1. Family Adenopleurellidae Huys, 1990
2. Family Aegisthidae Giesbrecht, 1893
3. Family Ameiridae Boeck, 1865
4. Family Ancorabolidae Sars G.O., 1909
5. Family Argestidae Por, 1986
6. Family Balaenophilidae Sars G.O., 1910
7. Family Canthocamptidae Brady, 1880
8. Family Ceyloniidae Scott A., 1909
9. Family Cletodidae Scott T., 1904
10. Family Cletopsyllidae Huys & Willems, 1989
11. Family Clytemnestridae Scott A., 1909
12. Family Cristacoxidae Huys, 1990
13. Family Cylindropsyllidae Sars G.O., 1909
14. Family Dactylopusiidae Lang, 1936
15. Family Darcythompsoniidae Lang, 1936
16. Family Ectinosomatidae Sars G.O., 1903
17. Family Hamondiidae Huys, 1990
18. Family Harpacticidae Dana, 1846
19. Family Idyanthidae Lang, 1948
20. Family Laophontidae Scott T., 1905
21. Family Laophontopsidae Huys & Willems, 1989
22. Family Latiremidae Bozic, 1969
23. Family Leptastacidae Lang, 1948
24. Family Leptopontiidae Lang, 1948
25. Family Louriniidae Monard, 1927
26. Family Metidae Boeck, 1873
27. Family Miraciidae Dana, 1846
28. Family Nannopodidae Brady, 1880
29. Family Neobradyidae Olofsson, 1917
30. Family Normanellidae Lang, 1944
31. Family Novocriniidae Huys & Iliffe, 1998
32. Family Orthopsyllidae Huys, 1990
33. Family Parameiropsidae Corgosinho & Martínez Arbizu, 2010
34. Family Paramesochridae Lang, 1944
35. Family Parastenheliidae Lang, 1944
36. Family Parastenocarididae Chappuis, 1940
37. Family Peltidiidae Claus, 1860
38. Family Phyllognathopodidae Gurney, 1932
39. Family Porcellidiidae Boeck, 1865
40. Family Protolatiremidae Bozic, 1969
41. Family Pseudotachidiidae Lang, 1936
42. Family Rhizotrichidae Por, 1986
43. Family Rometidae Seifried & Schminke, 2003
44. Family Rotundiclipeidae Huys, 1988
45. Family Superornatiremidae Huys, 1996
46. Family Tachidiidae Sars G.O., 1909
47. Family Tegastidae Sars G.O., 1904
48. Family Tetragonicipitidae Lang, 1944
49. Family Thalestridae Sars G.O., 1905
50. Family Thompsonulidae Lang, 1944
51. Family Tisbidae Stebbing, 1910
52. Family Zosimeidae Seifried, 2003
53. Family Ambunguipedidae Huys, 1990 accepted as Hamondiidae Huys, 1990 (synonym)
54. Family Arenopontiidae Martínez Arbizu & Moura, 1994 accepted as Arenopontiinae Martinez Arbizu & Moura, 1994
55. Family Atergopediidae Martinez Arbizu & Moura, 1998 accepted as Novocriniidae Huys & Iliffe, 1998 (synonymy)
56. Family Cancrincolidae Fiers, 1990 accepted as Ameiridae Boeck, 1865
57. Family Canthocamptidae Sars G.O., 1906 accepted as Canthocamptidae Brady, 1880 (This is widely used but the authority is incorrect. Sars (1906) upgraded the subfamily Canthocamptinae Brady, 1880 to family level, but in accordance to Art 36 of the ICZN (1999), the authorship must remain with Brady.)
58. Family Cerviniidae Sars G.O., 1903 accepted as Aegisthidae Giesbrecht, 1893 (synonymy)
59. Family Danielsseniidae Huys & Gee, in Huys, Gee, Moore & Hamond, 1996 accepted as Danielsseniinae Huys & Gee, in Huys, Gee, Moore & Hamond, 1996
60. Family Diosaccidae Sars G.O., 1906 accepted as Miraciidae Dana, 1846
61. Family Ectinosomidae Sars G.O., 1903 accepted as Ectinosomatidae Sars G.O., 1903 (synonym - incorrectly formed name, see Moore, 1978)
62. Family Euterpinidae Brian, 1921 accepted as Tachidiidae Sars G.O., 1909
63. Family Heteropsyllidae Kornev & Chertoprud, 2008 accepted as Hemimesochrinae Por, 1986 (synonymy)
64. Family Huntemanniidae Por, 1986 accepted as Nannopodidae Brady, 1880 (synonym according to Huys & Kihara (2010))
65. Family Idyaeidae Sars G.O., 1910 accepted as Tisbidae Stebbing, 1910 (a senior objective synonym of Tisbidae but treated as a nomen oblitum by Huys, 2010)
66. Family Ilyopsyllidae Scott A., 1909 accepted as Metidae Boeck, 1873
67. Family Ismardiidae Leigh-Sharpe, 1936 accepted as Harpacticidae Dana, 1846 (Synonym according to Huys & Song (2004))
68. Family Macrosetellidae Scott A., 1909 accepted as Miraciidae Dana, 1846 (unaccepted > junior subjective synonym)
69. Family Metahuntemanniidae Por, 1986 accepted as Canthocamptidae Brady, 1880 (synonym)
70. Family Paranannopidae Por, 1986 accepted as Paranannopinae Por, 1986 accepted as Danielsseniinae Huys & Gee, in Huys, Gee, Moore & Hamond, 1996 (Paranannopidae was relegated to a subfamily of the Pseudotachidiidae by Willen (1999, 2000))
71. Suborder Polyarthra accepted as Canuelloida
72. Family Pontostratiotidae Scott A., 1909 accepted as Aegisthidae Giesbrecht, 1893
73. Family Psammopsyllidae Krishnaswamy, 1956 accepted as Psammopsyllinae Krishnaswamy, 1956
74. Family Pseudopeltidiidae Poppe, 1891 accepted as Clytemnestrinae Scott A., 1909 accepted as Clytemnestridae Scott A., 1909 (synonym)
75. Family Pteropsyllidae Nicholls, 1944 accepted as Tetragonicipitidae Lang, 1944
76. Family Rhizothricidae Por, 1986 accepted as Rhizotrichidae Por, 1986 (emended spelling (after Boxshall & Halsey: 378))
77. Family Rhynchothalestridae Lang, 1948 accepted as Thalestridae Sars G.O., 1905 (synonym)
78. Family Tetragonicepsidae Lang, 1944 accepted as Tetragonicipitidae Lang, 1944 (incorrectly formed name )

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