| Family | Adenopleurellidae Huys, 1990
| 3 3 | Genera Species |
| Family | Aegisthidae Giesbrecht, 1893
| 31 128 | Genera Species |
| Family | Ambunguipedidae Huys, 1990 ⇒ Hamondiidae
| 1 3 | Genus Species |
| Family | Ameiridae Monard, 1927
| 63 751 | Genera Species |
| Family | Ancorabolidae Sars, 1909
| 27 126 | Genera Species |
| Family | Arenopontiidae Martínez Arbizu & Moura, 1994
| 5 42 | Genera Species |
| Family | Argestidae Por, 1986
| 25 131 | Genera Species |
| Family | Balaenophilidae Sars, 1910
| 2 5 | Genera Species |
| Family | Cancrincolidae Fiers, 1990
| 4 8 | Genera Species |
| Family | Canthocamptidae G. O. Sars, 1906
| 118 1739 | Genera Species |
| Family | Canuellidae Lang, 1944
| 19 101 | Genera Species |
| Family | Cerviniidae Sars, 1903 ⇒ Aegisthidae
| 1 3 | Genus Species |
| Family | Chappuisiidae Chappuis, 1940
| 1 2 | Genus Species |
| Family | Cletodidae T. Scott, 1905
| 40 302 | Genera Species |
| Family | Cletopsyllidae Huys & Williams, 1989
| 7 17 | Genera Species |
| Family | Clytemnestridae Scott, 1909
| 3 11 | Genera Species |
| Family | Cristacoxidae Huys, 1990
| 3 3 | Genera Species |
| Family | Cylindropsyllidae Sars, 1909
| 15 70 | Genera Species |
| Family | Dactylopusiidae Lang, 1936 ⇒ Dactylopusiinae
| 1 0 | Genus Species |
| Family | Danielsseniidae Huys & Gee, 1996 ⇒ Pseudotachidiidae
| 1 0 | Genus Species |
| Family | Darcythompsoniidae Lang, 1936
| 7 52 | Genera Species |
| Family | Diosaccidae G. O. Sars, 1906 ⇒ Miraciidae
| 4 45 | Genera Species |
| Family | Ectinosomatidae G. O. Sars, 1903
| 36 461 | Genera Species |
| Family | Ectinosomidae G.O. Sars, 1903
| 0 0 | Genera Species |
| Family | Euterpinidae Brian, 1921
| 1 5 | Genus Species |
| Family | Hamondiidae Huys, 1990
| 3 2 | Genera Species |
| Family | Harpacticidae Dana, 1846
| 20 201 | Genera Species |
| Family | Heteropsyllidae Kornev & Chertoprud, 2008
| 0 0 | Genera Species |
| Family | Huntemanniidae Por, 1986 ⇒ Nannopodidae
| 4 56 | Genera Species |
| Family | Idyaeidae Sars, 1910 ⇒ Tisbidae
| 0 0 | Genera Species |
| Family | Idyanthidae Lang, 1944
| 7 12 | Genera Species |
| Family | Ismardiidae Leigh-Sharpe, 1936 ⇒ Harpacticidae
| 0 0 | Genera Species |
| Family | Laophontidae Scott, 1905
| 100 648 | Genera Species |
| Family | Laophontopsidae Huys & Willems, 1989
| 3 16 | Genera Species |
| Family | Latiremidae Bozic, 1969
| 3 8 | Genera Species |
| Family | Leptastacidae Lang, 1948
| 18 121 | Genera Species |
| Family | Leptopontiidae Lang, 1948
| 10 77 | Genera Species |
| Family | Longipediidae Sars, 1903
| 1 32 | Genus Species |
| Family | Louriniidae Monard, 1927
| 4 19 | Genera Species |
| Family | Metahuntemanniidae Por, 1986 ⇒ Canthocamptidae
| 0 0 | Genera Species |
| Family | Metidae Sars, 1910
| 14 38 | Genera Species |
| Family | Miracidae Dana, 1846 ⇒ Miraciidae
| 0 0 | Genera Species |
| Family | Miraciidae Dana, 1846
| 82 972 | Genera Species |
| Family | Nannopodidae Brady, 1880
| 10 20 | Genera Species |
| Family | Neobradyidae Oloffson, 1917
| 3 10 | Genera Species |
| Family | Normanellidae Lang, 1944
| 4 32 | Genera Species |
| Family | Novocriniidae Huys & Iliffe, 1998
| 3 6 | Genera Species |
| Family | Orthopsyllidae Huys, 1990
| 3 24 | Genera Species |
| Family | Parameiropsidae Corgosinho & Martínez Arbizu, 2010
| 0 0 | Genera Species |
| Family | Paramesochridae Lang, 1944
| 25 319 | Genera Species |
| Family | Paranannopidae Por, 1986 ⇒ Pseudotachidiidae
| 0 0 | Genera Species |
| Family | Parastenheliidae Lang, 1936
| 8 49 | Genera Species |
| Family | Parastenocarididae Chappuis, 1933
| 42 549 | Genera Species |
| Family | Parastentheliidae Lang, 1936 ⇒ Parastenheliidae
| 0 0 | Genera Species |
| Family | Peltidiidae Sars, 1904
| 20 132 | Genera Species |
| Family | Phyllognathopodidae Gurney, 1932
| 7 20 | Genera Species |
| Family | Porcellidiidae Boeck, 1865
| 18 153 | Genera Species |
| Family | Protolatiremidae Bozic, 1969
| 0 0 | Genera Species |
| Family | Psammopsyllidae ⇒ Leptopontiidae
| 0 0 | Genera Species |
| Family | Pseudopeltidiidae Poppe, 1891
| 0 0 | Genera Species |
| Family | Pseudotachidiidae Lang, 1936
| 29 179 | Genera Species |
| Family | Rhizothricidae Por, 1986 ⇒ Rhizotrichidae
| 2 31 | Genera Species |
| Family | Rhizotrichidae Por, 1986
| 2 2 | Genera Species |
| Family | Rhynchothalestridae Lang, 1948 ⇒ Thalestridae
| 1 1 | Genus Species |
| Family | Rometidae Seifried & Schminke, 2003
| 1 1 | Genus Species |
| Family | Rotundiclipeidae Huys, 1988
| 1 1 | Genus Species |
| Family | Styracothoracidae Huys, 1993 ⇒ Idyanthidae
| 0 0 | Genera Species |
| Family | Superornatiremidae Huys, 1997
| 5 10 | Genera Species |
| Family | Tachidiidae Boeck, 1865
| 13 49 | Genera Species |
| Family | Tegastidae G. O. Sars, 1904
| 11 111 | Genera Species |
| Family | Tetragonicepsidae Lang, 1944
| 1 0 | Genus Species |
| Family | Tetragonicipitidae Lang, 1944
| 18 156 | Genera Species |
| Family | Thalestridae Sars, 1905
| 38 502 | Genera Species |
| Family | Thompsonulidae Lang, 1944
| 3 8 | Genera Species |
| Family | Tisbidae Stebbing, 1910
| 44 308 | Genera Species |
| Family | Zosimeidae Seifried, 2003
| 2 4 | Genera Species |
| Family | Zosimidae Seifried, 2003 ⇒ Zosimeidae
| 0 0 | Genera Species |
| Genus | Anopherura Templeton, 1836
| 1 | Species |
| Genus | Cancricola
| 2 | Species |
| Genus | Dactylopina Brady, 1910
| 2 | Species |
| Genus | Lingulocamptus Guo, 1998
| 0 | Species |
| Genus | Psilomallus Krøyer, 1863
| 1 | Species |
| Genus | Ryloviella Borutsky, 1931
| 4 | Species |
| Genus | Tisemus Monard, 1928
| 1 | Species |