| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Turritella Lamarck 1799 | 1 | 0 | 0 |
| Turritella alba H. Adams 1872 | 0 | 0 | 1 |
| Turritellidae | 1 | 0 | 0 |
| Tylosurus (needlefish) | 1 | 0 | 0 |
| Tylosurus crocodilus (Péron & Lesueur 1821) (Hound Needlefish) | 0 | 0 | 1 |
| Tylotiella | 1 | 0 | 0 |
| Clavus pica (Reeve 1843) | 0 | 0 | 1 |
| Typhlopidae Merrem 1820 (blind snakes) | 1 | 0 | 0 |
| Ucla (yellowlip triplefin) | 1 | 0 | 0 |
| Ucla xenogrammus Holleman 1993 (Largemouth Triplefin) | 0 | 0 | 1 |
| Urena (urena) | 1 | 0 | 0 |
| Urena lobata L. (Caesarweed) | 0 | 0 | 1 |
| Urodacus | 1 | 0 | 0 |
| Urodacus novaehollandiae Peters 1861 | 0 | 0 | 1 |
| Urophorus | 1 | 0 | 0 |
