| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Xenorhabdus magdalenensis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xenorhabdus mauleonii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xenorhabdus miraniensis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xenorhabdus nematophila T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xenorhabdus nematophila subsp. beddingii | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Xenorhabdus nematophila subsp. bovienii | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Xenorhabdus nematophila subsp. nematophila | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Xenorhabdus nematophila subsp. poinarii | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Xenorhabdus nematophilus | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Xenorhabdus nematophilus subsp. beddingii | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Xenorhabdus nematophilus subsp. bovenii | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Xenorhabdus nematophilus subsp. bovienii | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Xenorhabdus nematophilus subsp. nematophilus | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Xenorhabdus nematophilus subsp. poinarii | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Xenorhabdus poinarii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xenorhabdus romanii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xenorhabdus stockiae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xenorhabdus szentirmaii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xenorhabdus thuongxuanensis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xenorhabdus vietnamensis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Xenorhabdus yunnanensis | Unknown | Valid (ICNP) | Excubia bot about 2 years ago | |
| Xiamenia | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Xiamenia xianingshaonis T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Xiangella | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Xiangella phaseoli T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Xiashengella | Unknown | Valid (ICNP) | Excubia bot almost 2 years ago | |
| Xiashengella succiniciproducens T | Unknown | Valid (ICNP) | Excubia bot almost 2 years ago | |
| Xiheibacterium | ||||
| Xiheibacterium aquaticum | ||||
| Xiheibacterium phototrophicum Ts |