| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Rivicola pingtungensis T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rivicola | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rivibacter subsaxonicus T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rivibacter | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Risungbinella pyongyangensis T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Risungbinella massiliensis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Risungbinella | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rikenella microfusus T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rikenella | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Riemerella columbipharyngis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Riemerella columbina | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Riemerella anatipestifer | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Riemerella | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rickettsia typhi | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rickettsia tamurae subsp. tamurae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rickettsia tamurae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rickettsia tamurae subsp. buchneri | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rickettsia slovaca | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rickettsia sibirica | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rickettsia rickettsii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rickettsia rhipicephali | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rickettsia prowazekii T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rickettsia peacockii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rickettsia parkeri | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rickettsia montanensis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rickettsia monacensis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rickettsia massiliae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rickettsia japonica | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rickettsia hoogstraalii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Rickettsia honei | Unknown | Valid (ICNP) | Excubia bot over 4 years ago |