| Scientific Name | TSN | Taxon Author | Common Name | Name Source | Usage | Reason (ITIS) | Taxon Rank |
|---|
| Amphinomidae | 65164 | Savigny in Lamarck, 1818 | | ITIS | valid | | Family |
| Arabellidae | 66422 | Hartman, 1944 | | ITIS | invalid | junior synonym of Oenonidae | Family |
| Dinophilidae | 68406 | Remane, 1932 | | ITIS | invalid | junior synonym of Dorvilleidae | Family |
| Diurodrilidae | 555679 | Kristensen and Niilonen, 1982 | | ITIS | valid | | Family |
| Dorvilleidae | 66478 | Chamberlin, 1919 | | ITIS | valid | | Family |
| Eunicidae | 66260 | Berthold, 1827 | | ITIS | valid | | Family |
| Euphrosinidae | 65205 | Williams, 1851 | | ITIS | valid | | Family |
| Hartmaniellidae | 68380 | Imajima, 1977 | | ITIS | valid | | Family |
| Histriobdellidae | 66558 | Vaillant, 1890 | | ITIS | valid | | Family |
| Iphitimidae | 66417 | Fauchald, 1970 | | ITIS | invalid | junior synonym of Dorvilleidae | Family |
| Lumbrineridae | 66335 | Schmarda, 1861 | | ITIS | valid | | Family |
| Lysaretidae | 66468 | Kinberg, 1865 | | ITIS | invalid | junior synonym of Lumbrineridae | Family |
| Oenonidae | 555681 | Kinberg, 1865 | | ITIS | valid | | Family |
| Onuphidae | 66157 | Kinberg, 1865 | | ITIS | valid | | Family |
