| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Trophon shackletoni | 0 | 1 | 0 |
| Trophon shackletoni paucilamellatus | 0 | 1 | 0 |
| Fuegotrophon Powell 1951 | 0 | 1 | 0 |
| Trophon veronicae | 0 | 1 | 0 |
| Tropidomarga Powell 1951 | 1 | 1 | 0 |
| Tropidomarga Powell 1951 | 0 | 1 | 0 |
| Tropidomarga biangulata Powell 1951 | 0 | 1 | 0 |
| Trypanosyllis Claparède 1864 | 1 | 0 | 0 |
| Trypanosyllis bidentata Hartman 1967 | 0 | 1 | 0 |
| Tucetona Iredale 1939 | 1 | 0 | 0 |
| Tucetona laticostata (Quoy & Gaimard 1835) | 0 | 1 | 0 |
| Turritellopsis | 1 | 0 | 0 |
| Turritellopsis latior | 0 | 1 | 0 |
| Typhlodaphne Powell 1951 | 2 | 1 | 0 |
| Typhlodaphne Powell 1951 | 0 | 1 | 0 |
