| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Clostridium papyrosolvens | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium oxalicum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium oroticum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium orbiscindens | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium neopropionicum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium muellerianum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium mobile | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium mayombei | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium maximum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium mangenotii | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium lortetii | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium lituseburense | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium litorale | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium limosum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium lentum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium lentoputrescens | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium lentocellum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium lavalense | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium laramiense | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium laramie | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium lactatifermentans | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium kogasensis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium josui | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium jejuense | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium irregularis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium irregulare | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium intestinalis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium indolis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium hydroxybenzoicum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium hungatei | Unknown | Valid (ICNP) | Excubia bot over 1 year ago |