Harpacticoida G. O. Sars, 1903

Adenopleurellidae Huys, 1990

Aegisthidae Giesbrecht, 1893

Ambunguipedidae Huys, 1990

Ameiridae Monard, 1927

Ancorabolidae Sars, 1909

Anopherura Templeton, 1836

Arenopontiidae Martínez Arbizu & Moura, 1994

Argestidae Por, 1986

Balaenophilidae Sars, 1910

Cancricola

Cancrincolidae Fiers, 1990

Canthocamptidae G. O. Sars, 1906

Canuellidae Lang, 1944

Cerviniidae Sars, 1903

Chappuisiidae Chappuis, 1940

Cletodidae T. Scott, 1905

Cletopsyllidae Huys & Williams, 1989

Clytemnestridae Scott, 1909

Cristacoxidae Huys, 1990

Cylindropsyllidae Sars, 1909

Dactylopina Brady, 1910

Dactylopusiidae Sars G.O., 1905

Danielsseniidae

Darcythompsoniidae Lang, 1936

Diosaccidae G. O. Sars, 1906

Ectinosomatidae Sars, 1903

Euterpinidae Brian, 1921

Hamondiidae Huys, 1990

Harpacticidae Dana, 1846

Heteropsyllidae Kornev & Chertoprud, 2008

Huntemanniidae Por, 1986

Idyanthidae Lang, 1948

Laophontidae Scott, 1905

Laophontopsidae Huys & Willems, 1989

Latiremidae Bozic, 1969

Leptastacidae Lang, 1948

Leptopontiidae Lang, 1948

Lingulocamptus Guo, 1998

Longipediidae Sars, 1903

Louriniidae Monard, 1927

Metidae Sars, 1910

Miraciidae Dana, 1846

Nannopodidae Brady, 1880

Neobradyidae Oloffson, 1917

Normanellidae Lang, 1944

Novocriniidae Huys & Iliffe, 1998

Orthopsyllidae Huys, 1990

Parameiropsidae Corgosinho & Martínez Arbizu, 2010

Paramesochridae Lang, 1944

Parastenheliidae Lang, 1936

Parastenocarididae Chappuis, 1933

Peltidiidae Sars, 1904

Phyllognathopodidae Gurney, 1932

Porcellidiidae Boeck, 1865

Protolatiremidae Bozic, 1969

Pseudotachidiidae Lang, 1936

Psilomallus Kroyer, 1863

Rhizothricidae Por, 1986

Rhynchothalestridae Lang, 1948

Rometidae Seifried & Schminke, 2003

Rotundiclipeidae Huys, 1988

Ryloviella Borutsky, 1930

Styracothoracidae Huys, 1993

Superornatiremidae Huys, 1997

Tachidiidae Boeck, 1865

Tegastidae Sars, 1904

Tetragonicipitidae Lang, 1944

Thalestridae Sars, 1905

Thompsonulidae Lang, 1944

Tisbidae Stebbing, 1910