Afrocyclops propinquus (Kiefer, 1932) represented as Eucyclops (Subterrocyclops) propinquus Kiefer, 1932 (new combination reference)
Australoeucyclops linderi (Lindberg, 1948) represented as Eucyclops (Subterrocyclops) linderi Lindberg, 1948 (new combination reference)
Cyclops semiserratus Sars G.O., 1909 represented as Eucyclops (Sarsicyclops) semiserratus (Sars, 1909) (source of synonymy)
Cyclops varius speratus Lilljeborg, 1901 represented as Cyclops speratus Lilljeborg, 1901 accepted as Eucyclops speratus (Lilljeborg, 1901) represented as Eucyclops speratus speratus (Lilljeborg, 1901) represented as Eucyclops (Speratocyclops) speratus (Lilljeborg, 1901) (new combination reference)
Defayeicyclops Alekseev & Vaillant in: Alekseev, Haffner, Vaillant & Yusoff, 2013 (additional source)
Defayeicyclops jamaicensis (Reid & Janetzky, 1996) (source of synonymy)
Eucyclops Claus, 1893 (new combination reference)
Eucyclops (Breviramocyclops) Alekseev, 2019 (original description)
Eucyclops (Breviramocyclops) breviramatus Löffler, 1963 (new combination reference)
Eucyclops (Breviramocyclops) edytae Tang & Knott, 2009 (new combination reference)
Eucyclops (Breviramocyclops) puteincola Kiefer, 1981 (new combination reference)
Eucyclops (Breviramocyclops) siolii Herbst, 1962 (new combination reference)
Eucyclops (Ciliocyclops) Alekseev, 2019 (original description)
Eucyclops (Ciliocyclops) ciliatus (Sars G.O., 1909) (new combination reference)
Eucyclops (Denticyclops) Alekseev, 2019 (original description)
Eucyclops (Denticyclops) birmanus Lindberg, 1943 (basis of record)
Eucyclops (Denticyclops) denticulatus (Graeter, 1903) (original description)
Eucyclops (Denticyclops) euacanthus (Sars G.O., 1909) (basis of record)
Eucyclops (Denticyclops) euacanthus baylyi Morton, 1990 (basis of record)
Eucyclops (Denticyclops) euacanthus cognatus Kiefer, 1928 (basis of record)
Eucyclops (Denticyclops) euacanthus lanceolatus Dussart, 1974 (basis of record)
Eucyclops (Denticyclops) ibleicus Pesce & Galassi, 1987 (basis of record)
Eucyclops (Denticyclops) leptacanthus Kiefer, 1956 (basis of record)
Eucyclops (Denticyclops) longispinosus Pesce & Galassi, 1987 (original description)
Eucyclops (Denticyclops) macruroides (Lilljeborg, 1901) (original description)
Eucyclops (Denticyclops) microdenticulatus Lindberg, 1939 (basis of record)
Eucyclops (Denticyclops) neomacruroides Dussart & Fernando, 1990 (original description)
Eucyclops (Denticyclops) pseudoensifer Dussart, 1984 (basis of record)
Eucyclops (Denticyclops) titicacae Kiefer, 1957 (original description)
Eucyclops (Eucyclops) Alekseev, 2019 (new combination reference)
Eucyclops (Eucyclops) roseus Ishida, 1997 represented as Eucyclops (Eucyclops) agiloides roseus Ishida, 1997 (new combination reference)
Eucyclops (Isocyclops) caparti Kiefer, 1957 (additional source)
Eucyclops (Macrurocyclops) Alekseev, 2019 (basis of record)
Eucyclops (Macrurocyclops) angustus (G.O. Sars, 1909) (new combination reference)
Eucyclops (Macrurocyclops) dubius (Sars G.O., 1909) (basis of record)
Eucyclops (Macrurocyclops) laevimargo (G.O. Sars, 1909) (new combination reference)
Eucyclops (Macrurocyclops) macrurus (Sars G.O., 1863) (basis of record)
Eucyclops (Macrurocyclops) madagascariensis Kiefer, 1926 (new combination reference)
Eucyclops (Macrurocyclops) maritimus Alekseev & Monchenko, 2011 (new combination reference)
Eucyclops (Macrurocyclops) orthostylis Lindberg, 1952 (new combination reference)
Eucyclops (Macrurocyclops) persistens Monchenko, 1978 (new combination reference)
Eucyclops (Mrazekicyclops) Alekseev, 2019 (original description)
Eucyclops (Mrazekicyclops) echinatus (Kiefer, 1926) (new combination reference)
Eucyclops (Mrazekicyclops) inarmatus Kiefer, 1932 (new combination reference)
Eucyclops (Mrazekicyclops) miurai Ito Tak, 1952 (new combination reference)
Eucyclops (Mrazekicyclops) stuhlmanni (Mrazek, 1898) (new combination reference)
Eucyclops (Sarsicyclops) Alekseev, 2019 (new combination reference)
Eucyclops (Sarsicyclops) crassispinosus Kiefer, 1932 (new combination reference)
Eucyclops (Sarsicyclops) nichollsi Brehm, 1950 (new combination reference)
Eucyclops (Sarsicyclops) porrectus Kiefer, 1932 (new combination reference)
Eucyclops (Sarsicyclops) semiserratus (Sars, 1909) (new combination reference)
Eucyclops (Sarsicyclops) spatharum Harding, 1942 (new combination reference)
Eucyclops (Speratocyclops) Alekseev, 2019 (new combination reference)
Eucyclops (Speratocyclops) arcanus Alekseev, 1990 (new combination reference)
Eucyclops (Speratocyclops) delongi Alekseev, 2019 (new combination reference)
Eucyclops (Speratocyclops) dumonti Alekseev, 2000 (new combination reference)
Eucyclops (Speratocyclops) leschermoutouae Alekseev & Defaye, 2004 (new combination reference)
Eucyclops (Speratocyclops) productus Kiefer, 1936 (new combination reference)
Eucyclops (Speratocyclops) speratus (Lilljeborg, 1901) (new combination reference)
Eucyclops (Speratocyclops) troposperatus Alekseev & Yusoff, 2013 (new combination reference)
Eucyclops (Subterrocyclops) Alekseev, 2019 (original description)
Eucyclops (Subterrocyclops) bryophilus Llindberg, 1950 (new combination reference)
Eucyclops (Subterrocyclops) chivahensis Lindberg, 1960 (new combination reference)
Eucyclops (Subterrocyclops) delachauxi (Kiefer, 1925) (new combination reference)
Eucyclops (Subterrocyclops) elburziensis Lindberg, 1941 (new combination reference)
Eucyclops (Subterrocyclops) fragilis (Kiefer, 1926) (new combination reference)
Eucyclops (Subterrocyclops) glaber Kiefer, 1935 (new combination reference)
Eucyclops (Subterrocyclops) linderi Lindberg, 1948 (new combination reference)
Eucyclops (Subterrocyclops) nagasakai Uéno, 1934 (new combination reference)
Eucyclops (Subterrocyclops) naphaeus Petkovski, 1971 (new combination reference)
Eucyclops (Subterrocyclops) propinquus Kiefer, 1932 (new combination reference)
Eucyclops (Subterrocyclops) subterraneus (Graeter, 1907) (new combination reference)
Eucyclops (Subterrocyclops) thienemanni Kiefer, 1930 (new combination reference)
Eucyclops (Subterrocyclops) torresphilipi Suárez-Morales, 2004 (new combination reference)
Eucyclops angustus (Sars G.O., 1909) represented as Eucyclops (Macrurocyclops) angustus (G.O. Sars, 1909) (source of synonymy)
Eucyclops arcanus Alekseev, 1990 represented as Eucyclops (Speratocyclops) arcanus Alekseev, 1990 (new combination reference)
Eucyclops baylyi Morton, 1990 represented as Eucyclops (Denticyclops) euacanthus baylyi Morton, 1990 (source of synonymy)
Eucyclops birmanus Lindberg, 1949 represented as Eucyclops birmanus birmanus Lindberg, 1949 represented as Eucyclops (Denticyclops) birmanus Lindberg, 1943 (source of synonymy)
Eucyclops birmanus birmanus Lindberg, 1949 represented as Eucyclops (Denticyclops) birmanus Lindberg, 1943 (source of synonymy)
Eucyclops breviramatus Löffler, 1963 represented as Eucyclops (Breviramocyclops) breviramatus Löffler, 1963 (status source)
Eucyclops bryophilus Lindberg, 1950 represented as Eucyclops (Subterrocyclops) bryophilus Llindberg, 1950 (source of synonymy)
Eucyclops chilensis Löffler, 1961 (additional source)
Eucyclops ciliatus (Sars G.O., 1909) represented as Eucyclops (Ciliocyclops) ciliatus (Sars G.O., 1909) (new combination reference)
Eucyclops crassispinosus Kiefer, 1932 represented as Eucyclops (Sarsicyclops) crassispinosus Kiefer, 1932 (source of synonymy)
Eucyclops delachauxi (Kiefer, 1925) represented as Eucyclops (Subterrocyclops) delachauxi (Kiefer, 1925) (source of synonymy)
Eucyclops delongi Alekseev, Abramova & Chaban, 2019 represented as Eucyclops (Speratocyclops) delongi Alekseev, 2019 (new combination reference)
Eucyclops dubius (Sars G.O., 1909) represented as Eucyclops (Macrurocyclops) dubius (Sars G.O., 1909) (source of synonymy)
Eucyclops dumonti Alekseev, 2000 represented as Eucyclops (Speratocyclops) dumonti Alekseev, 2000 (new combination reference)
Eucyclops echinatus (Kiefer, 1926) represented as Eucyclops (Mrazekicyclops) echinatus (Kiefer, 1926) (source of synonymy)
Eucyclops edytae Tang & Knott, 2009 (new combination reference)
Eucyclops euacanthus euacanthus (Sars G.O., 1909) represented as Eucyclops (Denticyclops) euacanthus (Sars G.O., 1909) (source of synonymy)
Eucyclops euacanthus lanceolata Dussart, 1974 represented as Eucyclops (Denticyclops) euacanthus lanceolatus Dussart, 1974 (source of synonymy)
Eucyclops fragilis (Kiefer, 1926) represented as Eucyclops (Subterrocyclops) fragilis (Kiefer, 1926) (source of synonymy)
Eucyclops glaber Kiefer, 1935 represented as Eucyclops (Subterrocyclops) glaber Kiefer, 1935 (source of synonymy)
Eucyclops inarmatus Kiefer, 1932 represented as Eucyclops (Mrazekicyclops) inarmatus Kiefer, 1932 (new combination reference)
Eucyclops laevimargo (Sars G.O., 1909) represented as Eucyclops laevimargo laevimargo (Sars G.O., 1909) represented as Eucyclops (Macrurocyclops) laevimargo (G.O. Sars, 1909) (source of synonymy)
Eucyclops laevimargo laevimargo (Sars G.O., 1909) represented as Eucyclops (Macrurocyclops) laevimargo (G.O. Sars, 1909) (source of synonymy)
Eucyclops leschermoutouae Alekseev & Defaye, 2004 represented as Eucyclops (Speratocyclops) leschermoutouae Alekseev & Defaye, 2004 (new combination reference)
Eucyclops longispinosus Pesce & Galassi, 1987 represented as Eucyclops (Denticyclops) longispinosus Pesce & Galassi, 1987 (source of synonymy)
Eucyclops macrurus macrurus (Sars G.O., 1863) represented as Eucyclops (Macrurocyclops) macrurus (Sars G.O., 1863) (source of synonymy)