| Family | Genus | Species |
|---|---|---|
| Ascidiidae | 4 | 40 |
| Cionidae | 2 | 16 |
| Clavelinidae | 2 | 26 |
| Corellidae | 3 | 12 |
| Diazonidae | 2 | 5 |
| Didemnidae | 6 | 159 |
| Euherdmaniidae | 1 | 1 |
| Hexacrobylidae | 1 | 1 |
| Molgulidae | 4 | 31 |
| Octacnemidae | 7 | 13 |
| Perophoridae | 2 | 19 |
| Polycitoridae | 7 | 58 |
| Polyclinidae | 4 | 80 |
| Pseudodistomidae | 1 | 4 |
| Pycnoclavellidae | 1 | 15 |
| Pyuridae | 7 | 80 |
| Styelidae | 17 | 305 |
| Synoicidae | 1 | 1 |