Diacyclops is een geslacht van eenoogkreeftjes uit de familie van de Cyclopidae.
Soorten Diacyclops abyssicola (Lilljeborg, 1901) Diacyclops alabamensis Reid, 1992 Diacyclops albus 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 bernardi (Petkovski, 1986) Diacyclops biceri Boxshall, Evstigneeva & Clark, 1993 Diacyclops bicuspidatus (Claus, 1857) Diacyclops bisetosus (Rehberg, 1880) Diacyclops brevifurcus Ishida, 2006 Diacyclops cerberus Chappuis, 1934 Diacyclops chakan Fiers & Reid, 1996 Diacyclops charon (Kiefer, 1931) Diacyclops chrisae Reid, 1992 Diacyclops clandestinus (Yeatman, 1964) Diacyclops cohabitatus 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 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 harryi 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 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 (Sars G.O., 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 (Sars G.O., 1863) Diacyclops navus (Herrick, 1882) Diacyclops nearcticus (Kiefer, 1934) Diacyclops neglectus Flössner, 1984 Diacyclops nuragicus Pesce & Galassi, 1986 Diacyclops odessanus (Shmankevich, 1875) Diacyclops palustris 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, 1996 Diacyclops reidae De Laurentiis, Pesce & Humphreys, 1999 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 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 (Forbes S.A., 1882) Diacyclops trajani Reid & Strayer, 1994 Diacyclops uruguayensis (Kiefer, 1935) Diacyclops versutus (Mazepova, 1961) Diacyclops virginianus Reid, 1993 Diacyclops yeatmani Reid, 1988 Diacyclops yezoensis (ItoTak, 1953) Diacyclops zhimulevi Sheveleva, Timoshkin, Aleksandrov & Tereza, 2010 Diacyclops zschokkei (Graeter, 1910)