| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Meganema | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Meganema perideroedes T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Megamonas hypermegas | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Megalodesulfovibrio gigas T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Mediterraneibacter hominis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Mediannikoviicoccus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Mediannikoviicoccus vaginalis T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Massilia soli | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Massilia polaris | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Massilia forsythiae | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Massilia eburnea | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Massilia cavernae | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Massilia antarctica | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Marivivens geojensis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Maritimibacter dapengensis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Maritalea mediterranea | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Maripseudobacter | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Maripseudobacter aurantiacus T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Marinomonas vulgaris | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Marinomonas vaga | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Marinomonas lutimaris | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Marinomonas basaltis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Marinomonas aquamarina | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Marinococcus hispanicus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Marinococcus albus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Marinobacterium ramblicola | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Marinobacterium georgiense T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Marinobacter orientalis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Marinobacter mangrovi | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Marinobacter hydrocarbonoclasticus T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago |