| Strongylus tubaeformis Zeder, 1800 |
| Strongylus tubifex Nitzsch, 1819 |
| Strongylus uncinatus Lundahl, 1848 |
| Strongylus vasorum Baillet, 1866 |
| Strongylus vulgaris (Looss, 1900) Railliet & Henry, 1909 |
| Tridentoinfundibulum Tshoijo, 1958 |
| Tridentoinfundibulum gobi Tshoijo, 1958 |
| Triodontophorus Looss, 1902 |
| Triodontophorus serratus (Looss, 1900) Looss, 1902 |
| Triodontophorus tenuicollis Boulenger, 1916 |
| Triodontus Looss, 1900 |
| Triodontus serratus Looss, 1900 |
| Tziminema Güiris-Andrade, Osorio-Sarabia & García-Prieto, 2018 |
| Tziminema unachi Güiris-Andrade, Osorio-Sarabia & García-Prieto, 2018 |