| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Yersinia enterocolitica subsp. palearctica | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Yersinia enterocolitica | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Yersinia enterocolitica subsp. enterocolitica | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Yersinia canariae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Yersinia bercovieri | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Yersinia artesiana | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Yersinia alsatica | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Yersinia aleksiciae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Yersinia aldovae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Yersinia | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Yeosuana marina | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Yeosuana aromativorans T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Yeosuana | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Yaniella soli | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Yaniella halotolerans T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Yaniella flava | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Yaniella | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Yaniellaceae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylophilus ampelinus T | ||||
| Xylophilus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylella taiwanensis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylella fastidiosa subsp. multiplex | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylella fastidiosa T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylella fastidiosa subsp. fastidiosa | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylella | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylanivirga thermophila T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylanivirga | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylanivirgaceae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylanimonas ulmi | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xylanimonas pachnodae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago |