| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Clostridium aciditolerans | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clostridium acidisoli | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clostridium acetobutylicum | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clostridium acetireducens | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clostridium aceticum | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clostridium | ||||
| Clostridioides mangenotii | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clostridioides difficile T | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clostridioides | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clostridiisalibacter paucivorans T | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clostridiisalibacter | ||||
| Cloacibacterium rupense | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Cloacibacterium normanense T | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Cloacibacterium haliotis | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Cloacibacterium caeni | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Cloacibacterium | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Cloacibacillus porcorum | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Cloacibacillus evryensis T | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Cloacibacillus | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clavibacter tessellarius | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clavibacter sepedonicus | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clavibacter nebraskensis | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clavibacter michiganensis subsp. phaseoli | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clavibacter michiganensis subsp. michiganensis | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clavibacter michiganensis subsp. chilensis | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clavibacter michiganensis T | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clavibacter michiganensis subsp. californiensis | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clavibacter insidiosus | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clavibacter capsici | Unknown | Valid (ICNP) | Excubia bot about 4 years ago | |
| Clavibacter | Unknown | Valid (ICNP) | Excubia bot about 4 years ago |