1. Family Aporrhaidae J. E. Gray, 1850
2. Family Colombellinidae P. Fischer, 1884 †
3. Family Dilatilabridae Bandel, 2007 †
4. Family Hippochrenidae Bandel, 2007 †
5. Family Lamelliphoridae Korobkov, 1960 †
6. Family Pereiraeidae Bandel, 2007 †
7. Family Rostellariidae Gabb, 1868
8. Family Seraphsidae Gray, 1853
9. Family Strombidae Rafinesque, 1815
10. Family Struthiolariidae Gabb, 1868
11. Family Thersiteidae Savornin, 1914 †
12. Family Xenophoridae Troschel, 1852 (1840)
13. Family Aporrhaididae accepted as Aporrhaidae J. E. Gray, 1850 (misspelling)
14. Family Aporrhaiidae accepted as Aporrhaidae J. E. Gray, 1850 (Spelling variation)
15. Family Chenopidae Deshayes, 1865 accepted as Aporrhaidae J. E. Gray, 1850
16. Family Columbellariidae Zittel, 1895 † accepted as Colombellinidae P. Fischer, 1884 †
17. Family Dicrolomatidae Korotkov, 1992 † accepted as Aporrhaidae J. E. Gray, 1850
18. Family Neostromboidae S. J. Maxwell, Dekkers, Rymer & Congdon, 2019 accepted as Strombidae Rafinesque, 1815 (unavailable name: not based on an available genus group name)
19. Family Onustidae H. Adams & A. Adams, 1854 accepted as Xenophoridae Troschel, 1852 (1840)
20. Family Phoridae Gray, 1840 accepted as Xenophoridae Troschel, 1852 (1840) (homonym of Phoridae Curtis, 1833 based on Phora Latreille, 1796 [Diptera])
21. Family Pterocerellidae Bandel, 2007 † accepted as Pterocerellinae Bandel, 2007 † represented as Aporrhaidae J. E. Gray, 1850 (unaccepted > superseded rank)
22. Family Pteroceridae Haller, 1892 accepted as Strombidae Rafinesque, 1815
23. Family Pugnellidae Kiel & Bandel, 1999 † accepted as Pugnellinae Kiel & Bandel, 1999 † represented as Aporrhaidae J. E. Gray, 1850 (unaccepted > superseded rank)
24. Family Rimellidae R. B. Stewart, 1927 accepted as Rostellariidae Gabb, 1868
25. Family Spinigeridae Korotkov, 1992 † accepted as Spinilomatinae Gründel, Nützel & Schulbert, 2009 represented as Aporrhaidae J. E. Gray, 1850 (invalid: type genus a junior homonym)
26. Family Terebellidae H. Adams & A. Adams, 1854 accepted as Seraphsidae Gray, 1853 (Homonym of Terebellidae Johnston, 1846 based on Terebella Linnaeus, 1767 [Annelida])
27. Family Tibiidae A. N. Golikov & Starobogatov, 1975 accepted as Rostellariidae Gabb, 1868
28. Family Zitteliidae Schilder, 1936 † accepted as Colombellinidae P. Fischer, 1884 †

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