| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Zimmermannella bifida | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Zhihengliuella aestuarii | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Zhenhengia | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Zhenhengia yiwuensis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Zhangella | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Zhangella mobilis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Zeimonas | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Zeimonas sediminis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Zeimonas arvi | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Zavarzinia marina | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Zafaria | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Zafaria cholistanensis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Yuhushiella | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Yuhushiella deserti | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Youxingia | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Youxingia wuxianensis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Yoonia ponticola | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Yoonia acticola | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Yersinia rochesterensis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Yersinia pseudotuberculosis subsp. pseudotuberculosis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Yersinia pseudotuberculosis subsp. pestis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Yersinia philomiragia | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Yersinia occitanica | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Yersinia kristensenii subsp. rochesterensis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Yaniella fodinae | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Yania | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Yania halotolerans | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Yania flava | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Yangia | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Yangia pacifica | Unknown | Valid (ICNP) | Excubia bot over 1 year ago |