Syllidae Grube, 1850
Spaerosyllis rotundipapillata Hartmann-Schröder, 1982
Sphaerosyllis aciculata Perkins, 1980
Sphaerosyllis annulata Nogueira, San Martin & Veronesi, 2004
Sphaerosyllis antarctica Gravier, 1907
Sphaerosyllis arenaceus
Sphaerosyllis asiatica Buzhinskaya, 1980
Sphaerosyllis austriaca Banse, 1959
Sphaerosyllis bardukaciculata San Martin, 2005
Sphaerosyllis belizensis Russell, 1989
Sphaerosyllis benedicti
Sphaerosyllis bifurcata (Hartmann-Schröder, 1979)
Sphaerosyllis bifurcatoides (Hartmann-Schröder, 1979)
Sphaerosyllis bilineata Kudenov & Harris in Blake, Hilbig & Scott, 1995
Sphaerosyllis bilobata Perkins, 1981
Sphaerosyllis boeroi Musco, Çinar & Giangrande, 2005
Sphaerosyllis brasiliensis Nogueira, San Martin & Amaral, 2001
Sphaerosyllis brevidentata Perkins, 1981
Sphaerosyllis bulbosa Southern, 1914
Sphaerosyllis californiensis Hartman, 1966
Sphaerosyllis capensis Day, 1953
Sphaerosyllis centroamericana Hartmann-Schröder, 1974
Sphaerosyllis chinensis Zhao & Wu, 1992
Sphaerosyllis claparedei Ehlers, 1864
Sphaerosyllis claparedi Ehlers, 1864
Sphaerosyllis cuticulata Hartmann-Schröder, 1991
Sphaerosyllis densopapillata Hartmann-Schröder, 1979
Sphaerosyllis dubiosa Hartmann-Schröder, 1962
Sphaerosyllis fortuita Webster, 1879
Sphaerosyllis georgeharrisoni San Martin, 2005
Sphaerosyllis giandoi Somaschini & San Martín, 1994
Sphaerosyllis glandulata Perkins, 1981
Sphaerosyllis goorabantennata San Martin, 2005
Sphaerosyllis gravinae Somaschini & San Martín, 1994
Sphaerosyllis hermaphrodita Westheide, 1990
Sphaerosyllis hirsuta Ehlers, 1897
Sphaerosyllis horrocksensis (Hartmann-Schröder, 1981)
Sphaerosyllis hystrix Claparède, 1863
Sphaerosyllis isabellae Nogueira, San Martin & Amaral, 2001
Sphaerosyllis joinvillensis Hartmann-Schröder & Rosenfeldt, 1988
Sphaerosyllis kerguelensis (McIntosh, 1885)
Sphaerosyllis kooroboral (San Martin)
Sphaerosyllis labrinthophila
Sphaerosyllis labyrinthophila Gardiner & Wilson, 1979
Sphaerosyllis lateropapillata Hartmann-Schröder, 1986
Sphaerosyllis latipalpis Levinsen, 1883
Sphaerosyllis longilamina Russell, 1989
Sphaerosyllis macintoshi Ehlers, 1897
Sphaerosyllis magnidentata Perkins, 1981
Sphaerosyllis magnoculata Hartmann-Schröder, 1986
Sphaerosyllis minima Hartmann-Schröder, 1960
Sphaerosyllis mirusata
Sphaerosyllis multipapillata Hartmann-Schröder, 1979
Sphaerosyllis mussismiliaicola Nogueira, San Martin & Amaral, 2001
Sphaerosyllis nathani San Martin & Lopez, 1998
Sphaerosyllis opisthoculata Hartmann-Schröder, 1979
Sphaerosyllis opisthodentata Hartmann-Schröder, 1987
Sphaerosyllis ovigera Langerhans, 1879
Sphaerosyllis palpopapillata Hartmann-Schröder & Rosenfeldt, 1992
Sphaerosyllis papillifera Naville, 1933
Sphaerosyllis papillosissima Hartmann-Schröder, 1979
Sphaerosyllis parabulbosa San Martín & Lòpez, 2002
Sphaerosyllis parapionosylliformis Hartmann-Schröder, 1962
Sphaerosyllis parvoculata Russell, 1989
Sphaerosyllis perkinsi Riser, 1991
Sphaerosyllis perspicax Ehlers, 1912
Sphaerosyllis pirifera Claparède, 1868
Sphaerosyllis piriferopsis Perkins, 1981
Sphaerosyllis pumila Westheide, 1974
Sphaerosyllis pygipapillata Hartmann-Schröder, 1981
Sphaerosyllis pygopapillata Hartmann-Schröder, 1981
Sphaerosyllis ranunculus Kudenov & Harris in Blake, Hilbig & Scott, 1995
Sphaerosyllis renaudae Hartmann-Schröder, 1958
Sphaerosyllis ridgensis Blake & Hillbig, 1990
Sphaerosyllis riseri Perkins, 1981
Sphaerosyllis rotundipapillata Hartmann-Schröder, 1982
Sphaerosyllis sanmartini Böggemann & Westheide, 2004
Sphaerosyllis semiverrucosa Ehlers, 1913
Sphaerosyllis serratosetosa Hartmann-Schröder, 1982
Sphaerosyllis sexpapillata Hartmann-Schröder, 1979
Sphaerosyllis sublaevis Ehlers, 1913
Sphaerosyllis subterranea Hartmann-Schröder, 1965
Sphaerosyllis taylori Perkins, 1981
Sphaerosyllis thomasi San Martín, 1984
Sphaerosyllis voluntariorum San Martin, 2005