| Scolelepis (Scolelepis) acuta (Treadwell, 1914) |
| Scolelepis (Scolelepis) agilis (Verrill, 1873) |
| Scolelepis (Scolelepis) squamata O.F. Müller, 1806 |
| Scolelepis (Scolelepis) texana Foster, 1971 |
| Scolelepis agilis (Verrill, 1873) |
| Scolelepis arenicola (Hartmann-Schröder, 1959) |
| Scolelepis bonnieri (Mesnil, 1896) |
| Scolelepis indica Fauvel, 1928 |
| Scolelepis indicus Fauvel, 1928 |
| Scolelepis squamata (O.F. Müller, 1806) |
| Scolelepis viridis Verrill, 1873 |
| Spio Fabricius, 1785 |
| Spio (Microspio) Mesnil, 1869 |
| Spio (Microspio) pigmentada (Reish, 1959) |
| Spio (Spio) Fabricius, 1785 |
| Spio (Spio) pettiboneae Foster, 1971 |
| Spio acuta Treadwell, 1914 |
| Spio blakei Maciolek, 1990 |
| Spio bombix Claparède, 1870 |
| Spio bombyx Claparède, 1870 |