| Species | Name Used |
|---|---|
| Tachyrhynchus reticulatus (Mighels & Adams, 1842) | Tachyrhynchus reticulatus (p. ) |
| Thelepus cincinnatus (Fabricius, 1780) | Thelepus cincinnatus (p. ) |
| Thyasira gouldii (Philippi, 1845) | Thyasira gouldii (p. ) |
| Thyonidium pellucidum (Fleming) | Thyonidium pellucidum (p. ) |
| Tubularia regalis Boeck, 1860 | Tubularia regalis (p. ) |
| Velutina undata (Brown, 1839) | Velutina undata (p. ) |
| Velutina velutina (Müller, 1776) | Velutina velutina (p. ) |
| Yoldia hyperborea (Gould, 1841) | Yoldia hyperborea (p. ) |