| Label | Id | |
|---|---|---|
| Olivoidea | 1719433 | |
| Onchidina | 1904334 | |
| Oncomerella | 433135 | |
| Oningis | 243392 | |
| Opilo | 433136 | |
| Orthocis | 433137 | |
| Orthosia | 43336 | |
| Oschatzia | 344336 | |
| Osphya | 433138 | |
| Ototretinae | 433517 | |
| Oxyruncus | 114330 | |
| Pachyloides | 43302 | |
| Pachyramphus | 114332 | |
| Parabrotulidae | 1522433 | |
| Paracurvitermes | 1354331 |