| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Clostridium ammoniilyticum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium aminovalericum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium alkalicellum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium alkalicellulosi | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium algidixylanolyticum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium aldrichii | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium aldenense | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium aerotolerans | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium acidurici | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium acidiurici | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium absonum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clevelandina | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clevelandina reticulitermitidis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clavibacter xyli | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clavibacter xyli subsp. xyli | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clavibacter xyli subsp. cynodontis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clavibacter tritici | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clavibacter toxicus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clavibacter rathayi | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clavibacter phaseoli | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clavibacter michiganensis subsp. tessellarius | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clavibacter michiganensis subsp. sepedonicus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clavibacter michiganensis subsp. sepedonicum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clavibacter michiganensis subsp. nebraskensis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clavibacter michiganensis subsp. nebraskense | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clavibacter michiganensis subsp. insidiosus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clavibacter michiganensis subsp. insidiosum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clavibacter michiganensis subsp. capsici | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clavibacter michiganense | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clavibacter michiganense subsp. tessellarius | Unknown | Valid (ICNP) | Excubia bot over 1 year ago |