| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Zimmermannella helvola T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zimmermannella faecalis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zimmermannella bifida | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zhihengliuella aestuarii | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zhenhengia | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zhenhengia yiwuensis T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zhangella | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zhangella mobilis T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zeimonas | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zeimonas sediminis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zeimonas arvi T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zavarzinia marina | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zarconia | ||||
| Zarconia navalis T | ||||
| Zafaria | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zafaria cholistanensis T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Yuhushiella | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Yuhushiella deserti T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Youxingia | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Youxingia wuxianensis T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Yoonia ponticola | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Yoonia acticola | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Yersinia rochesterensis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Yersinia pseudotuberculosis subsp. pseudotuberculosis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Yersinia pseudotuberculosis subsp. pestis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Yersinia philomiragia | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Yersinia occitanica | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Yersinia kristensenii subsp. rochesterensis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Yaniella fodinae | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Yania | Unknown | Valid (ICNP) | Excubia bot over 3 years ago |