| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Mangrovibacter | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Mammaliicoccus vitulinus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Mammaliicoccus stepanovicii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Mammaliicoccus sciuri T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Mammaliicoccus lentus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Mammaliicoccus fleurettii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Mammaliicoccus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Mameliella alba T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Mameliella | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Malonomonas rubra T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Malonomonas | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Maliponia aquimaris T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Maliponia | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Malikia spinosa | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Malikia granosa T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Malikia | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Maledivibacter halophilus T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Maledivibacter | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Maioricimonas rarisocia T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Maioricimonas | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Mahella australiensis T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Mahella | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Magnetovibrio blakemorei T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Magnetovibrio | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Magnetospirillum moscoviense | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Magnetospirillum molischianum | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Magnetospirillum marisnigri | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Magnetospirillum magnetotacticum | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Magnetospirillum kuznetsovii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Magnetospirillum gryphiswaldense T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago |