Diacyclops Kiefer, 1927

Diacyclops abyssicola (Lilljeborg, 1901)

Diacyclops alabamensis J. W. Reid, 1992

Diacyclops albus J. W. Reid, 1992

Diacyclops alticola (Kiefer, 1935)

Diacyclops andinus Locascio de Mitrovich & Menu-Marque, 2001

Diacyclops antrincola Kiefer, 1967

Diacyclops arenosus (Mazepova, 1950)

Diacyclops badeniae Kiefer, 1958

Diacyclops balearicus Lescher-Moutoué, 1978

Diacyclops belgicus Kiefer, 1936

Diacyclops bernardi (Petkovski, 1986)

Diacyclops biceri Boxshall, Evstigneeva & Clark, 1993

Diacyclops bicuspidatus (Claus, 1857)

Diacyclops bisetosus (Rehberg, 1880)

Diacyclops biwensis Ishida, 2005

Diacyclops brevifurcus Ishida, 2006

Diacyclops cerberus Chappuis, 1934

Diacyclops chakan Fiers & Reid in Fiers et al., 1996

Diacyclops charon (Kiefer, 1931)

Diacyclops chrisae J. W. Reid, 1992

Diacyclops clandestinus (Yeatman, 1964)

Diacyclops cohabitatus Monchenko, 1980

Diacyclops cohabitus Monchenko, 1980

Diacyclops conversus Reid, 2004

Diacyclops crassicaudis (G. O. Sars, 1863)

Diacyclops crassicaudoides (Kiefer, 1928)

Diacyclops cristinae Pesce & Galassi, 1987

Diacyclops cryonastes Morton, 1985

Diacyclops danielopoli Pospisil & Stoch, 1999

Diacyclops dimorphus J. W. Reid & Strayer, 1994

Diacyclops disjunctus Thallwitz, 1927

Diacyclops dispinosus Ishida, 1994

Diacyclops ecabensis Fiers, Ghenne & Suárez-Morales, 2000

Diacyclops einslei De Laurentiis, Pesce & Humphreys, 1999

Diacyclops ekmani (Lindberg, 1950)

Diacyclops elegans (Mazepova, 1962)

Diacyclops eriophori Gurney, 1927

Diacyclops eulitoralis Alekseev & Arov, 1986

Diacyclops felix Pospisil & Stoch, 1999

Diacyclops fontinalis Naidenov, 1969

Diacyclops galbinus (Mazepova, 1962)

Diacyclops gauthieri Green, 1962

Diacyclops goticus (Kiefer, 1931)

Diacyclops harryi J. W. Reid, 1992

Diacyclops haueri (Kiefer, 1931)

Diacyclops hispidus Reid, 1988

Diacyclops humphreysi Pesce & De Laurentiis, 1996

Diacyclops hypnicola (Gurney, 1927)

Diacyclops hypogeus Kiefer, 1930

Diacyclops ichnusae Pesce & Galassi, 1986

Diacyclops ichnusoides Petkovski & Karanovic, 1997

Diacyclops imparilis Monchenko, 1985

Diacyclops improcerus (Mazepova, 1950)

Diacyclops incolotaenia (Mazepova, 1950)

Diacyclops indianensis Reid, 2004

Diacyclops insularis Monchenko, 1982

Diacyclops intermedius (Mazepova, 1952)

Diacyclops iranicus Pesce & Maggi, 1982

Diacyclops italianus (Kiefer, 1931)

Diacyclops jasnitskii (Mazepova, 1950)

Diacyclops jeanneli (Chappuis, 1929)

Diacyclops karamani (Kiefer, 1932)

Diacyclops konstantini (Mazepova, 1962)

Diacyclops kyotensis ItoTak, 1964

Diacyclops laisi Kiefer, 1936

Diacyclops landei (Mahoon & Zia, 1985)

Diacyclops languidoides (Lilljeborg, 1901)

Diacyclops languidulus (Willey, 1925)

Diacyclops languidus (G. O. Sars, 1863)

Diacyclops lewisi Reid, 2004

Diacyclops limnobius Kiefer, 1978

Diacyclops lindae Pesce, 1986

Diacyclops longifurcus (Shen & Sung, 1963)

Diacyclops maggii Pesce & Galassi, 1987

Diacyclops michaelseni (Mrázek, 1901)

Diacyclops minutissimus (Kiefer, 1933)

Diacyclops mirnyi (Borutsky & Vinogradov, 1957)

Diacyclops nagatoensis ItoTak, 1964

Diacyclops nanus (G. O. Sars, 1863)

Diacyclops navus (Herrick, 1882)

Diacyclops nearcticus (Kiefer, 1934)

Diacyclops neglectus Flössner, 1984

Diacyclops nuragicus Pesce & Galassi, 1986

Diacyclops odessanus (Shmankevich, 1875)

Diacyclops palustris J. W. Reid, 1988

Diacyclops paolae Pesce & Galassi, 1987

Diacyclops paralanguidoides Pesce & Galassi, 1987

Diacyclops pelagonicus Petkovski, 1971

Diacyclops pilosus Fiers, Ghenne & Suárez-Morales, 2000

Diacyclops plattensis (Pennak & Ward, 1985)

Diacyclops puuc Fiers in Fiers et al., 1996

Diacyclops reidae De Laurentiis, Pesce & Humphreys, 1999

Diacyclops ruffoi Kiefer, 1981

Diacyclops salisae Reid, 2004

Diacyclops sardous Pesce & Galassi, 1987

Diacyclops scanloni Karanovic, 2006

Diacyclops skopljensis (Kiefer, 1932)

Diacyclops skottsbergi (Lindberg, 1949)

Diacyclops slovenicus Petkovski, 1954

Diacyclops sobeprolatus Karanovic, 2006

Diacyclops sororum J. W. Reid, 1992

Diacyclops spongicola (Mazepova, 1962)

Diacyclops stammeri (Kiefer, 1931)

Diacyclops stygius (Chappuis, 1924)

Diacyclops suoensis ItoTak, 1954

Diacyclops talievi (Mazepova, 1970)

Diacyclops tantalus Kiefer, 1937

Diacyclops tenuispinalis Shen & Sung, 1963

Diacyclops thomasi (S. A. Forbes, 1882)

Diacyclops trajani Reid & Strayer, 1994

Diacyclops uruguayensis (Kiefer, 1935)

Diacyclops versutus (Mazepova, 1961)

Diacyclops yeatmani J. W. Reid, 1988

Diacyclops yezoensis (ItoTak, 1953)

Diacyclops zhimulevi Sheveleva, Timoshkin, Aleksandrov & Tereza, 2010