Copepoda taxon details

Eucyclops Claus, 1893

149781  (urn:lsid:marinespecies.org:taxname:149781)

accepted
Genus
Leptocyclops Sars G.O., 1914 · unaccepted (synonym)

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  1. Subgenus Eucyclops (Afrocyclops) Kiefer, 1935
    1. Species Eucyclops (Afrocyclops) doryphorus Kiefer, 1935 accepted as Eucyclops doryphorus Kiefer, 1935 accepted as Afrocyclops doryphorus Kiefer, 1935
  2. Subgenus Eucyclops (Breviramocyclops) Alekseev, 2019
    1. Species Eucyclops (Breviramocyclops) angeli Gutiérrez-Aguirre & Cervantes-Martínez, 2013 In: Gutiérrez-Aguirre, Mercado-Salas & Cervantes-Martínez, 2013
    2. Species Eucyclops (Breviramocyclops) breviramatus Löffler, 1963
    3. Species Eucyclops (Breviramocyclops) edytae Tang & Knott, 2009
    4. Species Eucyclops (Breviramocyclops) puteincola Kiefer, 1981
    5. Species Eucyclops (Breviramocyclops) siolii Herbst, 1962
  3. Subgenus Eucyclops (Ciliocyclops) Alekseev, 2019
    1. Species Eucyclops (Ciliocyclops) ciliatus (Sars G.O., 1909)
    2. Species Eucyclops (Ciliocyclops) neotropicus Kiefer, 1936
    3. Species Eucyclops (Ciliocyclops) rarispinus (Sars G.O., 1909)
    4. Species Eucyclops (Ciliocyclops) subciliatus Dussart, 1984
    5. Species Eucyclops (Ciliocyclops) permixtus Kiefer, 1928 represented as Eucyclops (Ciliocyclops) permixtus permixtus Kiefer, 1928
      1. Subspecies Eucyclops (Ciliocyclops) permixtus permixtus Kiefer, 1928
      2. Subspecies Eucyclops (Ciliocyclops) permixtus ruttneri Kiefer, 1933
  4. Subgenus Eucyclops (Denticyclops) Alekseev, 2019
    1. Species Eucyclops (Denticyclops) alekseevi Mercado-Salas & Suárez-Morales, 2016
    2. Species Eucyclops (Denticyclops) birmanus Lindberg, 1949
    3. Species Eucyclops (Denticyclops) denticulatus (Graeter, 1903)
    4. Species Eucyclops (Denticyclops) euacanthus (Sars G.O., 1909)
      1. Subspecies Eucyclops (Denticyclops) euacanthus aequatorialis Dussart & Fernando, 1985
      2. Subspecies Eucyclops (Denticyclops) euacanthus baylyi Morton, 1990
      3. Subspecies Eucyclops (Denticyclops) euacanthus birmanus Lindberg, 1949
      4. Subspecies Eucyclops (Denticyclops) euacanthus cognatus Kiefer, 1929
      5. Subspecies Eucyclops (Denticyclops) euacanthus euacanthus (Sars G.O., 1909)
      6. Subspecies Eucyclops (Denticyclops) euacanthus lanceolatus Dussart, 1974
    5. Species Eucyclops (Denticyclops) festivus Lindberg, 1955
    6. Species Eucyclops (Denticyclops) ibleicus Pesce & Galassi, 1987
    7. Species Eucyclops (Denticyclops) leptacanthus Kiefer, 1956
    8. Species Eucyclops (Denticyclops) longispinosus Pesce & Galassi, 1987
    9. Species Eucyclops (Denticyclops) macruroides (Lilljeborg, 1901)
    10. Species Eucyclops (Denticyclops) microdenticulatus Lindberg, 1940
    11. Species Eucyclops (Denticyclops) neomacruroides Dussart & Fernando, 1990
    12. Species Eucyclops (Denticyclops) pseudoensifer Dussart, 1984
    13. Species Eucyclops (Denticyclops) taiwanensis Sukhikh & Alekseev, 2015
    14. Species Eucyclops (Denticyclops) titicacae Kiefer, 1957
  5. Subgenus Eucyclops (Eucyclops) Claus, 1863
    1. Species Eucyclops (Eucyclops) acanthoides (Douwe, 1914)
    2. Species Eucyclops (Eucyclops) albuferensis Alekseev, 2008
    3. Species Eucyclops (Eucyclops) australiensis Morton, 1990
    4. Species Eucyclops (Eucyclops) bryophilus Lindberg, 1950
    5. Species Eucyclops (Eucyclops) defectus Lindberg, 1937
    6. Species Eucyclops (Eucyclops) delachauxi (Kiefer, 1925)
    7. Species Eucyclops (Eucyclops) demacedoi Lindberg, 1957
    8. Species Eucyclops (Eucyclops) ensifer Kiefer, 1936
    9. Species Eucyclops (Eucyclops) farsicus Lindberg, 1941
    10. Species Eucyclops (Eucyclops) neumani (Pesta, 1927)
    11. Species Eucyclops (Eucyclops) parvicornis Harding, 1942
    12. Species Eucyclops (Eucyclops) prionophorus Kiefer, 1931
    13. Species Eucyclops (Eucyclops) procerus Dussart, 1981
    14. Species Eucyclops (Eucyclops) romaniensis Alekseev, 2010
    15. Species Eucyclops (Eucyclops) silvestrii (Brian, 1927)
    16. Species Eucyclops (Eucyclops) spatharum Harding, 1942
    17. Species Eucyclops (Eucyclops) spatulatus Morton, 1990
    18. Species Eucyclops (Eucyclops) sublaevis (Sars G.O., 1927)
    19. Species Eucyclops (Eucyclops) torresphilipi Suárez-Morales, 2004
    20. Species Eucyclops (Eucyclops) tziscao Mercado-Salas, 2013 In: Gutiérrez-Aguirre, Mercado-Salas & Cervantes-Martínez, 2013
    21. Species Eucyclops (Eucyclops) vandouwii (Brehm, 1909)
    22. Species Eucyclops (Eucyclops) wixarica Mercado-Salas & Suárez-Morales, 2016
    23. Species Eucyclops (Eucyclops) agiloides (Sars G.O., 1909) represented as Eucyclops (Eucyclops) agiloides agiloides (Sars G.O., 1909)
      1. Subspecies Eucyclops (Eucyclops) agiloides agiloides (Sars G.O., 1909)
      2. Subspecies Eucyclops (Eucyclops) agiloides miracleae Alekseev, 2010
      3. Subspecies Eucyclops (Eucyclops) agiloides pacificus Ishida, 2000
      4. Subspecies Eucyclops (Eucyclops) agiloides roseus Ishida, 1997
      5. Subspecies Eucyclops (Eucyclops) agiloides sarsi Alekseev, 2023
    24. Species Eucyclops (Eucyclops) bondi Kiefer, 1934 represented as Eucyclops (Eucyclops) bondi bondi Kiefer, 1934
      1. Subspecies Eucyclops (Eucyclops) bondi bondi Kiefer, 1934
      2. Subspecies Eucyclops (Eucyclops) bondi conrowae Reid, 1992
    25. Species Eucyclops (Eucyclops) borealis Ishida, 2001 represented as Eucyclops (Eucyclops) borealis borealis Ishida, 2001
      1. Subspecies Eucyclops (Eucyclops) borealis borealis Ishida, 2001
      2. Subspecies Eucyclops (Eucyclops) borealis tsushimensis Ishida, 2001
    26. Species Eucyclops (Eucyclops) chilensis Löffler, 1961 represented as Eucyclops (Eucyclops) chilensis chilensis Löffler, 1961
      1. Subspecies Eucyclops (Eucyclops) chilensis chilensis Löffler, 1961
      2. Subspecies Eucyclops (Eucyclops) chilensis cuatrocienegas Suárez-Morales & Walsh, 2009
    27. Species Eucyclops (Eucyclops) elegans (Herrick, 1884) represented as Eucyclops (Eucyclops) elegans elegans (Herrick, 1884)
      1. Subspecies Eucyclops (Eucyclops) elegans elegans (Herrick, 1884)
      2. Subspecies Eucyclops (Eucyclops) elegans mittmanni Mercado-Salas & Suárez-Morales, 2016
    28. Species Eucyclops (Eucyclops) ishidai Mercado-Salas & Suárez-Morales, 2016 represented as Eucyclops (Eucyclops) pectinifer ishidai Mercado-Salas & Suárez-Morales, 2016
    29. Species Eucyclops (Eucyclops) pectinifer (Cragin, 1883) represented as Eucyclops (Eucyclops) pectinifer pectinifer (Cragin, 1883)
      1. Subspecies Eucyclops (Eucyclops) pectinifer ishidai Mercado-Salas & Suárez-Morales, 2016
      2. Subspecies Eucyclops (Eucyclops) pectinifer pectinifer (Cragin, 1883)
    30. Species Eucyclops (Eucyclops) roseus Ishida, 1997 represented as Eucyclops (Eucyclops) agiloides roseus Ishida, 1997
    31. Species Eucyclops (Eucyclops) ruttneri Kiefer, 1933 represented as Eucyclops (Ciliocyclops) permixtus ruttneri Kiefer, 1933
    32. Species Eucyclops (Eucyclops) serrulatus (Fischer, 1851) represented as Eucyclops (Eucyclops) serrulatus serrulatus (Fischer, 1851)
      1. Subspecies Eucyclops (Eucyclops) serrulatus hadjebensis (Kiefer, 1926)
      2. Subspecies Eucyclops (Eucyclops) serrulatus serrulatus (Fischer, 1851)
      3. Subspecies Eucyclops (Eucyclops) serrulatus turcomanus Lindberg, 1959
  6. Subgenus Eucyclops (Macrurocyclops) Alekseev, 2019
    1. Species Eucyclops (Macrurocyclops) angustus (G.O. Sars, 1909)
    2. Species Eucyclops (Macrurocyclops) dubius (Sars G.O., 1909)
    3. Species Eucyclops (Macrurocyclops) laevimargo (G.O. Sars, 1909)
    4. Species Eucyclops (Macrurocyclops) macrurus (Sars G.O., 1863)
    5. Species Eucyclops (Macrurocyclops) madagascariensis (Kiefer, 1926)
    6. Species Eucyclops (Macrurocyclops) maritimus Alekseev & Monchenko, 2011
    7. Species Eucyclops (Macrurocyclops) miurai Ito Tak., 1952
    8. Species Eucyclops (Macrurocyclops) neocaledoniensis Dussart, 1984
    9. Species Eucyclops (Macrurocyclops) orthostylis Lindberg, 1952
    10. Species Eucyclops (Macrurocyclops) persistens Monchenko, 1978
      1. Subspecies Eucyclops (Macrurocyclops) persistens tauricus Monchenko & Sopova, 1984
  7. Subgenus Eucyclops (Mrazekicyclops) Alekseev, 2019
    1. Species Eucyclops (Mrazekicyclops) echinatus (Kiefer, 1926)
    2. Species Eucyclops (Mrazekicyclops) inarmatus Kiefer, 1932
    3. Species Eucyclops (Mrazekicyclops) tepidus Kiefer, 1952
    4. Species Eucyclops (Mrazekicyclops) miurai Ito Tak., 1952 represented as Eucyclops (Macrurocyclops) miurai Ito Tak., 1952
    5. Species Eucyclops (Mrazekicyclops) stuhlmanni (Mrazek, 1898) represented as Eucyclops (Mrazekicyclops) stuhlmanni stuhlmanni (Mrazek, 1898)
      1. Subspecies Eucyclops (Mrazekicyclops) stuhlmanni minor Kiefer, 1952
      2. Subspecies Eucyclops (Mrazekicyclops) stuhlmanni stuhlmanni (Mrazek, 1898)
  8. Subgenus Eucyclops (Sarsicyclops) Alekseev, 2019
    1. Species Eucyclops (Sarsicyclops) crassispinosus Kiefer, 1932
    2. Species Eucyclops (Sarsicyclops) nichollsi Brehm, 1950
    3. Species Eucyclops (Sarsicyclops) porrectus Kiefer, 1932
    4. Species Eucyclops (Sarsicyclops) semiserratus (Sars, 1909)
    5. Species Eucyclops (Sarsicyclops) thienemanni Kiefer, 1930
    6. Species Eucyclops (Sarsicyclops) neocaledoniensis Dussart, 1984 represented as Eucyclops (Macrurocyclops) neocaledoniensis Dussart, 1984
    7. Species Eucyclops (Sarsicyclops) spatharum Harding, 1942 represented as Eucyclops (Eucyclops) spatharum Harding, 1942
  9. Subgenus Eucyclops (Speratocyclops) Alekseev, 2019
    1. Species Eucyclops (Speratocyclops) biwensis Ishida, 1998
      1. Subspecies Eucyclops (Speratocyclops) biwensis biwensis Ishida, 1998
      2. Subspecies Eucyclops (Speratocyclops) biwensis ohtakai shida, 2000
    2. Species Eucyclops (Speratocyclops) delongi Alekseev, 2019
    3. Species Eucyclops (Speratocyclops) dumonti Alekseev, 2000
    4. Species Eucyclops (Speratocyclops) leschermoutouae Alekseev & Defaye, 2004
    5. Species Eucyclops (Speratocyclops) productus Kiefer, 1936
    6. Species Eucyclops (Speratocyclops) arcanus Alekseev, 1990 represented as Eucyclops (Speratocyclops) arcanus arcanus Alekseev, 1990
      1. Subspecies Eucyclops (Speratocyclops) arcanus arcanus Alekseev, 1990
      2. Subspecies Eucyclops (Speratocyclops) arcanus arcticus Alekseev, 2022
    7. Species Eucyclops (Speratocyclops) speratus (Lilljeborg, 1901) represented as Eucyclops (Speratocyclops) speratus speratus (Lilljeborg, 1901)
      1. Subspecies Eucyclops (Speratocyclops) speratus azorensis Defaye & Dussart, 1991
      2. Subspecies Eucyclops (Speratocyclops) speratus speratus (Lilljeborg, 1901)
    8. Species Eucyclops (Speratocyclops) troposperatus Alekseev & Yusoff, 2013 represented as Eucyclops troposperatus Alekseev & Yusoff, in: Alekseev, Haffner, Vaillant & Yusoff, 2013
  10. Subgenus Eucyclops (Subterrocyclops) Alekseev, 2019
    1. Species Eucyclops (Subterrocyclops) chivahensis Lindberg, 1960
    2. Species Eucyclops (Subterrocyclops) elburziensis Lindberg, 1941
    3. Species Eucyclops (Subterrocyclops) glaber Kiefer, 1935
    4. Species Eucyclops (Subterrocyclops) graeteri (Chappuis, 1927)
    5. Species Eucyclops (Subterrocyclops) intermedius Damian, 1955
    6. Species Eucyclops (Subterrocyclops) linderi Lindberg, 1948
    7. Species Eucyclops (Subterrocyclops) maritimus Alekseev & Monchenko, 2011
    8. Species Eucyclops (Subterrocyclops) nagasakai Uéno, 1934
    9. Species Eucyclops (Subterrocyclops) naphaeus Petkovski, 1972
    10. Species Eucyclops (Subterrocyclops) nudus Kiefer, 1935
    11. Species Eucyclops (Subterrocyclops) subterraneus (Graeter, 1907)
    12. Species Eucyclops (Subterrocyclops) thienemanni Kiefer, 1930
    13. Species Eucyclops (Subterrocyclops) bryophilus Llindberg, 1950 accepted as Eucyclops (Eucyclops) bryophilus Lindberg, 1950
    14. Species Eucyclops (Subterrocyclops) delachauxi (Kiefer, 1925) accepted as Eucyclops (Eucyclops) delachauxi (Kiefer, 1925)
    15. Species Eucyclops (Subterrocyclops) fragilis (Kiefer, 1926) accepted as Eucyclops (Eucyclops) vandouwii (Brehm, 1909)
    16. Species Eucyclops (Subterrocyclops) propinquus Kiefer, 1932 accepted as Afrocyclops propinquus (Kiefer, 1932)
    17. Species Eucyclops (Subterrocyclops) torresphilipi Suárez-Morales, 2004 represented as Eucyclops (Eucyclops) torresphilipi Suárez-Morales, 2004
  11. Species Eucyclops angeli Gutiérrez-Aguirre & Cervantes-Martínez, 2013 In: Gutiérrez-Aguirre, Mercado-Salas & Cervantes-Martínez, 2013
  12. Species Eucyclops bathanalicola Boxshall & Strong, 2006
  13. Species Eucyclops biwensis Ishida, 1998
  14. Species Eucyclops caparti Lindberg, 1951
    1. Species Eucyclops cuatrocienegas Suárez-Morales & Walsh, 2009
    2. Species Eucyclops defayeae Mercado-Salas & Suárez-Morales, 2016
    3. Species Eucyclops edytae Tang & Knott, 2009
    4. Species Eucyclops elburziensis Lindberg, 1955
    5. Species Eucyclops neotropicus Kiefer, 1936
    6. Species Eucyclops nudus Kiefer, 1935
    7. Species Eucyclops ohtakai Ishida, 2000
    8. Species Eucyclops pacificus Ishida, 2000
    9. Species Eucyclops paucidenticulatus Lindberg, 1951
    10. Species Eucyclops permixtus Kiefer, 1929
    11. Species Eucyclops prionophorus Kiefer, 1931
    12. Species Eucyclops procerus Dussart, 1981
    13. Species Eucyclops romaniensis Alekseev, 2010
    14. Species Eucyclops sibiricus Novikov, Sharafutdinova, Abramova, Mayor & Chertoprud, 2025
    15. Species Eucyclops troposperatus Alekseev & Yusoff, in: Alekseev, Haffner, Vaillant & Yusoff, 2013
    16. Species Eucyclops viridis (Henry, 1919)
    17. Subgenus Eucyclops (Tropocyclops) Kiefer, 1927 accepted as Tropocyclops Kiefer, 1927
      1. Species Eucyclops (Tropocyclops) candidiusi Harada, 1931
      2. Species Eucyclops (Tropocyclops) prasinus Fischer, 1860
        1. Subspecies Eucyclops (Tropocyclops) prasinus candidiusi Harada, 1931 accepted as Tropocyclops prasinus candidiusi (Harada, 1931) accepted as Tropocyclops candidiusi (Harada, 1931)
      3. Species Eucyclops (Tropocyclops) nigroviridis Harada, 1931 represented as Tropocyclops nigroviridis (Harada, 1931)
      4. Species Eucyclops (Tropocyclops) schubarti Kiefer, 1935 represented as Tropocyclops schubarti (Kiefer, 1935) represented as Tropocyclops schubarti schubarti (Kiefer, 1935)
    18. Species Eucyclops abdelkader Dumont & Pensaert, 1979 (unaccepted > interim unpublished, unpublished thesis, probably Eucyclops (Eucyclops) serrulatus)
    19. Species Eucyclops affinis (Sars G.O., 1863) accepted as Paracyclops affinis (Sars G.O., 1863)
    20. Species Eucyclops agilis (Koch, 1838) accepted as Eucyclops agilis agilis (Koch, 1838) (unaccepted > nomen nudum, See Alekseev 2024:197)
      1. Subspecies Eucyclops agilis montanus (Brady, 1878)
      2. Subspecies Eucyclops agilis agilis (Koch, 1838) (unaccepted > nomen nudum)
      3. Subspecies Eucyclops agilis 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)
    21. Species Eucyclops alter Kiefer, 1935 accepted as Afrocyclops alter Kiefer, 1935
    22. Species Eucyclops alticola Kiefer, 1957 accepted as Eucyclops (Denticyclops) titicacae Kiefer, 1957
    23. Species Eucyclops ariguanabensis Brehm, 1949 (unaccepted > nomen nudum, (See Alekseev 2024:197))
    24. Species Eucyclops assymmetricus Dumont & Pensaert, 1979 (unaccepted > interim unpublished, unpublished thesis, probably Eucyclops (Eucyclops) serrulatus)
    25. Species Eucyclops brevifurcatus (Grandori, 1925) (unaccepted > nomen nudum)
    26. Species Eucyclops candidiusi Harada, 1931 accepted as Tropocyclops prasinus candidiusi (Harada, 1931) accepted as Tropocyclops candidiusi (Harada, 1931)
    27. Species Eucyclops confinis Kiefer, 1930 accepted as Tropocyclops confinis (Kiefer, 1930) represented as Tropocyclops confinis confinis (Kiefer, 1930)
      1. Subspecies Eucyclops confinis frequens Kiefer, 1931
    28. Species Eucyclops congolensis Lindberg, 1951 accepted as Eucyclops (Macrurocyclops) madagascariensis (Kiefer, 1926)
    29. Species Eucyclops coronatus (Claus, 1857) accepted as Macrocyclops coronatus (Claus, 1857) accepted as Cyclops signatus Koch, 1838 accepted as Pachycyclops signatus (Koch, 1838) accepted as Macrocyclops signatus (Koch, 1838)
    30. Species Eucyclops curticornis Kiefer, 1932 accepted as Afrocyclops curticornis (Kiefer, 1932)
    31. Species Eucyclops davidi Chappuis, 1922 accepted as Microcyclops davidi (Chappuis, 1922) represented as Microcyclops (Microcyclops) davidi (Chappuis, 1922) represented as Microcyclops (Microcyclops) davidi davidi (Chappuis, 1922)
    32. Species Eucyclops doryphorus Kiefer, 1935 accepted as Afrocyclops doryphorus Kiefer, 1935
    33. Species Eucyclops estherae Mercado-Salas & Suárez-Morales, 2016 accepted as Eucyclops festivus Lindberg, 1955 represented as Eucyclops (Denticyclops) festivus Lindberg, 1955
    34. Species Eucyclops extensus Kiefer, 1931 accepted as Tropocyclops extensus Kiefer, 1931 represented as Tropocyclops extensus extensus Kiefer, 1931
      1. Subspecies Eucyclops extensus longispina Kiefer, 1931
    35. Species Eucyclops gibsoni (Brady, 1904) accepted as Afrocyclops gibsoni gibsoni (Brady, 1904)
    36. Species Eucyclops indicus Kiefer, 1927 accepted as Tropocyclops indicus (Kiefer, 1927)
    37. Species Eucyclops lanceolatus Kiefer, 1935 accepted as Afrocyclops lanceolatus Kiefer, 1935
    38. Species Eucyclops lilljeborgi (Sars G.O., 1914) accepted as Eucyclops (Denticyclops) denticulatus (Graeter, 1903)
    39. Species Eucyclops linderi Lindberg, 1948 accepted as Paracyclops linderi (Lindberg, 1948) represented as Eucyclops (Subterrocyclops) linderi Lindberg, 1948
    40. Species Eucyclops miser Brehm, 1953 accepted as Tropocyclops miser (Brehm, 1953)
    41. Species Eucyclops multicolor Lindberg, 1935 accepted as Tropocyclops multicolor (Lindberg, 1935)
    42. Species Eucyclops nigroviridis Harada, 1931 accepted as Eucyclops (Tropocyclops) nigroviridis Harada, 1931 represented as Tropocyclops nigroviridis (Harada, 1931)
    43. Species Eucyclops nubicus (Chappuis, 1922) accepted as Afrocyclops nubicus (Chappuis, 1922)
    44. Species Eucyclops parvus Kiefer, 1931 accepted as Tropocyclops parvus Kiefer, 1931
    45. Species Eucyclops pentagonus (Vosseler, 1886) accepted as Tropocyclops prasinus (Fischer, 1860) represented as Tropocyclops prasinus prasinus (Fischer, 1860)
    46. Species Eucyclops rahmi (Lindberg, 1957) accepted as Ectocyclops rahmi Lindberg, 1957
    47. Species Eucyclops schubarti Kiefer, 1935 accepted as Eucyclops (Tropocyclops) schubarti Kiefer, 1935 represented as Tropocyclops schubarti (Kiefer, 1935) represented as Tropocyclops schubarti schubarti (Kiefer, 1935)
    48. Species Eucyclops semidenticulatus Lindberg, 1940 accepted as Eucyclops (Denticyclops) euacanthus euacanthus (Sars G.O., 1909)
    49. Species Eucyclops solitarius Herbst, 1959 accepted as Eucyclops (Eucyclops) elegans elegans (Herrick, 1884)
    50. Species Eucyclops tenellus (Sars G.O., 1909) accepted as Tropocyclops tenellus (Sars G.O., 1909)
    51. Species Eucyclops teras (Graeter, 1907) accepted as Stygocyclops teras (Graeter, 1907)
    52. Species Eucyclops varicoides (Brady, 1907) accepted as Tropocyclops varicoides (Brady, 1907)
    53. Subgenus Eucyclops (Isocyclops) Kiefer, 1957 represented as Isocyclops Kiefer, 1957
      1. Species Eucyclops (Isocyclops) caparti Kiefer, 1957
    54. Species Eucyclops acanthoides (Douwe, 1914) represented as Eucyclops (Eucyclops) acanthoides (Douwe, 1914)
    55. Species Eucyclops agiloides (Sars G.O., 1909) represented as Eucyclops (Eucyclops) agiloides (Sars G.O., 1909) represented as Eucyclops (Eucyclops) agiloides agiloides (Sars G.O., 1909)
      1. Subspecies Eucyclops agiloides agiloides (Sars G.O., 1909)
      2. Subspecies Eucyclops agiloides azorensis Defaye & Dussart, 1991 represented as Eucyclops (Speratocyclops) speratus azorensis Defaye & Dussart, 1991
    56. Species Eucyclops albuferensis Alekseev, 2008 represented as Eucyclops (Eucyclops) albuferensis Alekseev, 2008
    57. Species Eucyclops alekseevi Mercado-Salas & Suárez-Morales, 2016 represented as Eucyclops (Denticyclops) alekseevi Mercado-Salas & Suárez-Morales, 2016
    58. Species Eucyclops angustus (Sars G.O., 1909) represented as Eucyclops (Macrurocyclops) angustus (G.O. Sars, 1909)
    59. Species Eucyclops arcanus Alekseev, 1990 represented as Eucyclops (Speratocyclops) arcanus Alekseev, 1990 represented as Eucyclops (Speratocyclops) arcanus arcanus Alekseev, 1990
    60. Species Eucyclops australiensis Morton, 1990 represented as Eucyclops (Eucyclops) australiensis Morton, 1990
    61. Species Eucyclops baylyi Morton, 1990 represented as Eucyclops (Denticyclops) euacanthus baylyi Morton, 1990
    62. Species Eucyclops birmanus Lindberg, 1949 represented as Eucyclops birmanus birmanus Lindberg, 1949 represented as Eucyclops (Denticyclops) birmanus Lindberg, 1949
      1. Subspecies Eucyclops birmanus aequatorialis Dussart & Fernando, 1985 accepted as Eucyclops (Denticyclops) euacanthus aequatorialis Dussart & Fernando, 1985
      2. Subspecies Eucyclops birmanus birmanus Lindberg, 1949 represented as Eucyclops (Denticyclops) birmanus Lindberg, 1949
    63. Species Eucyclops bondi Kiefer, 1934 represented as Eucyclops bondi bondi Kiefer, 1934 represented as Eucyclops (Eucyclops) bondi Kiefer, 1934 represented as Eucyclops (Eucyclops) bondi bondi Kiefer, 1934
      1. Subspecies Eucyclops bondi bondi Kiefer, 1934 represented as Eucyclops (Eucyclops) bondi Kiefer, 1934 represented as Eucyclops (Eucyclops) bondi bondi Kiefer, 1934
      2. Subspecies Eucyclops bondi conrowae Reid, 1992 represented as Eucyclops (Eucyclops) bondi conrowae Reid, 1992
    64. Species Eucyclops borealis Ishida, 2001 represented as Eucyclops borealis borealis Ishida, 2001 represented as Eucyclops (Eucyclops) borealis Ishida, 2001 represented as Eucyclops (Eucyclops) borealis borealis Ishida, 2001
      1. Subspecies Eucyclops borealis borealis Ishida, 2001 represented as Eucyclops (Eucyclops) borealis Ishida, 2001 represented as Eucyclops (Eucyclops) borealis borealis Ishida, 2001
      2. Subspecies Eucyclops borealis tsushimensis Ishida, 2001 represented as Eucyclops (Eucyclops) borealis tsushimensis Ishida, 2001
    65. Species Eucyclops breviramatus Löffler, 1963 represented as Eucyclops (Breviramocyclops) breviramatus Löffler, 1963
    66. Species Eucyclops bryophilus Lindberg, 1950 represented as Eucyclops (Eucyclops) bryophilus Lindberg, 1950
    67. Species Eucyclops chihuahuensis Suárez-Morales & Walsh, 2009 represented as Eucyclops (Eucyclops) pectinifer pectinifer (Cragin, 1883)
    68. Species Eucyclops chilensis Löffler, 1961 represented as Eucyclops (Eucyclops) chilensis Löffler, 1961 represented as Eucyclops (Eucyclops) chilensis chilensis Löffler, 1961
      1. Subspecies Eucyclops chilensis cuatrocienegas Suárez-Morales & Walsh, 2009
    69. Species Eucyclops chivahensis Lindberg, 1960 represented as Eucyclops (Subterrocyclops) chivahensis Lindberg, 1960
    70. Species Eucyclops ciliatus (Sars G.O., 1909) represented as Eucyclops (Ciliocyclops) ciliatus (Sars G.O., 1909)
    71. Species Eucyclops cognatus Kiefer, 1929 represented as Eucyclops euacanthus cognatus Kiefer, 1929 represented as Eucyclops (Denticyclops) euacanthus cognatus Kiefer, 1929
    72. Species Eucyclops conrowae Reid, 1992 represented as Eucyclops bondi conrowae Reid, 1992 represented as Eucyclops (Eucyclops) bondi conrowae Reid, 1992
    73. Species Eucyclops crassispinosus Kiefer, 1932 represented as Eucyclops (Sarsicyclops) crassispinosus Kiefer, 1932
    74. Species Eucyclops defectus Lindberg, 1937 represented as Eucyclops (Eucyclops) defectus Lindberg, 1937
    75. Species Eucyclops delachauxi (Kiefer, 1925) represented as Eucyclops (Subterrocyclops) delachauxi (Kiefer, 1925) accepted as Eucyclops (Eucyclops) delachauxi (Kiefer, 1925)
    76. Species Eucyclops delongi Alekseev, Abramova & Chaban, 2019 represented as Eucyclops (Speratocyclops) delongi Alekseev, 2019
    77. Species Eucyclops demacedoi Lindberg, 1957 represented as Eucyclops (Eucyclops) demacedoi Lindberg, 1957
    78. Species Eucyclops denticulatus (Graeter, 1903) represented as Eucyclops macruroides denticulatus (Graeter, 1903) represented as Eucyclops (Denticyclops) denticulatus (Graeter, 1903)
    79. Species Eucyclops dubius (Sars G.O., 1909) represented as Eucyclops (Macrurocyclops) dubius (Sars G.O., 1909)
    80. Species Eucyclops dumonti Alekseev, 2000 represented as Eucyclops (Speratocyclops) dumonti Alekseev, 2000
    81. Species Eucyclops echinatus (Kiefer, 1926) represented as Eucyclops (Mrazekicyclops) echinatus (Kiefer, 1926)
    82. Species Eucyclops elegans (Herrick, 1884) represented as Eucyclops (Eucyclops) elegans (Herrick, 1884) represented as Eucyclops (Eucyclops) elegans elegans (Herrick, 1884)
    83. Species Eucyclops ensifer Kiefer, 1936 represented as Eucyclops (Eucyclops) ensifer Kiefer, 1936
    84. Species Eucyclops euacanthus (Sars G.O., 1909) represented as Eucyclops (Denticyclops) euacanthus cognatus Kiefer, 1929
      1. Subspecies Eucyclops euacanthus cognatus Kiefer, 1929 represented as Eucyclops (Denticyclops) euacanthus cognatus Kiefer, 1929
      2. Subspecies Eucyclops euacanthus euacanthus (Sars G.O., 1909) represented as Eucyclops (Denticyclops) euacanthus (Sars G.O., 1909)
      3. Subspecies Eucyclops euacanthus lanceolata Dussart, 1974 represented as Eucyclops (Denticyclops) euacanthus lanceolatus Dussart, 1974
      4. Subspecies Eucyclops euacanthus simplex Lindberg, 1952 represented as Eucyclops (Denticyclops) euacanthus euacanthus (Sars G.O., 1909)
    85. Species Eucyclops farsicus Lindberg, 1941 represented as Eucyclops (Eucyclops) farsicus Lindberg, 1941
    86. Species Eucyclops festivus Lindberg, 1955 represented as Eucyclops (Denticyclops) festivus Lindberg, 1955
    87. Species Eucyclops fragilis (Kiefer, 1926) represented as Eucyclops vandouwei (Brehm, 1909) represented as Eucyclops (Eucyclops) vandouwii (Brehm, 1909)
    88. Species Eucyclops glaber Kiefer, 1935 represented as Eucyclops (Subterrocyclops) glaber Kiefer, 1935
    89. Species Eucyclops graeteri (Chappuis, 1927) represented as Eucyclops (Subterrocyclops) graeteri (Chappuis, 1927)
    90. Species Eucyclops hadjebensis (Kiefer, 1926) represented as Eucyclops serrulatus hadjebensis (Kiefer, 1926) represented as Eucyclops (Eucyclops) serrulatus hadjebensis (Kiefer, 1926)
    91. Species Eucyclops ibleicus Pesce & Galassi, 1987 represented as Eucyclops (Denticyclops) ibleicus Pesce & Galassi, 1987
    92. Species Eucyclops inarmatus Kiefer, 1932 represented as Eucyclops (Mrazekicyclops) inarmatus Kiefer, 1932
    93. Species Eucyclops ishidai Mercado-Salas & Suárez-Morales, 2016 represented as Eucyclops (Eucyclops) ishidai Mercado-Salas & Suárez-Morales, 2016 represented as Eucyclops (Eucyclops) pectinifer ishidai Mercado-Salas & Suárez-Morales, 2016
    94. Species Eucyclops laevimargo (Sars G.O., 1909) represented as Eucyclops laevimargo laevimargo (Sars G.O., 1909) represented as Eucyclops (Macrurocyclops) laevimargo (G.O. Sars, 1909)
      1. Subspecies Eucyclops laevimargo laevimargo (Sars G.O., 1909) represented as Eucyclops (Macrurocyclops) laevimargo (G.O. Sars, 1909)
      2. Subspecies Eucyclops laevimargo madagascariensis (Kiefer, 1926) represented as Eucyclops madagascariensis (Kiefer, 1926) represented as Eucyclops (Macrurocyclops) madagascariensis (Kiefer, 1926)
    95. Species Eucyclops leptacanthus Kiefer, 1956 represented as Eucyclops (Denticyclops) leptacanthus Kiefer, 1956
    96. Species Eucyclops leschermoutouae Alekseev & Defaye, 2004 represented as Eucyclops (Speratocyclops) leschermoutouae Alekseev & Defaye, 2004
    97. Species Eucyclops longispinosus Pesce & Galassi, 1987 represented as Eucyclops (Denticyclops) longispinosus Pesce & Galassi, 1987
    98. Species Eucyclops macruroides (Lilljeborg, 1901) represented as Eucyclops macruroides macruroides (Lilljeborg, 1901) represented as Eucyclops (Denticyclops) macruroides (Lilljeborg, 1901)
      1. Subspecies Eucyclops macruroides baicalensis Mazepova, 1978 accepted as Eucyclops (Macrurocyclops) macrurus (Sars G.O., 1863)
      2. Subspecies Eucyclops macruroides denticulatus (Graeter, 1903) represented as Eucyclops (Denticyclops) denticulatus (Graeter, 1903)
      3. Subspecies Eucyclops macruroides macruroides (Lilljeborg, 1901) represented as Eucyclops (Denticyclops) macruroides (Lilljeborg, 1901)
    99. Species Eucyclops macrurus (Sars G.O., 1863) represented as Eucyclops macrurus macrurus (Sars G.O., 1863) represented as Eucyclops (Macrurocyclops) macrurus (Sars G.O., 1863)
      1. Subspecies Eucyclops macrurus baikalocorrepus Mazepova, 1955
      2. Subspecies Eucyclops macrurus caucasicus Schiklejew, 1931
      3. Subspecies Eucyclops macrurus subterranea (Graeter, 1907)
      4. Subspecies Eucyclops macrurus intermedius Damian, 1955 accepted as Eucyclops subterraneus (Graeter, 1907) represented as Eucyclops subterraneus subterraneus (Graeter, 1907) represented as Eucyclops (Subterrocyclops) subterraneus (Graeter, 1907)
      5. Subspecies Eucyclops macrurus macrurus (Sars G.O., 1863) represented as Eucyclops (Macrurocyclops) macrurus (Sars G.O., 1863)
    100. Species Eucyclops madagascariensis (Kiefer, 1926) represented as Eucyclops (Macrurocyclops) madagascariensis (Kiefer, 1926)
    101. Species Eucyclops microdenticulatus Lindberg, 1939 represented as Eucyclops (Denticyclops) microdenticulatus Lindberg, 1940
    102. Species Eucyclops miracleae Alekseev, 2010 represented as Eucyclops (Eucyclops) agiloides miracleae Alekseev, 2010
    103. Species Eucyclops mittmanni Mercado-Salas & Suárez-Morales, 2016 represented as Eucyclops (Eucyclops) elegans mittmanni Mercado-Salas & Suárez-Morales, 2016
    104. Species Eucyclops miurai Ito Tak., 1952 represented as Eucyclops (Mrazekicyclops) miurai Ito Tak., 1952 represented as Eucyclops (Macrurocyclops) miurai Ito Tak., 1952
    105. Species Eucyclops nagasakai Uéno, 1934 represented as Eucyclops (Subterrocyclops) nagasakai Uéno, 1934
    106. Species Eucyclops neocaledoniensis Dussart, 1984 represented as Eucyclops (Sarsicyclops) neocaledoniensis Dussart, 1984 represented as Eucyclops (Macrurocyclops) neocaledoniensis Dussart, 1984
    107. Species Eucyclops neomacruroides Dussart & Fernando, 1990 represented as Eucyclops (Denticyclops) neomacruroides Dussart & Fernando, 1990
    108. Species Eucyclops neumani (Pesta, 1927) represented as Eucyclops (Eucyclops) neumani (Pesta, 1927)
      1. Subspecies Eucyclops neumani neumani (Pesta, 1927) represented as Eucyclops (Eucyclops) neumani (Pesta, 1927)
      2. Subspecies Eucyclops neumani titicacae Kiefer, 1957 represented as Eucyclops titicacae Kiefer, 1957 represented as Eucyclops (Denticyclops) titicacae Kiefer, 1957
    109. Species Eucyclops newmani (Pesta, 1927) represented as Eucyclops neumani neumani (Pesta, 1927) represented as Eucyclops (Eucyclops) neumani (Pesta, 1927)
    110. Species Eucyclops nichollsi Brehm, 1950 represented as Eucyclops (Sarsicyclops) nichollsi Brehm, 1950
    111. Species Eucyclops orthostylis Lindberg, 1952 represented as Eucyclops (Macrurocyclops) orthostylis Lindberg, 1952
      1. Subspecies Eucyclops orthostylis maritimus Alekseev & Monchenko, 2011 represented as Eucyclops (Macrurocyclops) maritimus Alekseev & Monchenko, 2011
    112. Species Eucyclops parvicornus Harding, 1942 represented as Eucyclops (Eucyclops) parvicornis Harding, 1942
    113. Species Eucyclops pectinifer (Cragin, 1883) represented as Eucyclops (Eucyclops) pectinifer (Cragin, 1883) represented as Eucyclops (Eucyclops) pectinifer pectinifer (Cragin, 1883)
    114. Species Eucyclops persistens Monchenko, 1978 represented as Eucyclops persistens persistens Monchenko, 1978 represented as Eucyclops (Macrurocyclops) persistens Monchenko, 1978
      1. Subspecies Eucyclops persistens tauricus Monchenko & Sopova, 1984
      2. Subspecies Eucyclops persistens persistens Monchenko, 1978 represented as Eucyclops (Macrurocyclops) persistens Monchenko, 1978
    115. Species Eucyclops porrectus Kiefer, 1932 represented as Eucyclops (Sarsicyclops) porrectus Kiefer, 1932
    116. Species Eucyclops prasinus (Fischer, 1860) represented as Eucyclops prasinus prasinus (Fischer, 1860) accepted as Tropocyclops prasinus prasinus (Fischer, 1860)
      1. Subspecies Eucyclops prasinus jerseyensis Kiefer, 1931
      2. Subspecies Eucyclops prasinus guwana Kiefer, 1931 accepted as Tropocyclops prasinus guawana Kiefer, 1931
      3. Subspecies Eucyclops prasinus meridionalis Kiefer, 1931 accepted as Tropocyclops prasinus meridionalis Kiefer, 1931
      4. Subspecies Eucyclops prasinus prasinus (Fischer, 1860) accepted as Tropocyclops prasinus prasinus (Fischer, 1860)
    117. Species Eucyclops productus Kiefer, 1936 represented as Eucyclops (Speratocyclops) productus Kiefer, 1936
    118. Species Eucyclops propinquus Kiefer, 1932 represented as Eucyclops (Subterrocyclops) propinquus Kiefer, 1932 accepted as Afrocyclops propinquus (Kiefer, 1932)
    119. Species Eucyclops pseudoensifer Dussart, 1984 represented as Eucyclops (Denticyclops) pseudoensifer Dussart, 1984
    120. Species Eucyclops puteincola Kiefer, 1981 represented as Eucyclops (Breviramocyclops) puteincola Kiefer, 1981
    121. Species Eucyclops rarispinus (Sars G.O., 1909) represented as Eucyclops (Ciliocyclops) rarispinus (Sars G.O., 1909)
    122. Species Eucyclops remanei (Herbst, 1952) represented as Neocyclops remanei remanei (Herbst, 1952) accepted as Neocyclops remanei (Herbst, 1952)
      1. Subspecies Eucyclops remanei remanei (Herbst, 1952) accepted as Neocyclops remanei remanei (Herbst, 1952) accepted as Neocyclops remanei (Herbst, 1952)
      2. Subspecies Eucyclops remanei vicinus (Herbst, 1955) accepted as Neocyclops vicinus (Herbst, 1955)
    123. Species Eucyclops roseus Ishida, 1997 represented as Eucyclops (Eucyclops) roseus Ishida, 1997 represented as Eucyclops (Eucyclops) agiloides roseus Ishida, 1997
    124. Species Eucyclops ruttneri Kiefer, 1933 represented as Eucyclops ruttneri ruttneri Kiefer, 1933
      1. Subspecies Eucyclops ruttneri ruttneri Kiefer, 1933
      2. Subspecies Eucyclops ruttneri elburziensis Lindberg, 1941 represented as Eucyclops (Subterrocyclops) elburziensis Lindberg, 1941
    125. Species Eucyclops semiserratus (Sars G.O., 1909) represented as Eucyclops (Sarsicyclops) semiserratus (Sars, 1909)
    126. Species Eucyclops serrulatus (Fischer, 1851) represented as Eucyclops serrulatus serrulatus (Fischer, 1851) represented as Eucyclops (Eucyclops) serrulatus (Fischer, 1851) represented as Eucyclops (Eucyclops) serrulatus serrulatus (Fischer, 1851)
      1. Subspecies Eucyclops serrulatus agilis Yeatman, 1943
      2. Subspecies Eucyclops serrulatus brevicaudata Sovinsky, 1888
      3. Subspecies Eucyclops serrulatus mihi Dussart, Graf & Husson, 1966
      4. Subspecies Eucyclops serrulatus proximus (Lilljeborg, 1901)
      5. Subspecies Eucyclops serrulatus suecicus Lindberg, 1950
      6. Subspecies Eucyclops serrulatus tropicalis Dussart & Fernando, 1985
      7. Subspecies Eucyclops serrulatus baicalocorrepus Mazepova, 1955 accepted as Eucyclops (Macrurocyclops) macrurus (Sars G.O., 1863) ((See Alekseev 2024:197))
      8. Subspecies Eucyclops serrulatus defectus Lindberg, 1937 accepted as Eucyclops (Eucyclops) defectus Lindberg, 1937
      9. Subspecies Eucyclops serrulatus denticulata (Graeter, 1903) accepted as Eucyclops denticulatus (Graeter, 1903) represented as Eucyclops macruroides denticulatus (Graeter, 1903) represented as Eucyclops (Denticyclops) denticulatus (Graeter, 1903)
      10. Subspecies Eucyclops serrulatus extensus Hsiao, 1950 accepted as Eucyclops (Eucyclops) agiloides roseus Ishida, 1997
      11. Subspecies Eucyclops serrulatus chilensis Löffler, 1961 represented as Eucyclops chilensis Löffler, 1961 represented as Eucyclops (Eucyclops) chilensis Löffler, 1961 represented as Eucyclops (Eucyclops) chilensis chilensis Löffler, 1961
      12. Subspecies Eucyclops serrulatus elegans (Herrick, 1884) represented as Eucyclops (Eucyclops) elegans (Herrick, 1884) represented as Eucyclops (Eucyclops) elegans elegans (Herrick, 1884)
      13. Subspecies Eucyclops serrulatus hadjebensis (Kiefer, 1926) represented as Eucyclops (Eucyclops) serrulatus hadjebensis (Kiefer, 1926)
      14. Subspecies Eucyclops serrulatus nagasakai Uéno, 1934 represented as Eucyclops nagasakai Uéno, 1934 represented as Eucyclops (Subterrocyclops) nagasakai Uéno, 1934
      15. Subspecies Eucyclops serrulatus serrulatus (Fischer, 1851) represented as Eucyclops (Eucyclops) serrulatus (Fischer, 1851) represented as Eucyclops (Eucyclops) serrulatus serrulatus (Fischer, 1851)
      16. Subspecies Eucyclops serrulatus speratus (Lilljeborg, 1901) represented as Eucyclops (Speratocyclops) speratus (Lilljeborg, 1901) represented as Eucyclops (Speratocyclops) speratus speratus (Lilljeborg, 1901)
      17. Subspecies Eucyclops serrulatus turcomanus Lindberg, 1959 represented as Eucyclops (Eucyclops) serrulatus turcomanus Lindberg, 1959
    127. Species Eucyclops silvestrii (Brian, 1927) represented as Eucyclops (Eucyclops) silvestrii (Brian, 1927)
    128. Species Eucyclops siolii Herbst, 1962 represented as Eucyclops (Breviramocyclops) siolii Herbst, 1962
    129. Species Eucyclops spatharum Harding, 1942 represented as Eucyclops (Sarsicyclops) spatharum Harding, 1942 represented as Eucyclops (Eucyclops) spatharum Harding, 1942
    130. Species Eucyclops spatulatus Morton, 1990 represented as Eucyclops (Eucyclops) spatulatus Morton, 1990
    131. Species 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)
      1. Subspecies Eucyclops speratus elegans (Herrick, 1884)
      2. Subspecies Eucyclops speratus tasmanica Brehm, 1953 accepted as Eucyclops (Eucyclops) spatulatus Morton, 1990
      3. Subspecies Eucyclops speratus speratus (Lilljeborg, 1901) represented as Eucyclops (Speratocyclops) speratus (Lilljeborg, 1901) represented as Eucyclops (Speratocyclops) speratus speratus (Lilljeborg, 1901)
    132. Species 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)
      1. Subspecies Eucyclops stuhlmanni minor Kiefer, 1952
      2. Subspecies Eucyclops stuhlmanni echinatus (Kiefer, 1926) represented as Eucyclops echinatus (Kiefer, 1926) represented as Eucyclops (Mrazekicyclops) echinatus (Kiefer, 1926)
      3. Subspecies Eucyclops stuhlmanni stuhlmanni (Mrázek, 1898) represented as Eucyclops (Mrazekicyclops) stuhlmanni (Mrazek, 1898) represented as Eucyclops (Mrazekicyclops) stuhlmanni stuhlmanni (Mrazek, 1898)
      4. Subspecies Eucyclops stuhlmanni tepidus Kiefer, 1952 represented as Eucyclops (Mrazekicyclops) tepidus Kiefer, 1952
    133. Species Eucyclops subciliatus Dussart, 1984 represented as Eucyclops (Ciliocyclops) subciliatus Dussart, 1984
    134. Species Eucyclops sublaevis (Sars G.O., 1927) represented as Eucyclops (Eucyclops) sublaevis (Sars G.O., 1927)
    135. Species Eucyclops subterraneus (Graeter, 1907) represented as Eucyclops subterraneus subterraneus (Graeter, 1907) represented as Eucyclops (Subterrocyclops) subterraneus (Graeter, 1907)
      1. Subspecies Eucyclops subterraneus damianae Petkovski, 1971
      2. Subspecies Eucyclops subterraneus intermedius Damian, 1955
      3. Subspecies Eucyclops subterraneus scythicus Plesa, 1989
      4. Subspecies Eucyclops subterraneus naphaeus Petkovski, 1971 represented as Eucyclops (Subterrocyclops) naphaeus Petkovski, 1972
      5. Subspecies Eucyclops subterraneus subterraneus (Graeter, 1907) represented as Eucyclops (Subterrocyclops) subterraneus (Graeter, 1907)
    136. Species Eucyclops taiwanensis Sukhikh & Alekseev, 2015 represented as Eucyclops (Denticyclops) taiwanensis Sukhikh & Alekseev, 2015
    137. Species Eucyclops thienemanni Kiefer, 1930 represented as Eucyclops (Subterrocyclops) thienemanni Kiefer, 1930
    138. Species Eucyclops titicacae Kiefer, 1957 represented as Eucyclops (Denticyclops) titicacae Kiefer, 1957
    139. Species Eucyclops torresphilipi Suárez-Morales, 2004 represented as Eucyclops (Subterrocyclops) torresphilipi Suárez-Morales, 2004 represented as Eucyclops (Eucyclops) torresphilipi Suárez-Morales, 2004
    140. Species Eucyclops tsushimensis Ishida, 2001 represented as Eucyclops borealis tsushimensis Ishida, 2001 represented as Eucyclops (Eucyclops) borealis tsushimensis Ishida, 2001
    141. Species Eucyclops turcomanus Lindberg, 1959 represented as Eucyclops serrulatus turcomanus Lindberg, 1959 represented as Eucyclops (Eucyclops) serrulatus turcomanus Lindberg, 1959
    142. Species Eucyclops tziscao Mercado-Salas, 2013 In: Gutiérrez-Aguirre, Mercado-Salas & Cervantes-Martínez, 2013 represented as Eucyclops (Eucyclops) tziscao Mercado-Salas, 2013 In: Gutiérrez-Aguirre, Mercado-Salas & Cervantes-Martínez, 2013
    143. Species Eucyclops vandouwei (Brehm, 1909) represented as Eucyclops (Eucyclops) vandouwii (Brehm, 1909)
    144. Species Eucyclops wixarica Mercado-Salas & Suárez-Morales, 2016 represented as Eucyclops (Eucyclops) wixarica Mercado-Salas & Suárez-Morales, 2016
    marine, brackish, fresh, terrestrial
    Lindberg, K. (1958). Un Cyclopide (Crustacé Copépode) récolté par Monsieur Patrice Paulian dans l'île Amsterdam. Revue de la synonymie et de la répartition géographique des espèces du genre Paracyclops (C. Claus 1893). [A Cyclopid (Copepod Crustacean) collected by Mr. Patrice Paulian on Amsterdam Island. Review of the synonymy and geographical distribution of species of the genus Paracyclops (C. Claus 1893).]. <em>Arkiv för Zoologi.</em> n. ser. 11(20): 355-377, figs. 1-2. (14-iii-1958). [details] Available for editors  PDF available [request]
    Walter, T.C.; Boxshall, G. (2025). World of Copepods Database. Eucyclops Claus, 1893. Accessed at: https://www.marinespecies.org/copepoda/aphia.php?p=taxdetails&id=149781 on 2026-03-05
    Date
    action
    by
    2005-03-30 12:51:50Z
    created
    Cuvelier, Daphne
    2010-07-02 18:56:27Z
    checked
    Walter, T. Chad
    2015-05-11 06:37:22Z
    changed
    Walter, T. Chad
    2020-10-14 11:49:16Z
    changed
    Walter, T. Chad
    2025-04-25 12:54:46Z
    changed
    Boxshall, Geoff

    original description Lindberg, K. (1958). Un Cyclopide (Crustacé Copépode) récolté par Monsieur Patrice Paulian dans l'île Amsterdam. Revue de la synonymie et de la répartition géographique des espèces du genre Paracyclops (C. Claus 1893). [A Cyclopid (Copepod Crustacean) collected by Mr. Patrice Paulian on Amsterdam Island. Review of the synonymy and geographical distribution of species of the genus Paracyclops (C. Claus 1893).]. <em>Arkiv för Zoologi.</em> n. ser. 11(20): 355-377, figs. 1-2. (14-iii-1958). [details] Available for editors  PDF available [request]

    original description (of Leptocyclops Sars G.O., 1914) Sars, G.O. (1914). Copepoda Cyclopoida. Parts V & VI. Cyclopidae (continued). <em>An Account of the Crustacea of Norway, with short descriptions and figures of all the species. Bergen Museum, Bergen.</em> 6:57-80, pls. 33-48. (look up in IMIS) [details] OpenAccess publication

    taxonomy source Novikov, A., D. Sharafutdinova, E. Abramova, T. Mayor & E. Chertoprud. (2025). An integrative approach to the delimitation of pseudocryptic species in the Eucyclops speratus complex (Copepoda, Cyclopoida) with a description of a new species. <em>ZooKeys.</em> 1226: 217-260., available online at https://doi.org/10.3897/zookeys.1226.138389
    note: The authors challenged Alekseev's subgeneric division of the genus and wrote "The phylogenetic relationships of E. speratus are unclear. According to Alekseev (2019), it belongs to the subgenus E. (Sp...    
    The authors challenged Alekseev's subgeneric division of the genus and wrote "The phylogenetic relationships of E. speratus are unclear. According to Alekseev (2019), it belongs to the subgenus E. (Speratocyclops) together with the species group E. arcanus Alekseev, 1990. In our opinion, it is currently impossible to construct a phylogeny of the genus. Morphological data on most species of the genus are very incomplete. Genetic methods give an ambiguous picture with a small sample of species. Therefore, we believe that Alekseev’s allocation of subgenera was premature. Some of its subgenera do not have synapomorphies."
    [details] Available for editors  PDF available [request]

    basis of record Integrated Taxonomic Information System (ITIS). , available online at http://www.itis.gov [details] 

    additional source Kiefer, F. (1929). Crustacea Copepoda. 2. Cyclopoida Gnathostoma. <em>Das Tierreich, Berlin und Leipzig.</em> 53:1-102. [German].
    page(s): 29-31 [details] Available for editors  PDF available [request]

    additional source Kiefer, F. (1952). Copepoda Calanoida und Cyclopoida. <em>Exploration du Parc National Albert, Mission H. Damas (1935-1936), Institut des Parcs Nationaux du Congo Belge.</em> 21: 1-136, figs. 1-192, A-H, tabs. 1-21. [details] Available for editors  PDF available [request]

    additional source Monchenko, V.I. (1974). Shchelepnoroti tsiklopodiny, tsiklopi (Cyclopidae). Gnathostoma, Cyclopoida, (Cyclopidae). [Sliver-clawed cyclopoids, Cyclops (Cyclopidae). Gnathnostoma, Cyclopoida, (Cyclopidae).]. <em>Fauna Ukrainy, Fauna of Ukraine, Vidavnitstvo Naukova Dumka, Kiev.</em> 27(3):1-452, figs. 1-142. (28-vi-1974, Ukrainian).
    page(s): 80-83 [details] Available for editors  PDF available [request]

    additional source Lindberg, K. (1939). Cyclopides (Crustacés Copépodes) de l'Inde. I. [Cyclopida (Crustacea Copepods) of India. I.]. <em>Records of the Indian Museum, Calcutta.</em> 41(1):45-56, figs. 1-4, 2 tables (iii-1939). [details] Available for editors  PDF available [request]

    additional source Rylov, V.M. (1963). Freshwater Cyclopoida. Cyclopoida presnykh vod. <em>Fauna of USSR, Crustacea.</em> 3(3): i-vi, 1-314, figs. 1-79. ( Translation by Israel Program Scient. Trans. of Rylov, V.M. (1948). Cyclopoida presnyk vod. Cyclopoid fauna. Fauna SSSR Rakoobraznye, Moscow. 3(3):1-318, figs. 1-79. [details] Available for editors  PDF available [request]

    additional source Smyly, W.J.P. (1955). Seasonal variation in length of furcal rami in the subgenus Eucyclops (Cyclopidae). Annals and Magazine of Natural History (12)8:636-638. (viii-1955), available online at https://doi.org/10.1080/00222935508655676 [details] Available for editors  PDF available [request]

    additional source Mercado-Salas, N. & E. Suárez-Morales. (2021). On the taxonomic status of some South American Eucyclops (Copepoda: Cyclopoida: Eucyclopinae). <em>Limnetica.</em> 40(1):1-19., available online at https://doi.org/10.23818/limn.40.09 [details] Available for editors  PDF available [request]

    additional source Ding, R., F.Z. Chen & V.R. Alekseev. (2022). A redescription of the rare eucyclopine copepod Eucyclops productus Kiefer, 1939 (Multicrustacea: Copepoda: Cyclopoida: Cyclopidae) and a key to Eucyclops subgenera and species of China and adjacent areas. <em>Zootaxa.</em> 5182(4):377-388. Sep 2022., available online at https://doi.org/10.11646/zootaxa.5182.4.4
    note: key to Eucyclops subgenera and species of China [details] Available for editors  PDF available [request]

    additional source Alekseev, V.R. (2024). Genera Eucyclops Claus, 1893, Isocyclops Kiefer, 1957 and Stygocyclops Pleša, 1971 (Copepoda: Cyclopoida) Identification guide of the world fauna. <em>In: Dumont, H.J.F. (ed.). Identification guides to the plankton and benthos of inland waters. Arthropoda Selecta Supplement No. 6, KMK Scientific Press, Moscow.</em> 28:1-201. [details] Available for editors  PDF available [request]

    new combination reference Alekseev, V.R. (2019). Revision of the genus Eucyclops (Claus, 1893) and subfamily Eucyclopinae of the world fauna. <em>Arthropoda Selecta.</em> 28(4):490-514., available online at https://doi.org/10.15298/arthsel.28.4.03 [details] Available for editors  PDF available [request]
    		 
     Present  Inaccurate  Introduced: alien  Containing type locality 
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    3x5 C.B. Wilson Taxonomic Card - Eucyclops Document hosted within Copepoda 
    3x5 C.B. Wilson Taxonomic Card - Leptocyclops Document hosted within Copepoda (from synonym Leptocyclops Sars G.O., 1914)
    To European Nucleotide Archive, ENA (Eucyclops) 
    To Genbank 
    To ITIS