| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Orbus sasakiae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Orbus hercynius T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Orbus | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Opitutus terrae T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Opitutus | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olsenella umbonata | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olsenella uli T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olsenella profusa | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olsenella faecalis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olsenella | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olleya namhaensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olleya marilimosa T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olleya aquimaris | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olleya algicola | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olleya | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olivibacter terrae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olivibacter soli | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olivibacter sitiensis T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olivibacter oleidegradans | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olivibacter jilunii | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olivibacter ginsenosidimutans | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olivibacter ginsengisoli | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olivibacter domesticus | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olivibacter composti | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Olivibacter | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oligosphaera ethanolica T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oligosphaera | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oligosphaeraceae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oligosphaerales | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oligosphaeria | Unknown | Valid (ICNP) | Excubia bot about 5 years ago |