Afrocyclops propinquus (Kiefer, 1932) (new combination reference)
Australoeucyclops linderi (Lindberg, 1948) represented as Eucyclops (Subterrocyclops) linderi Lindberg, 1948 (new combination reference)
Cyclops delachauxi Kiefer, 1925 accepted as Eucyclops delachauxi (Kiefer, 1925) represented as Eucyclops (Subterrocyclops) delachauxi (Kiefer, 1925) accepted as Eucyclops (Eucyclops) delachauxi (Kiefer, 1925) (source of synonymy)
Cyclops echinatus Kiefer, 1926 accepted as Eucyclops stuhlmanni echinatus (Kiefer, 1926) represented as Eucyclops echinatus (Kiefer, 1926) represented as Eucyclops (Mrazekicyclops) echinatus (Kiefer, 1926) (source of synonymy)
Cyclops fragilis Kiefer, 1926 accepted as Eucyclops fragilis (Kiefer, 1926) represented as Eucyclops vandouwei (Brehm, 1909) represented as Eucyclops (Eucyclops) vandouwii (Brehm, 1909) (source of synonymy)
Cyclops laevimargo Sars G.O., 1909 accepted as 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)
Cyclops macrurus Sars G.O., 1863 accepted as Eucyclops macrurus (Sars G.O., 1863) represented as Eucyclops macrurus macrurus (Sars G.O., 1863) represented as Eucyclops (Macrurocyclops) macrurus (Sars G.O., 1863) (source of synonymy)
Cyclops macrurus subterranea Graeter, 1907 accepted as Eucyclops subterraneus (Graeter, 1907) represented as Eucyclops subterraneus subterraneus (Graeter, 1907) represented as Eucyclops (Subterrocyclops) subterraneus (Graeter, 1907) (new combination reference)
Cyclops neumani Pesta, 1927 accepted as Eucyclops neumani (Pesta, 1927) represented as Eucyclops neumani neumani (Pesta, 1927) represented as Eucyclops (Eucyclops) neumani (Pesta, 1927) (additional source)
Cyclops rarispinus Sars G.O., 1909 accepted as Eucyclops rarispinus (Sars G.O., 1909) represented as Eucyclops (Ciliocyclops) rarispinus (Sars G.O., 1909) (new combination reference)
Cyclops semiserratus Sars G.O., 1909 represented as Eucyclops semiserratus (Sars G.O., 1909) represented as Eucyclops (Sarsicyclops) semiserratus (Sars, 1909) (source of synonymy)
Cyclops serrulatus speratus Lilljeborg, 1901 accepted 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) represented as Eucyclops (Speratocyclops) speratus speratus (Lilljeborg, 1901) (new combination reference)
Cyclops silvestrii Brian, 1927 accepted as Eucyclops silvestrii (Brian, 1927) represented as Eucyclops (Eucyclops) silvestrii (Brian, 1927) (additional source)
Cyclops stuhlmanni Mrázek, 1898 accepted as Eucyclops stuhlmanni (Mrázek, 1898) represented as Eucyclops stuhlmanni stuhlmanni (Mrázek, 1898) represented as Eucyclops (Mrazekicyclops) stuhlmanni (Mrazek, 1898) represented as Eucyclops (Mrazekicyclops) stuhlmanni stuhlmanni (Mrazek, 1898) (new combination reference)
Cyclops vandouwii Brehm, 1909 accepted as Eucyclops (Eucyclops) vandouwii (Brehm, 1909) (additional source)
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) represented as Eucyclops (Speratocyclops) speratus 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)
Eucyclopinae Kiefer, 1927 (additional source)
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 (Ciliocyclops) neotropicus Kiefer, 1936 (additional source)
Eucyclops (Ciliocyclops) permixtus Kiefer, 1928 represented as Eucyclops (Ciliocyclops) permixtus permixtus Kiefer, 1928 (new combination reference)
Eucyclops (Ciliocyclops) rarispinus (Sars G.O., 1909) (additional source)
Eucyclops (Ciliocyclops) subciliatus Dussart, 1984 (new combination reference)
Eucyclops (Denticyclops) Alekseev, 2019 (original description)
Eucyclops (Denticyclops) birmanus Lindberg, 1949 (new combination reference)
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 birmanus Lindberg, 1949 (new combination reference)
Eucyclops (Denticyclops) euacanthus cognatus Kiefer, 1929 (basis of record)
Eucyclops (Denticyclops) euacanthus euacanthus (Sars G.O., 1909) (additional source)
Eucyclops (Denticyclops) euacanthus lanceolatus Dussart, 1974 (basis of record)
Eucyclops (Denticyclops) festivus Lindberg, 1955 (additional source)
Eucyclops (Denticyclops) ibleicus Pesce & Galassi, 1987 (basis of record)
Eucyclops (Denticyclops) leptacanthus Kiefer, 1956 (additional source)
Eucyclops (Denticyclops) longispinosus Pesce & Galassi, 1987 (original description)
Eucyclops (Denticyclops) longispinosus Pesce & Galassi, 1987 (additional source)
Eucyclops (Denticyclops) macruroides (Lilljeborg, 1901) (new combination reference)
Eucyclops (Denticyclops) microdenticulatus Lindberg, 1940 (basis of record)
Eucyclops (Denticyclops) neomacruroides Dussart & Fernando, 1990 (new combination reference)
Eucyclops (Denticyclops) pseudoensifer Dussart, 1984 (basis of record)
Eucyclops (Denticyclops) titicacae Kiefer, 1957 (new combination reference)
Eucyclops (Eucyclops) acanthoides (Douwe, 1914) (new combination reference)
Eucyclops (Eucyclops) albuferensis Alekseev, 2008 (additional source)
Eucyclops (Eucyclops) australiensis Morton, 1990 (additional source)
Eucyclops (Eucyclops) neumani (Pesta, 1927) (additional source)
Eucyclops (Eucyclops) parvicornis Harding, 1942 (additional source)
Eucyclops (Eucyclops) pectinifer (Cragin, 1883) represented as Eucyclops (Eucyclops) pectinifer pectinifer (Cragin, 1883) (additional source)
Eucyclops (Eucyclops) pectinifer pectinifer (Cragin, 1883) (additional source)
Eucyclops (Eucyclops) prionophorus Kiefer, 1931 (additional source)
Eucyclops (Eucyclops) procerus Dussart, 1981 (additional source)
Eucyclops (Eucyclops) roseus Ishida, 1997 represented as Eucyclops (Eucyclops) agiloides roseus Ishida, 1997 (new combination reference)
Eucyclops (Eucyclops) ruttneri Kiefer, 1933 represented as Eucyclops (Ciliocyclops) permixtus ruttneri Kiefer, 1933 (source of synonymy)
Eucyclops (Eucyclops) spatulatus Morton, 1990 (additional source)
Eucyclops (Eucyclops) vandouwii (Brehm, 1909) (additional source)
Eucyclops (Isocyclops) caparti Kiefer, 1957 (additional source)
Eucyclops (Macrurocyclops) Alekseev, 2019 (original description)
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) neocaledoniensis Dussart, 1984 (additional source)
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 represented as Eucyclops (Macrurocyclops) miurai Ito Tak., 1952 (new combination reference)
Eucyclops (Mrazekicyclops) stuhlmanni (Mrazek, 1898) represented as Eucyclops (Mrazekicyclops) stuhlmanni stuhlmanni (Mrazek, 1898) (new combination reference)
Eucyclops (Sarsicyclops) Alekseev, 2019 (original description)
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 represented as Eucyclops (Eucyclops) spatharum Harding, 1942 (new combination reference)
Eucyclops (Speratocyclops) Alekseev, 2019 (original description)
Eucyclops (Speratocyclops) arcanus Alekseev, 1990 represented as Eucyclops (Speratocyclops) arcanus arcanus Alekseev, 1990 (new combination reference)
Eucyclops (Speratocyclops) delongi Alekseev, 2019 (additional source)
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) represented as Eucyclops (Speratocyclops) speratus 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 accepted as Eucyclops (Eucyclops) bryophilus Lindberg, 1950 (new combination reference)
Eucyclops (Subterrocyclops) chivahensis Lindberg, 1960 (new combination reference)
Eucyclops (Subterrocyclops) delachauxi (Kiefer, 1925) accepted as Eucyclops (Eucyclops) delachauxi (Kiefer, 1925) (new combination reference)
Eucyclops (Subterrocyclops) elburziensis Lindberg, 1941 (new combination reference)
Eucyclops (Subterrocyclops) fragilis (Kiefer, 1926) accepted as Eucyclops (Eucyclops) vandouwii (Brehm, 1909) (new combination reference)

 Taxonomic remark

 for Eucyclops (Denticyclops) Alekseev, 2019

Denticylops [details]

 Taxonomic remark

 for Eucyclops chilensis Löffler, 1961

Alekseev (2019) gave "1963" as the date for chilensis, and cited a later, 1963 paper of Loffler on Ecuador material ... [details]

 Taxonomic remark

 for Eucyclops chilensis Löffler, 1961

Alekseev (2019) gave "1963" as the date for chilensis, and cited a later, 1963 paper of Loffler on Ecuador material ... [details]

 Taxonomic remark

 for Isocyclops Kiefer, 1957

Alekseev 2019 raised Kiefer's sugenus to genus level [details]