| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Tissierella | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Tindallia texcoconensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Tindallia magadiensis T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Tindallia californiensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Tindallia | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Timonella senegalensis T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Timonella | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Tichowtungia aerotolerans T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Tichowtungia | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Tichowtungiaceae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Tichowtungiales | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Tichowtungiia | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Tibeticola sediminis T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Tibeticola | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Tianweitania sediminis T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Tianweitania | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Thorsellia kenyensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Thorsellia kandunguensis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Thorsellia anophelis T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Thorsellia | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Thiovirga sulfuroxydans T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Thiovirga | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Thiothrix unzii | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Thiothrix nivea T | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Thiothrix lacustris | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Thiothrix fructosivorans | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Thiothrix flexilis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Thiothrix eikelboomii | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Thiothrix disciformis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Thiothrix defluvii | Unknown | Valid (ICNP) | Excubia bot about 5 years ago |