| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Nocardia coeliaca | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia cerradoensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia cavernae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia casuarinae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia carnea | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia camponoti | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia callitridis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia caishijiensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia brevicatena | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia brasiliensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia bovistercoris | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia blacklockiae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia bhagyanarayanae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia beijingensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia barduliensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia aurea | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia aurantiaca | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia aurantia | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia asteroides T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia asiatica | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia arthritidis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia artemisiae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia arizonensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia araoensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia aobensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia anaemiae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia amikacinitolerans | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia amamiensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia altamirensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Nocardia alba | Unknown | Valid (ICNP) | Excubia bot about 5 years ago |