| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Mesoterricola sediminis | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Mesorhizobium liriopis | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Mesopusillimonas | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Mesopusillimonas faecipullorum T | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Mediterraneibacter gnavus | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Marnyiella | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Marnyiella aurantia T | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Marixanthotalea | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Marixanthotalea marina T | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Marivirga aurantiaca | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Maritimibacter fusiformis | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Marinomonas transparens | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Marinomonas sargassi | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Marinomonas maritima | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Marinobacter iranensis | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Marinitoga aeolica | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Mariniradius sediminis | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Marinihelvus | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Marinihelvus fidelis T | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Marinicella marina | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Marinicella gelatinilytica | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Mariluticola | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Mariluticola halotolerans T | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Mannheimia cairinae | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Mangrovimonas aestuarii | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Magnetospirillum sulfuroxidans | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Lysinibacillus irui | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Luteimonas suaedae | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Limosilactobacillus kribbianus | Unknown | Valid (ICNP) | Excubia bot over 2 years ago | |
| Limosilactobacillus caecicola | Unknown | Valid (ICNP) | Excubia bot over 2 years ago |