| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Oceanithermus | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanispirochaeta sediminicola | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanispirochaeta litoralis T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanispirochaeta crateris | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanispirochaeta | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanisphaera sediminis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanisphaera psychrotolerans | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanisphaera profunda | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanisphaera ostreae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanisphaera marina | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanisphaera litoralis T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanisphaera donghaensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanisphaera avium | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanisphaera arctica | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanisphaera | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceaniserpentilla haliotis T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceaniserpentilla | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanirhabdus sediminicola T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanirhabdus | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceaniradius stylonematis T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceaniradius | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanipulchritudo coccoides T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanipulchritudo | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanimonas smirnovii | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanimonas marisflavi | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanimonas doudoroffii T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanimonas baumannii | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanimonas | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanihabitans sediminis T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Oceanihabitans | Unknown | Valid (ICNP) | Excubia bot about 5 years ago |