| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Mesocryomonas | ||||
| Mesocryomonas glaciei T | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Mediterraneibacter flintii | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Marivivens marinum | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Marivirga salinarum | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Marinobacter apostichopi | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Mariniflexile litorale | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Marinicellulosiphila | ||||
| Marinicellulosiphila megalodicopiae T | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Manganibacter | ||||
| Manganibacter manganicus T | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Lutimaribacter degradans | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Luteimonas salinilitoris | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Limosilactobacillus allomucosae | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Limibacterium | ||||
| Limibacterium fermenti T | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Levilactobacillus lettrarii | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Leptospira milleri | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Leptospira mgodei | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Leptospira iowaensis | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Leptospira gorisiae | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Leptospira cinconiae | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Leptobacterium meishanense | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Lentilactobacillus terminaliae | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Lelliottia wanjuensis | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Lapidilactobacillus salsurivasis | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Lactobacillus amylovorus subsp. animalium | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Lacticaseibacillus jixiensis | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Lacrimispora sinapis | Unknown | Valid (ICNP) | Excubia bot about 1 year ago | |
| Kumtagia |