| Syllis truncata Haswell, 1920 |
| Syllis variegata Grube, 1860 |
| Syllis vittata (Grube, 1840) |
| Syllis vivipara (Krohn, 1869) |
| Syllis zebra Grube, 1860 |
| Synmerosyllis San Martín, López & Aguado, 2009 |
| Synmerosyllis aciculata (San Martín, 1990) |
| Synsyllis Verrill, 1900 |
| Synsyllis longigularis (Verrill, 1900) |
| Trypanosyllis Claparède, 1864 |
| Trypanosyllis adamanteus Treadwell, 1914 |
| Trypanosyllis coeliaca Claparède, 1868 |
| Trypanosyllis columbrensis San Martín, 1984 |
| Trypanosyllis complanata (Treadwell, 1901) |
| Trypanosyllis gemmipara Johnson, 1901 |
| Trypanosyllis inglei Perkins, 1981 |
| Trypanosyllis parvidentata Perkins, 1981 |
| Trypanosyllis prampramensis Augener, 1918 |
| Trypanosyllis savagei Perkins, 1981 |
| Trypanosyllis vittigera Ehlers, 1887 |