Dentatisyllis carolinae (Day, 1973)
Ehlersia ferrugina Langerhans, 1881 accepted as Paraehlersia ferrugina (Langerhans, 1881)
Haplosyllis spongiphila (Verrill, 1885)
Syllis alternata Moore, 1908
Syllis armillaris (O.F. Müller, 1776)
Syllis cornuta Rathke, 1843
Syllis elongata (Johnson, 1901)
Syllis fasciata Malmgren, 1867
Syllis ferrugina (Langerhans, 1881) accepted as Paraehlersia ferrugina (Langerhans, 1881)
Syllis gracilis Grube, 1840
Syllis hyalina Grube, 1863
Syllis spongiphila Verrill, 1885 accepted as Haplosyllis spongiphila (Verrill, 1885)
Typosyllis armillaris (O.F. Müller, 1776) accepted as Syllis armillaris (O.F. Müller, 1776)
Typosyllis fasciata (Malmgren, 1867) accepted as Syllis fasciata Malmgren, 1867
Typosyllis pallida (Verrill, 1875) (uncertain > nomen dubium )