| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Risungbinella | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rikenella microfusus T | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rikenella | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Riemerella columbipharyngis | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Riemerella columbina | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Riemerella anatipestifer | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Riemerella | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia typhi | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia tamurae subsp. tamurae | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia tamurae | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia tamurae subsp. buchneri | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia slovaca | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia sibirica | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia rickettsii | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia rhipicephali | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia prowazekii T | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia peacockii | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia parkeri | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia montanensis | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia monacensis | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia massiliae | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia japonica | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia hoogstraalii | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia honei | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia heilongjiangensis | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia gravesii | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia felis | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia conorii subsp. raoultii | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia conorii subsp. israelensis | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Rickettsia conorii subsp. indica | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago |