| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Spirosoma rhododendri | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirosoma metallicus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirosoma daeguensis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirochaeta zuelzerae | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirochaeta stenostreptum | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirochaeta stenostrepta | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirochaeta sphaeroplastigenens | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirochaeta smaragdinae | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirochaeta sinaica | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirochaeta plicatilis T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirochaeta perfilievii | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirochaeta odontotermitis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirochaeta litoralis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirochaeta coccoides | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirochaeta caldarium | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirochaeta caldaria | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirochaeta bajacaliforniensis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirochaeta aurantia subsp. stricta | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirochaeta americana | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spirochaeta alkalica | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spiribacter aquaticus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spiractinospora | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Spiractinospora alimapuensis T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Sphingosinicella vermicomposti | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Sphingosinicella flava | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Sphingorhabdus pacificus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Sphingopyxis wooponensis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Sphingopyxis terrae subsp. ummariensis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Sphingopyxis terrae subsp. terrae | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Sphingopyxis rigui | Unknown | Valid (ICNP) | Excubia bot over 3 years ago |