1. Subfamily Anoplosyllinae Aguado & San Martín, 2009
   1. Genus Anoplosyllis Claparède, 1868
   2. Genus Streptospinigera Kudenov, 1983
   3. Genus Streptosyllis Webster & Benedict, 1884
   4. Genus Syllides Örsted, 1845
2. Subfamily Autolytinae Langerhans, 1879
   1. Tribe Autolytini Langerhans, 1879
      1. Genus Epigamia Nygren, 2004
      2. Genus Myrianida Milne Edwards, 1845
      3. Genus Autolytides Malaquin, 1893 accepted as Myrianida Milne Edwards, 1845 (subjective synonym)
      4. Genus Autolytus Grube, 1850 accepted as Myrianida Milne Edwards, 1845 (subjective synonym)
      5. Genus Crithida Gosse, 1855 accepted as Myrianida Milne Edwards, 1845 (subjective synonym)
      6. Genus Diploceraea Grube, 1850 accepted as Myrianida Milne Edwards, 1845 (subjective synonym)
      7. Genus Podonereis [auct. misspelling] accepted as Myrianida Milne Edwards, 1845 (misspelling of Podenereis)
      8. Genus Sacconereis J. Müller, 1853 accepted as Myrianida Milne Edwards, 1845 (subjective synonym)
      9. Genus Sylline Grube, 1860 accepted as Myrianida Milne Edwards, 1845 (subjective synonym)
   2. Tribe Procerini Nygren, 2004
      1. Genus Erseia Nygren, Sundkvist, Mikac & Pleijel, 2010
      2. Genus Imajimaea Nygren, 2004
      3. Genus Levidorum Hartman, 1967
      4. Genus Paraprocerastea San Martín & Alós, 1989
      5. Genus Proceraea Ehlers, 1864
      6. Genus Procerastea Langerhans, 1884
      7. Genus Virchowia Langerhans, 1879
      8. Genus Amytis Savigny, 1822 accepted as Proceraea Ehlers, 1864 (nomen oblitum according to Article 23.9.1 (ICZN, 1999))
      9. Genus Autosyllis Imajima & Hartman, 1964 accepted as Virchowia Langerhans, 1879 (subjective synonym)
      10. Genus Nereisyllis Blainville, 1828 accepted as Proceraea Ehlers, 1864 (nomen oblitum according to Article 23.9.1 (ICZN, 1999))
      11. Genus Polybostrichus Örsted, 1843 accepted as Proceraea Ehlers, 1864 (subjective synonym, male reproductive stolon morphs)
      12. Genus Polynice Savigny, 1822 accepted as Proceraea Ehlers, 1864 (nomen oblitum according to Article 23.9.1 (ICZN, 1999))
      13. Genus Pterautolytus Ehlers, 1907 accepted as Proceraea Ehlers, 1864 (subjective synonym)
      14. Genus Regulatus Imajima, 1966 accepted as Proceraea Ehlers, 1864
3. Subfamily Eusyllinae Malaquin, 1893
   1. Genus Amblyosyllis Grube, 1857
   2. Genus Brevicirrosyllis San Martín, López & Aguado, 2009
   3. Genus Dioplosyllis Gidholm, 1962
   4. Genus Eusyllis Malmgren, 1867
   5. Genus Miscellania Martin, Alós & Sardá, 1990
   6. Genus Neopetitia San Martín, 2003
   7. Genus Nudisyllis Knox & Cameron, 1970
   8. Genus Odontosyllis Claparède, 1863
   9. Genus Opisthodonta Langerhans, 1879
   10. Genus Paraehlersia San Martín, 2003
   11. Genus Perkinsyllis San Martín, López & Aguado, 2009
   12. Genus Pionosyllis Malmgren, 1867
   13. Genus Streptodonta San Martín & Hutchings, 2006
   14. Genus Synmerosyllis San Martín, López & Aguado, 2009
   15. Genus Amblyosillis [misspelling of Amblyosyllis] accepted as Amblyosyllis Grube, 1857 (misspelling of Amblyosyllis)
   16. Genus Desmosyllis Verrill, 1900 accepted as Eusyllis Malmgren, 1867 (subjective synonym)
   17. Genus Gattiola Johnston in Baird, 1861 accepted as Amblyosyllis Grube, 1857
   18. Genus Hesiosyllis Wesenberg Lund, 1950 accepted as Pionosyllis Malmgren, 1867 (subjective synonym)
   19. Genus Nicotia Costa, 1864 accepted as Amblyosyllis Grube, 1857 (subjective synonym)
   20. Genus Thylaciphorus Quatrefages, 1866 accepted as Amblyosyllis Grube, 1857 (subjective synonym)
   21. Genus Umbellisyllis M Sars, 1869 accepted as Odontosyllis Claparède, 1863 (subjective synonym)
4. Subfamily Exogoninae Langerhans, 1879
   1. Genus Brania Quatrefages, 1866
   2. Genus Erinaceusyllis San Martín, 2003
   3. Genus Exogone Örsted, 1845
   4. Genus Parapionosyllis Fauvel, 1923
   5. Genus Parexogone Mesnil & Caullery, 1918
   6. Genus Prosphaerosyllis San Martín, 1984
   7. Genus Salvatoria McIntosh, 1885
   8. Genus Sphaerosyllis Claparède, 1863
   9. Genus Cystonereis Kölliker, 1846 accepted as Exogone Örsted, 1845
   10. Genus Exagone Örsted, 1845 accepted as Exogone Örsted, 1845 (lapsus calami)
   11. Genus Exogona Örsted, 1845 accepted as Exogone Örsted, 1845 (lapsus calami)
   12. Genus Exotokas Ehlers, 1864 accepted as Exogone Örsted, 1845
   13. Genus Gossia Quatrefages, 1866 accepted as Exogone Örsted, 1845 (subjective synonym)
   14. Genus Grubea Quatrefages, 1866 accepted as Salvatoria McIntosh, 1885 (subjective synonym)
   15. Genus Grubeosyllis Verrill, 1900 accepted as Salvatoria McIntosh, 1885 (subjective synonym)
   16. Genus Microsyllis Claparède, 1863 accepted as Exogone Örsted, 1845 (subjective synonym)
   17. Genus Oophylax Ehlers, 1864 accepted as Exogone Örsted, 1845
   18. Genus Paedophylax Claparède, 1868 accepted as Exogone Örsted, 1845 (subjective synonym)
   19. Genus Paedophyllax [auct. misspelling for 'Paedophylax'] accepted as Exogone Örsted, 1845 (unaccepted > misspelling - incorrect subsequent spelling, lapsus calami)
   20. Genus Schmardia Quatrefages, 1866 accepted as Exogone Örsted, 1845
   21. Genus Spermosyllis Claparède, 1864 accepted as Exogone Örsted, 1845
   22. Genus Sylline [ sensu Claparède, 1864, non Grube, 1860 ] accepted as Exogone (Sylline) [ sensu Claparède, 1864, non Grube, 1860 ] accepted as Exogone Örsted, 1845 (unaccepted > misapplication, misapplication of an Autolytinae name to an Exogoninae)
5. Genus Fauvelia Gravier, 1900
6. Genus Irmula Ehlers, 1913
7. Genus Palposyllis Hartmann-Schröder, 1977
8. Genus Pseudosyllis Grube, 1863
9. Subfamily Syllinae Grube, 1850
   1. Genus Branchiosyllis Ehlers, 1887
   2. Genus Eurysyllis Ehlers, 1864
   3. Genus Haplosyllis Langerhans, 1879
   4. Genus Inermosyllis San Martín, 2003
   5. Genus Opisthosyllis Langerhans, 1879
   6. Genus Parasphaerosyllis Monro, 1937
   7. Genus Paratyposyllis Hartmann-Schröder, 1962
   8. Genus Plakosyllis Hartmann-Schröder, 1956
   9. Genus Syllis Lamarck, 1818
   10. Genus Trypanedenta Imajima & Hartman, 1964
   11. Genus Trypanobia Imajima & Hartman, 1964
   12. Genus Trypanosyllis Claparède, 1864
   13. Genus Xenosyllis Marion & Bobretzky, 1875
   14. Genus Aporosyllis Quatrefages, 1866 accepted as Syllis Lamarck, 1818 (subjective synonym)
   15. Genus Chaetosyllis Malmgren, 1867 accepted as Syllis Lamarck, 1818 (subjective synonym)
   16. Genus Ehlersia Quatrefages, 1866 accepted as Syllis Lamarck, 1818 (subjective synonym)
   17. Genus Eurysillis Ehlers, 1864 accepted as Eurysyllis Ehlers, 1864 (lapsus calami)
   18. Genus Geminosyllis Imajima, 1966 accepted as Haplosyllis Langerhans, 1879 (superfluous replacement name, subjective synonym)
   19. Genus Gnathosyllis Schmarda, 1861 accepted as Syllis Lamarck, 1818 (subjective synonym)
   20. Genus Ioda [auctt.] accepted as Ioida Johnston, 1839 accepted as Syllis Lamarck, 1818 (lapsus calami)
   21. Genus Ioida Johnston, 1839 accepted as Syllis Lamarck, 1818 (subjective synonym)
   22. Genus Isosyllis Ehlers, 1864 accepted as Syllis Lamarck, 1818 (subjective synonym)
   23. Genus Langerhansia Czerniavsky, 1881 accepted as Syllis Lamarck, 1818 (subjective synonym)
   24. Genus Pagenstecheria Quatrefages, 1866 accepted as Syllis Lamarck, 1818
   25. Genus Polymastus Claparède, 1864 accepted as Eurysyllis Ehlers, 1864
   26. Genus Tetraglena Quatrefages, 1866 accepted as Trypanosyllis Claparède, 1864
   27. Genus Tetraglene Grube, 1863 accepted as Pseudosyllis Grube, 1863 (unaccepted > junior subjective synonym, simultaneous publication but Pseudosyllis has been preferred subsequently)
   28. Genus Trichosyllis Schmarda, 1861 accepted as Syllis Lamarck, 1818 (subjective synonym)
   29. Genus Typosyllis Langerhans, 1879 accepted as Syllis Lamarck, 1818 (subjective synonym)
10. Subfamily Eurysyllinae Hartman, 1965 accepted as Syllinae Grube, 1850
11. Genus Petitia Siewing, 1956 accepted as Neopetitia San Martín, 2003
12. Genus Pseudobrania San Martín, 1984 accepted as Salvatoria McIntosh, 1885
13. Genus Pseudosyllides Augener, 1927 accepted as Inermosyllis San Martín, 2003 (junior homonym)
14. Genus Pterosyllis Claparède, 1863 accepted as Amblyosyllis Grube, 1857 (subjective synonym)
15. Genus Stephanosyllis Claparède, 1864 accepted as Proceraea Ehlers, 1864
16. Subfamily Syllidae incertae sedis (temporary name)
    1. Genus Umbellisyllys M. Sars, 1869 accepted as Umbellisyllis M Sars, 1869 accepted as Odontosyllis Claparède, 1863 (Lapsus calami)
17. Genus Heterosyllis Claparède, 1863 (uncertain > nomen dubium)

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