| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Mesobacterium pallidum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Mergibacter | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Mergibacter septicus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Merdimmobilis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Merdimmobilis hominis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Membranihabitans | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Membranihabitans marinus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Melittangium alboraceum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Melitea | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Melitea salexigens | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Melissococcus pluton | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Melisococcus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Melisococcus plutonius | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Melisococcus plutonis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Melaminivora suipulveris | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Meiothermus timidus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Meiothermus terrae | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Meiothermus roseus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Meiothermus chliarophilus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Megasphaera hominis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Megasphaera butyrica | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Meganema | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Meganema perideroedes | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Megamonas hypermegas | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Megalodesulfovibrio gigas | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Mediterraneibacter hominis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Mediannikoviicoccus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Mediannikoviicoccus vaginalis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Massilia soli | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Massilia polaris | Unknown | Valid (ICNP) | Excubia bot over 1 year ago |