| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Clostridium lactatifermentans | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium kogasensis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium josui | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium jejuense | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium irregularis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium irregulare | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium intestinalis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium indolis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium hydroxybenzoicum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium hungatei | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium hominis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium histolyticum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium hiranonis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium hemolyticum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium hathewayi | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium hastiforme | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium halophilum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium halophilium | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium glycyrrhizinilyticum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium glycolicum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium ghonii | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium ghoni | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium gelidum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium formicoaceticum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium fervidus | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium fervidum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium facile | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium durum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium diolis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium difficile | Unknown | Valid (ICNP) | Excubia bot about 3 years ago |