| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Tatlockia micdadei | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Tatlockia maceachernii | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Tannockella | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Tannockella kyphosi | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Tannerella forsythensis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Tamlicoccus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Tamlicoccus marinus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Tamlana haliotis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Tabrizicola thermarum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Tabrizicola soli | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Tabrizicola rongguiensis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Tabrizicola flagellatus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Tabrizicola blastica | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Szabonella | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Szabonella alba | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Syntrophospora | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Syntrophospora bryantii | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Syntrophobacterium | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Syntrophobacterium sulfatireducens | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Symbiotes | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Symbiotes lectularius | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Symbiotes lectularia | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Symbiopectobacterium | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Symbiopectobacterium purcellii | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Sutcliffiella rhizosphaerae | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Sutcliffiella deserti | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Suonthocola | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Suonthocola fibrivorans | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Sulfurospirillum diekertiae | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Sulfurococcus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago |