| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Xenorhabdus japonicus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Xaviernesmea | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Xaviernesmea rhizosphaerae | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Xaviernesmea oryzae | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Xanthomonas youngii | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Xanthomonas maltophilia | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Xanthomonas hydrangeae | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Xanthomonas gardneri | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Xanthomonas fuscans | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Xanthomonas fuscans subsp. fuscans | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Xanthomonas fuscans subsp. aurantifolii | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Xanthomonas bonasiae | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Xanthomonas ampelina | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Xanthobacter dioxanivorans | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Wolinella recta | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Wolinella curva | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Wolbachia | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Wolbachia pipientis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Wolbachia persica | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Wolbachia melophagi | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Winogradskyella marina | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Winogradskyella luteola | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Williamsia soli | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Williamsia aurantiacus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Wielerella | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Wielerella bovis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Wenjunlia | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Wenjunlia vitaminophila | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Wenjunlia tyrosinilytica | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Weizmannia faecalis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago |