| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Xylanimonas allomyrinae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylanimonas cellulosilytica T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylanimonas pachnodae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylanimonas protaetiae | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Xylanimonas ulmi | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylanivirga | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylanivirga thermophila T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylanivirgaceae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylella | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylella fastidiosa T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylella fastidiosa subsp. fastidiosa | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylella fastidiosa subsp. multiplex | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylella taiwanensis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylocopilactobacillus | Unknown | Valid (ICNP) | Excubia bot almost 2 years ago | |
| Xylocopilactobacillus apicola | Unknown | Valid (ICNP) | Excubia bot almost 2 years ago | |
| Xylocopilactobacillus apis T | Unknown | Valid (ICNP) | Excubia bot almost 2 years ago | |
| Xylophilus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylophilus ampelinus T | ||||
| Yabuuchia | ||||
| Yabuuchia boeckii T | Unknown | Valid (ICNP) | Excubia bot 8 months ago | |
| Yabuuchia cavernae | Unknown | Valid (ICNP) | Excubia bot 8 months ago | |
| Yabuuchia colocasiae | Unknown | Valid (ICNP) | Excubia bot 8 months ago | |
| Yanghanlia | ||||
| Yanghanlia caeni T | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Yangia | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Yangia mangrovi | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Yangia pacifica T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Yania | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Yania flava | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Yania halotolerans T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago |