| Species | RefIntense Num | Refseq Num | Source |
|---|---|---|---|
| Collinsella tanakaei | 1 | 11 | MGYG |
| Collinsella vaginalis | 1 | 1 | MGYG |
| Colwellia psychrerythraea | 1 | 3 | HMP |
| Comamonas kerstersii | 1 | 7 | MGYG |
| Comamonas testosteroni | 2 | 18 | HMP |
| Companilactobacillus farciminis | 1 | 6 | MGYG |
| Conexibacter woesei | 1 | 2 | HMP |
| Congregibacter litoralis | 1 | 1 | HMP |
| Coprobacillus cateniformis | 1 | 8 | MGYG |
| Coprobacter fastidiosus | 1 | 4 | MGYG |