| Species | RefIntense Num | Refseq Num | Source |
|---|---|---|---|
| Moellerella wisconsensis | 1 | 9 | MGYG |
| Monoglobus pectinilyticus | 1 | 1 | MGYG |
| Moorella thermoacetica | 1 | 16 | HMP |
| Moraxella catarrhalis | 1 | 209 | HMP |
| Morganella morganii | 3 | 196 | MGYG |
| Moritella sp. PE36 | 1 | 1 | HMP |
| Murdochiella massiliensis | 1 | 2 | MGYG |
| Murdochiella vaginalis | 1 | 2 | MGYG |
| Muribaculum intestinale | 1 | 11 | MGYG |
| Murimonas intestini | 1 | 4 | MGYG |