| Serpula triquetra Linnaeus, 1767 |
| Serpula tubularia Montagu, 1803 |
| Serpula vermicularis Linnaeus, 1766 |
| Serpula vitrea Fabricius, 1780 |
| Serpula vossae Bastida-Zavala, 2012 |
| Serpulidae Rafinesque, 1815 |
| Simplaria P. Knight-Jones, 1984 |
| Simplaria pseudomilitaris (Thiriot-Quiévreux, 1965) |
| Sphaeropomatus Treadwell, 1934 |
| Sphaeropomatus miamiensis Treadwell, 1934 |
| Spiraserpula Regenhardt, 1961 |
| Spiraserpula caribensis Pillai & ten Hove, 1994 |
| Spirobranchus de Blainville, 1818 |
| Spirobranchus americanus (Day, 1973) |
| Spirobranchus augeneri ten Hove, 1970 |
| Spirobranchus dendropoma Mörch, 1863 |
| Spirobranchus gaymardi (de Quatrefages, 1866) |
| Spirobranchus giganteus (Pallas, 1766) |
| Spirobranchus giganteus var. giganteus (Pallas, 1766) |
| Spirobranchus incrassatus Kröyer, 1863 |