| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Zuelzera stenostrepta T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zophobihabitans | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zophobihabitans entericus T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zooshikella harenae | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zongyanglinia marina | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zongyangia | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zongyangia hominis T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zobellia galactanovorans | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zobellia barbeyronii | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Zobellella iuensis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| 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 | |
| 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 |