| Family | Genus | Species |
|---|---|---|
| Acanthodrilidae | 18 | 115 |
| Aeolosomatidae | 2 | 18 |
| Ailoscolecidae | 1 | 1 |
| Almidae | 6 | 65 |
| Criodrilidae | 1 | 2 |
| Eudrilidae | 5 | 10 |
| Glossoscolecidae | 14 | 163 |
| Hormogastridae | 7 | 62 |
| Kazimierzidae | 1 | 16 |
| Kynotidae | 1 | 13 |
| Lumbricidae | 45 | 890 |
| Megascolecidae | 43 | 1934 |
| Microchaetidae | 4 | 15 |
| Ocnerodrilidae | 4 | 30 |
| Octochaetidae | 3 | 6 |
| Rhinodrilidae | 0 | 1 |