| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Nitrospirillum | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosospira tenuis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosospira multiformis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosospira lacus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosospira | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrososphaera viennensis T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrososphaera | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrososphaeraceae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrososphaerales | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosopumilus ureiphilus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosopumilus piranensis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosopumilus oxyclinae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosopumilus maritimus T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosopumilus cobalaminigenes | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosopumilus adriaticus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosopumilus | ||||
| Nitrosomonas ureae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosomonas stercoris | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosomonas oligotropha | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosomonas nitrosa | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosomonas marina | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosomonas halophila | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosomonas eutropha | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosomonas europaea T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosomonas communis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosomonas aestuarii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosomonas | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosomonadaceae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosococcus oceani | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Nitrosococcus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago |