| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Olsenella scatoligenes | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Oligotropha | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Oligotropha carboxidovorans T | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Oerskovia xanthineolytica | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Octadecabacter jejudonensis | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Octadecabacter dasysiphoniae | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Octadecabacter algicola | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum tritici | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum thiophenivorans | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum rhizosphaerae | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum pseudogrignonense | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum pseudintermedium | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum pituitosum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum pecoris | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum oryzae | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum lupini | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum intermedium | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum haematophilum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum grignonense | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum gallinifaecis | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum endophyticum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum daejeonense | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum cytisi | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum ciceri | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Ochrobactrum anthropi T | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Oceanospirillum pusillum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Oceanospirillum pelagicum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Oceanospirillum minutulum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Oceanospirillum maris subsp. williamsae | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Oceanospirillum maris subsp. maris | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago |