| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Oleidesulfovibrio | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Oleibacter marinus T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Oleibacter | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Oleiagrimonas soli T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Oleiagrimonas citrea | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Oleiagrimonas | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Okibacterium fritillariae T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Okibacterium endophyticum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Okibacterium | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Ohtaekwangia kribbensis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Ohtaekwangia koreensis T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Ohtaekwangia | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Oharaeibacter diazotrophicus T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Oharaeibacter | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Oerskovia turbata T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Oerskovia paurometabola | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Oerskovia jenensis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Oerskovia enterophila | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Oerskovia | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Oenococcus oeni T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Oenococcus kitaharae | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Oenococcus alcoholitolerans | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Oenococcus | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Odoribacter splanchnicus T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Odoribacter laneus | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Odoribacter denticanis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Odoribacter | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Octadecabacter temperatus | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Octadecabacter ponticola | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Octadecabacter ascidiaceicola | Unknown | Valid (ICNP) | Excubia bot about 3 years ago |