| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Zhaonellaceae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Zeaxanthinibacter enoshimensis T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Zeaxanthinibacter aestuarii | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Zeaxanthinibacter | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Zavarzinia compransoris T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Zavarzinia aquatilis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Zavarzinia | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Zavarziniaceae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Zavarzinella formosa T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Zavarzinella | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Youngimonas vesicularis T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Youngimonas | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Youngiibacter multivorans | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Youngiibacter fragilis T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Youngiibacter | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Youhaiella tibetensis T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Youhaiella | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Yoonia vestfoldensis T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Yoonia tamlensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Yoonia sediminilitoris | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Yoonia rosea | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Yoonia maritima | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Yoonia maricola | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Yoonia litorea | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Yoonia | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Yonghaparkia alkaliphila T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Yonghaparkia | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Yokenella regensburgei T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Yokenella | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Yinghuangia seranimata | Unknown | Valid (ICNP) | Excubia bot about 5 years ago |