Sphaerosyllis is een geslacht van borstelwormen uit de familie van de Syllidae. Sphaerosyllis werd voor het eerst wetenschappelijk beschreven door Claparède in 1863.
Soorten De volgende soorten zijn bij het geslacht ingedeeld: Sphaerosyllis aciculata , 1981 Sphaerosyllis annulata , 2004 Sphaerosyllis antarctica , 1906 Sphaerosyllis arenaceus Sphaerosyllis asiatica , 1980 Sphaerosyllis austriaca , 1959 Sphaerosyllis bardukaciculata , 2005 Sphaerosyllis bifurcata (, 1979) Sphaerosyllis bifurcatoides (, 1979) Sphaerosyllis bilineata , 1995 Sphaerosyllis bilobata , 1981 Sphaerosyllis boeroi , 2005 Sphaerosyllis brasiliensis , 2001 Sphaerosyllis brevidentata , 1981 Sphaerosyllis brevifrons , 1884 Sphaerosyllis bulbosa , 1914 Sphaerosyllis californiensis , 1966 Sphaerosyllis capensis , 1953 Sphaerosyllis ceciliae , 2017 Sphaerosyllis chinensis , 1992 Sphaerosyllis claparedei , 1864 Sphaerosyllis claparedi , 1864 Sphaerosyllis claparedii , 1864 Sphaerosyllis climenti , 2012 Sphaerosyllis cuticulata , 1991 Sphaerosyllis dubiosa , 1962 Sphaerosyllis fortuita , 1879 Sphaerosyllis georgeharrisoni , 2005 Sphaerosyllis glandulata , 1981 Sphaerosyllis goorabantennata , 2005 Sphaerosyllis gravinae , 1994 Sphaerosyllis hermaphrodita , 1990 Sphaerosyllis hirsuta , 1897 Sphaerosyllis hystrix , 1863 Sphaerosyllis iliffei , 2009 Sphaerosyllis joinvillensis , 1988 Sphaerosyllis labyrinthophila , 1979 Sphaerosyllis lateropapillata , 1986 Sphaerosyllis latipalpis , 1883 Sphaerosyllis levantina , 2011 Sphaerosyllis longilamina , 1989 Sphaerosyllis magnidentata , 1981 Sphaerosyllis minima , 1960 Sphaerosyllis monicae , 2017 Sphaerosyllis mussismiliaicola , 2001 Sphaerosyllis ovigera , 1879 Sphaerosyllis palpopapillata , 1992 Sphaerosyllis papillifera , 1933 Sphaerosyllis parabulbosa , 2002 Sphaerosyllis parapionosylliiformis , 1962 Sphaerosyllis parvoculata , 1989 Sphaerosyllis perkinsi , 1991 Sphaerosyllis pirifera , 1868 Sphaerosyllis piriferopsis , 1981 Sphaerosyllis pontica , 2017 Sphaerosyllis pumila , 1974 Sphaerosyllis pygipapillata , 1981 Sphaerosyllis ranunculus , 1995 Sphaerosyllis renaudae , 1958 Sphaerosyllis ridgensis , 1990 Sphaerosyllis riseri , 1981 Sphaerosyllis rotundipapillata , 1982 Sphaerosyllis ruthae , 2004 Sphaerosyllis sandrae , 2009 Sphaerosyllis sanmartini , 2004 Sphaerosyllis semiverrucosa , 1913 Sphaerosyllis sexpapillata , 1979 Sphaerosyllis tarquei , 2017 Sphaerosyllis taylori , 1981 Sphaerosyllis tetralobata , 2016 Sphaerosyllis thomasi , 1984 Sphaerosyllis voluntariorum , 2005
Synoniemen Sphaerosyllis (Prosphaerosyllis) nathani San Martín & López, 1998 ⇒ Prosphaerosyllis nathani (San Martín & López, 1998) Sphaerosyllis bidentata Hartmann-Schröder, 1974 ⇒ Erinaceusyllis bidentata (Hartmann-Schröder, 1974) Sphaerosyllis brandhorsti Hartmann-Schröder, 1965 ⇒ Prosphaerosyllis brandhorsti (Hartmann-Schröder, 1965) Sphaerosyllis brevicirra Hartmann-Schröder, 1960 ⇒ Prosphaerosyllis brevicirra (Hartmann-Schröder, 1960) Sphaerosyllis campoyi San Martín, Acero, Contonente & Gomez, 1982 ⇒ Prosphaerosyllis campoyi (San Martín, Acero, Contonente & Gomez, 1982) Sphaerosyllis centroamericana Hartmann-Schröder, 1959 ⇒ Erinaceusyllis centroamericana (Hartmann-Schröder, 1959) Sphaerosyllis cryptica Ben-Eliahu, 1977 ⇒ Erinaceusyllis cryptica (Ben-Eliahu, 1977) Sphaerosyllis erinaceus Claparède, 1863 ⇒ Erinaceusyllis erinaceus (Claparède, 1863) Sphaerosyllis giandoi Somaschini & San Martín, 1994 ⇒ Prosphaerosyllis giandoi (Somaschini & San Martín, 1994) Sphaerosyllis horrocksensis (Hartmann-Schröder, 1982) ⇒ Erinaceusyllis horrocksensis (Hartmann-Schröder, 1981) Sphaerosyllis isabellae Nogueira, San Martín & Amaral, 2001 ⇒ Prosphaerosyllis isabellae (Nogueira, San Martín & Amaral, 2001) Sphaerosyllis kerguelensis McIntosh, 1885 ⇒ Prosphaerosyllis kerguelensis (McIntosh, 1885) Sphaerosyllis longicauda Webster & Benedict, 1887 ⇒ Prosphaerosyllis longicauda (Webster & Benedict, 1887) Sphaerosyllis longicirrata Webster & Benedict, 1884 ⇒ Parapionosyllis longicirrata (Webster & Benedict, 1884) Sphaerosyllis longipapillata Hartmann-Schröder, 1979 ⇒ Prosphaerosyllis longipapillata (Hartmann-Schröder, 1979) Sphaerosyllis magnoculata Hartmann-Schröder, 1986 ⇒ Prosphaerosyllis magnoculata (Hartmann-Schröder, 1986) Sphaerosyllis mcintoshi Ehlers, 1897 ⇒ Salvatoria kerguelensis McIntosh, 1885 Sphaerosyllis multipapillata Hartmann-Schröder, 1979 ⇒ Prosphaerosyllis multipapillata (Hartmann-Schröder, 1979) Sphaerosyllis nathani San Martín & López, 1998 ⇒ Prosphaerosyllis nathani (San Martín & López, 1998) Sphaerosyllis opisthoculata Hartmann-Schröder, 1979 ⇒ Prosphaerosyllis opisthoculata (Hartmann-Schröder, 1979) Sphaerosyllis papillosissima Hartmann-Schröder, 1979 ⇒ Prosphaerosyllis papillosissima (Hartmann-Schröder, 1979) Sphaerosyllis perspicax Ehlers, 1908 ⇒ Erinaceusyllis perspicax (Ehlers, 1908) Sphaerosyllis retrodens Ehlers, 1897 ⇒ Sphaerosyllis kerguelensis McIntosh, 1885 ⇒ Prosphaerosyllis kerguelensis (McIntosh, 1885) Sphaerosyllis sublaevis Ehlers, 1913 a⇒ Prosphaerosyllis sublaevis (Ehlers, 1913) Sphaerosyllis subterranea Hartmann-Schröder, 1965 ⇒ Erinaceusyllis subterranea (Hartmann-Schröder, 1965)