 999015532 | | | | public | mtsn | Infraorder |
| Aphroditoidea | 999018932 | | | | public | mtsn | Superfamily |
| Calamyzidae | 68388 | Hartmann-Schroeder, 1971 | | ITIS | invalid | junior synonym of Syllidae | Family |
| Chrysopetalidae | 65148 | Ehlers, 1864 | | ITIS | valid | | Family |
| Eulepethidae | 65055 | Chamberlin, 1919 | | ITIS | valid | | Family |
| Glyceridae | 66101 | Grube, 1850 | | ITIS | valid | | Family |
| Glyceriformia | 999015767 | | | | public | mtsn | Infraorder |
| Goniadidae | 66126 | Kinberg, 1866 | | ITIS | valid | | Family |
| Hesionidae | 65467 | Grube, 1850 | | ITIS | valid | | Family |
| Ichthyotomidae | 66564 | Eisig, 1906 | | ITIS | valid | | Family |
| Iospilidae | 65442 | Bergstroem, 1914 | | ITIS | valid | | Family |
| Lacydoniidae | 65436 | Bergstroem, 1914 | | ITIS | valid | | Family |
| Lopadorhynchidae | 65420 | Claparede, 1868 | | ITIS | valid | | Family |
| Myzostomidae | 66567 | Benham, 1896 | | ITIS | valid | | Family |
| Nautiliniellidae | 555680 | Miura and Laubier, 1990 | | ITIS | valid | | Family |
| Nephtyidae | 66010 | Grube, 1850 | | ITIS | valid | | Family |
| Nereidae | 660241 | Johnston, 1845 | | ITIS | invalid | unavailable, literature misspelling of Nereididae | Family |
| Nereididae | 65870 | Johnston, 1865 | | ITIS | valid | | Family |
| Nereidiformia | 999015619 | | | | public | mtsn | Infraorder |
| Palmyridae | 65163 | Kinberg, 1858 | | ITIS | invalid | junior synonym of Aphroditidae | Family |
| Paralacydoniidae | 555678 | Pettibone, 1963 | | ITIS | valid | | Family |
| Pareulepidae | 65056 | | | ITIS | invalid | junior synonym of Eulepethidae | Family |
| Pholoidae | 65050 | Kinberg, 1858 | | ITIS | valid | | Family |
| Phyllodocidae | 65228 | Oersted, 1843 | | ITIS | valid | | Family |
| Pilargidae | 65540 | Saint-Joseph, 1899 | | ITIS | valid | | Family |
| Pisionidae | 65141 | Southern, 1914 | | ITIS | valid | | Family |
| Polynoidae | 64397 | Malmgren, 1867 | | ITIS | valid | | Family |
| Polyodontidae | 65021 | Buchanan, 1894 | | ITIS | invalid | junior synonym of Acoetidae | Family |
| Polyodontidae | 65022 | Buchanan, 1894 | | ITIS | invalid | unavailable, database artifact of Acoetidae | Family |
| Pontodoridae | 65447 | Bergstroem, 1914 | | ITIS | valid | | Family |
| Sigalionidae | 65072 | Malmgren, 1867 | | ITIS | valid | | Family |
| Sphaerodoridae | 66064 | Malmgren, 1867 | | ITIS | valid | | Family |
| Syllidae | 65587 | Grube, 1850 | | ITIS | valid | | Family |
| Tomopteridae | 65459 | Johnston, 1865 | | ITIS | valid | | Family |
| Typhloscolecidae | 65448 | Uljanin, 1878 | | ITIS | valid | | Family |
