| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Microbacterium albipurpureum | ||||
| Methylorubrum subtropicum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Methyloraptor | ||||
| Methyloraptor flagellatus T | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Methylobacterium litchii | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Methylobacterium guangdongense | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Methanospirillum purgamenti | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Methanoeremita | ||||
| Methanoeremita antiquus T | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Methanococcoides cohabitans | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Methanochimaera | ||||
| Methanochimaera problematica T | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Methanobacterium aridiramus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Metabacillus sediminis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Metabacillus rhizosphaerae | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Mesocryomonas | ||||
| Mesocryomonas glaciei T | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Mediterraneibacter flintii | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Marivivens marinum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Marivirga salinarum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Marinobacter apostichopi | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Mariniflexile litorale | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Marinicellulosiphila | ||||
| Marinicellulosiphila megalodicopiae T | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Manganibacter | ||||
| Manganibacter manganicus T | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Lutimaribacter degradans | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Luteimonas salinilitoris | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Limosilactobacillus allomucosae | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Limibacterium |