| Ehlersia rosea subsp. magna Westheide, 1974 |
| Erinaceusyllis San Martín, 2005 |
| Erinaceusyllis belizensis (Russell, 1989) |
| Eurysyllis Ehlers, 1864 |
| Eurysyllis tuberculata Ehlers, 1864 |
| Eusyllis Malmgren, 1867 |
| Eusyllis (Synsyllis) Verrill, 1900 |
| Eusyllis (Synsyllis) longigularis Verrill, 1900 |
| Eusyllis antillensis Augener, 1922 |
| Eusyllis assimilis von Marenzeller, 1875 |
| Eusyllis blomstrandi Malmgren, 1867 |
| Eusyllis heterocirrata Hartmann-Schröder, 1959 |
| Eusyllis homocirrata Hartmann-Schröder, 1958 |
| Eusyllis kupferi Langerhans, 1879 |
| Eusyllis lamelligera Marion & Bebretzky, 1875 |
| Eusyllis spirocirrata Hartmann-Schröder, 1959 |
| Exogone Örsted, 1845 |
| Exogone (Exogone) Örsted, 1845 |
| Exogone (Exogone) arenosa Perkins, 1981 |
| Exogone (Exogone) bondi Ruíz-Ramírez & Salazar-Vallejo, 2001 |