| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Melissococcus plutonius T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Melissococcus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Melioribacter roseus T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Melioribacter | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Melioribacteraceae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Melghirimyces thermohalophilus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Melghirimyces profundicolus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Melghirimyces algeriensis T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Melghirimyces | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Melghiribacillus thermohalophilus T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Melghiribacillus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Melaminivora jejuensis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Melaminivora alkalimesophila T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Melaminivora | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Meiothermus taiwanensis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Meiothermus silvanus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Meiothermus rufus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Meiothermus ruber T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Meiothermus luteus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Meiothermus hypogaeus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Meiothermus granaticius | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Meiothermus cerbereus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Meiothermus cateniformans | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Meiothermus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Meinhardsimonia xiamenensis T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Meinhardsimonia | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Megasphaera vaginalis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Megasphaera sueciensis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Megasphaera stantonii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Megasphaera paucivorans | Unknown | Valid (ICNP) | Excubia bot over 4 years ago |