This is a list of 120 species in Diacyclops, a genus of cyclopoid copepods in the family Cyclopidae.[1][2][3][4]
- Diacyclops abyssicola (Lilljeborg, 1901) c g
- Diacyclops alabamensis J. W. Reid, 1992 i c g
- Diacyclops albus J. W. Reid, 1992 i c g
- Diacyclops alticola (Kiefer, 1935) c g
- Diacyclops andinus Locascio de Mitrovich & Menu-Marque, 2001 c g
- Diacyclops antrincola Kiefer, 1967 c g
- Diacyclops arenosus (Mazepova, 1950) c g
- Diacyclops badeniae Kiefer, 1958 c g
- Diacyclops balearicus Lescher-Moutoué, 1978 c g
- Diacyclops belgicus Kiefer, 1936 g
- Diacyclops bernardi (Petkovski, 1986) i c g
- Diacyclops biceri Boxshall, Evstigneeva & Clark, 1993 c g
- Diacyclops bicuspidatus (Claus, 1857) i c g
- Diacyclops bisetosus (Rehberg, 1880) i c g
- Diacyclops brevifurcus Ishida, 2006 c g
- Diacyclops chakan Fiers and Reid in Fiers et al., 1996 i c g
- Diacyclops charon (Kiefer, 1931) c g
- Diacyclops chrisae J. W. Reid, 1992 i c g
- Diacyclops clandestinus (Yeatman, 1964) c g
- Diacyclops cohabitatus Monchenko, 1980 c g
- Diacyclops cohabitus Monchenko, 1980 g
- Diacyclops conversus Reid, 2004 c g
- Diacyclops crassicaudis (G. O. Sars, 1863) i c g
- Diacyclops crassicaudoides (Kiefer, 1928) c g
- Diacyclops cristinae Pesce & Galassi, 1987 c g
- Diacyclops cryonastes Morton, 1985 c g
- Diacyclops danielopoli Pospisil & Stoch, 1999 c g
- Diacyclops dimorphus J. W. Reid and Strayer, 1994 i c g
- Diacyclops disjunctus Thallwitz, 1927 c g
- Diacyclops dispinosus Ishida, 1994 c g
- Diacyclops ecabensis Fiers, Ghenne & Suárez-Morales, 2000 c g
- Diacyclops einslei De Laurentiis, Pesce & Humphreys, 1999 c g
- Diacyclops ekmani (Lindberg, 1950) c g
- Diacyclops elegans (Mazepova, 1962) c g
- Diacyclops eriophori Gurney, 1927 c g
- Diacyclops eulitoralis Alekseev & Arov, 1986 c g
- Diacyclops felix Pospisil & Stoch, 1999 c g
- Diacyclops fontinalis Naidenov, 1969 c g
- Diacyclops galbinus (Mazepova, 1962) c g
- Diacyclops gauthieri Green, 1962 c g
- Diacyclops goticus (Kiefer, 1931) g
- Diacyclops hanguk Karanovic, Grygier & Lee, 2013 c g
- Diacyclops harryi J. W. Reid, 1992 i c g
- Diacyclops haueri (Kiefer, 1931) i c g
- Diacyclops hispidus Reid, 1988 c g
- Diacyclops hisuta Karanovic, Grygier & Lee, 2013 c g
- Diacyclops humphreysi Pesce & De Laurentiis, 1996 c g
- Diacyclops hypnicola (Gurney, 1927) i c g
- Diacyclops hypogeus Kiefer, 1930 c g
- Diacyclops ichnusae Pesce & Galassi, 1986 c g
- Diacyclops ichnusoides Petkovski & Karanovic, 1997 c g
- Diacyclops imparilis Monchenko, 1985 c g
- Diacyclops improcerus (Mazepova, 1950) c g
- Diacyclops incolotaenia (Mazepova, 1950) c g
- Diacyclops indianensis Reid, 2004 c g
- Diacyclops insularis Monchenko, 1982 c g
- Diacyclops intermedius (Mazepova, 1952) c g
- Diacyclops iranicus Pesce & Maggi, 1982 c g
- Diacyclops ishidai Karanovic, Grygier & Lee, 2013 c g
- Diacyclops italianus (Kiefer, 1931) g
- Diacyclops jasnitskii (Mazepova, 1950) c g
- Diacyclops jeanneli (Chappuis, 1929) i c g
- Diacyclops joycei Karanovic, Gibson, Hawes, Andersen & Stevens, 2014 c g
- Diacyclops jurenei Parveen, Mahoon & Saleem, 1988 c g
- Diacyclops karamani (Kiefer, 1932) c g
- Diacyclops kaupi Karanovic, Gibson, Hawes, Andersen & Stevens, 2014 c g
- Diacyclops konstantini (Mazepova, 1962) c g
- Diacyclops kyotensis ItoTak, 1964 c g
- Diacyclops landei (Mahoon & Zia, 1985) c g
- Diacyclops languidoides (Lilljeborg, 1901) i
- Diacyclops languidulus (Willey, 1925) c g
- Diacyclops languidus (G. O. Sars, 1863) i
- Diacyclops leeae Karanovic, Grygier & Lee, 2013 c g
- Diacyclops lewisi Reid, 2004 c g
- Diacyclops limnobius Kiefer, 1978 c g
- Diacyclops lindae Pesce, 1984 c g
- Diacyclops longifurcus (Shen & Sung, 1963) c g
- Diacyclops maggii Pesce & Galassi, 1987 c g
- Diacyclops michaelseni (Mrazek, 1901) c g
- Diacyclops mirnyi (Borutsky & Vinogradov, 1957) c g
- Diacyclops nagatoensis ItoTak, 1964 c g
- Diacyclops nanus (G. O. Sars, 1863) i
- Diacyclops navus (Herrick, 1882) i c g
- Diacyclops nearcticus (Kiefer, 1934) i c g
- Diacyclops neglectus Flössner, 1984 c g
- Diacyclops nikolasarburni Suárez-Morales, Mercado-Salas & Barlow, 2013 c g
- Diacyclops nuragicus Pesce & Galassi, 1986 c g
- Diacyclops odessanus (Shmankevich, 1875) c g
- Diacyclops palustris J. W. Reid, 1988 i c g
- Diacyclops paolae Pesce & Galassi, 1987 c g
- Diacyclops parahanguk Karanovic, Grygier & Lee, 2013 c g
- Diacyclops paralanguidoides Pesce & Galassi, 1987 c g
- Diacyclops parasuoensis Karanovic, Grygier & Lee, 2013 c g
- Diacyclops pelagonicus Petkovski, 1971 c g
- Diacyclops pilosus Fiers, Ghenne & Suárez-Morales, 2000 c g
- Diacyclops pseudosuoensis Karanovic, Grygier & Lee, 2013 c g
- Diacyclops puuc Fiers in Fiers et al., 1996 i c g
- Diacyclops reidae De Laurentiis, Pesce & Humphreys, 1999 c g
- Diacyclops ruffoi Kiefer, 1981 g
- Diacyclops salisae Reid, 2004 c g
- Diacyclops sardous Pesce & Galassi, 1987 c g
- Diacyclops scanloni Karanovic, 2006 c g
- Diacyclops skopljensis (Kiefer, 1932) c g
- Diacyclops slovenicus Petkovski, 1954 c g
- Diacyclops sobeprolatus Karanovic, 2006 c g
- Diacyclops sororum J. W. Reid, 1992 i c g
- Diacyclops spongicola (Mazepova, 1962) c g
- Diacyclops suoensis ItoTak, 1954 c g
- Diacyclops talievi (Mazepova, 1970) c g
- Diacyclops tantalus Kiefer, 1937 c g
- Diacyclops tenuispinalis Shen & Sung, 1963 c g
- Diacyclops thomasi (S. A. Forbes, 1882) i c g b
- Diacyclops trajani Reid & Strayer, 1994 c g
- Diacyclops uruguayensis (Kiefer, 1935) c g
- Diacyclops versutus (Mazepova, 1961) c g
- Diacyclops virginianus Reid, 1993 c g
- Diacyclops walkeri Karanovic, Gibson, Hawes, Andersen & Stevens, 2014 c g
- Diacyclops yeatmani J. W. Reid, 1988 i c g
- Diacyclops zhimulevi Sheveleva, Timoshkin, Aleksandrov & Tereza, 2010 c g
- Diacyclops zschokkei (Graeter, 1910) c g
Data sources: i = ITIS,[1] c = Catalogue of Life,[2] g = GBIF,[3] b = Bugguide.net[4]