Syllidae Grube, 1850
Opisthosyllis ankylochaeta Fauvel, 1921
Opisthosyllis arboricola Hartmann-Schröder, 1959
Opisthosyllis australis Augener, 1913
Opisthosyllis brevicirra Hartmann-Schröder, 1979
Opisthosyllis brunnea Langerhans, 1879
Opisthosyllis convexa Lee & Rho, 1994
Opisthosyllis corallicola Hartmann-Schröder, 1965
Opisthosyllis dorsoaciculata Hartmann-Schröder, 1991
Opisthosyllis japonica Imajima, 1966
Opisthosyllis laevis Day, 1957
Opisthosyllis leslieharrisae Aguado, San Martin & Nygren, 2005
Opisthosyllis longicirrata Monro, 1939
Opisthosyllis longidentata San Martín, 1991
Opisthosyllis macroura (Schmarda, 1861)
Opisthosyllis nuchalis Verrill, 1900
Opisthosyllis papillosa Hartmann-Schroeder, 1960
Opisthosyllis simpliseta Hartmann-Schröder, 1981
Opisthosyllis viridis Langerhans, 1879
