| Id. | Group | Links |
| 315 | Taxaceae | |
| 308 | Taxodiaceae | |
| 316 | Technetium | |
| 318 | Tellur | |
| 319 | Thallium | |
| 109 | Theaceae | |
| 81 | Theraphosidae | |
| 224 | Theridiidae | |
| 156 | Thymelaeaceae | |
| 321 | Tiliaceae | |
| 322 | Titanium | |
| 167 | Trachinidae | |
| 158 | Tribonemaceae | |
| 73 | Trichocomaceae | |
| 324 | Trombidiidae | |
| 325 | Tropaeolaceae | |
| 326 | Tungstenium | |
| 327 | Turneraceae | |
| 329 | Typhaceae | |