1. Species Oithona alvarezi Lindberg, 1955
2. Species Oithona amazonica Burckhardt, 1913
3. Species Oithona aruensis Früchtl, 1923
4. Species Oithona atlantica Farran, 1908
5. Species Oithona attenuata Farran, 1913
6. Species Oithona australis Nishida, 1986
7. Species Oithona bjornbergae Ferrari F.D. & Bowman, 1980
8. Species Oithona bowmani Rocha C.E.F., 1986
9. Species Oithona colcarva Bowman, 1975
10. Species Oithona cruralis Nishida, Tanaka & Omori, 1977
11. Species Oithona davisae Ferrari F.D. & Orsi, 1984
12. Species Oithona decipiens Farran, 1913
13. Species Oithona dissimilis Lindberg, 1940
14. Species Oithona erythrops Brady, 1915
15. Species Oithona fallax Farran, 1913
16. Species Oithona farrani (Brady, 1915)
17. Species Oithona flemingeri (Ferrari & Bowman, 1980)
18. Species Oithona fonsecae Ferrari & Bowman, 1980
19. Species Oithona fragilis Nishida, 1979
20. Species Oithona frigida Giesbrecht, 1902
21. Species Oithona gessneri Kiefer, 1954
22. Species Oithona hamata Rosendorn, 1917
23. Species Oithona hebes Giesbrecht, 1891
24. Species Oithona linearis Giesbrecht, 1891
25. Species Oithona longispina Nishida, Tanaka & Omori, 1977
26. Species Oithona minuta Scott T., 1894
27. Species Oithona nana Giesbrecht, 1893
28. Species Oithona nishidai McKinnon, 2000
29. Species Oithona oswaldocruzi Oliveira, 1945
30. Species Oithona pacifica (Nishida, 1985)
31. Species Oithona parvula (Farran, 1908)
32. Species Oithona plumifera Baird, 1843
33. Species Oithona pseudofrigida Rosendorn, 1917
34. Species Oithona pseudovivida Shuvalov, 1980
35. Species Oithona pulla (Farran, 1913)
36. Species Oithona robertsoni McKinnon, 2000
37. Species Oithona robusta Giesbrecht, 1891
38. Species Oithona rostralis Nishida, Tanaka & Omori, 1977
39. Species Oithona similis Claus, 1866
40. Species Oithona splendens Baird, 1843
41. Species Oithona tenuis Rosendorn, 1917
42. Species Oithona vivida Farran, 1913
43. Species Oithona wellershausi Ferrari F.D., 1982
44. Species Oithona aculeata Farran, 1913 accepted as Oithona oculata Farran, 1913 accepted as Dioithona oculata (Farran, 1913) (unaccepted > misspelling - incorrect original spelling, Binet Dessier 1968 reported this aculeata, correct is oculata)
45. Species Oithona alia (Kiefer, 1935) accepted as Oithona rigida Giesbrecht, 1896 accepted as Dioithona rigida (Giesbrecht, 1896) (synonym according to Nishida, 1985)
46. Species Oithona canhanhae Oliveira, 1945 accepted as Oithona hebes Giesbrecht, 1891 (placed in synonymy by da Rocha, 1986)
47. Species Oithona challengeri Brady, 1883 accepted as Oithona setigera Dana, 1853-1855 represented as Oithona setigera setigera Dana, 1853-1855 (listed as synonym by Nishida, 1985)
48. Species Oithona helgolandica (Claus, 1863) accepted as Oithona similis Claus, 1866
49. Species Oithona horai Sewell, 1934 accepted as Dioithona horai (Sewell, 1934)
50. Species Oithona neotropica Herbst, 1967 accepted as Oithona oswaldocruzi Oliveira, 1945 (placed in synonymy by da Rocha, 1986)
51. Species Oithona oculata Farran, 1913 accepted as Dioithona oculata (Farran, 1913) (synonym )
52. Species Oithona oligohalina Fonseca & Björnberg T.K.S., 1976 accepted as Oithona oswaldocruzi Oliveira, 1945 (placed in synonymy by da Rocha, 1986)
53. Species Oithona oraemaris Oliveira, 1946 accepted as Oithona hebes Giesbrecht, 1891 (placed in synonymy by da Rocha, 1986)
54. Species Oithona ovalis Herbst, 1955 accepted as Oithona hebes Giesbrecht, 1891 (placed in synonymy by da Rocha, 1986)
55. Species Oithona ovata Lindberg, 1950 accepted as Oithona attenuata Farran, 1913 (synonymised by Nishida, 1985)
56. Species Oithona pelagica Farran, 1908 accepted as Oithona setigera Dana, 1853-1855 represented as Oithona setigera setigera Dana, 1853-1855 (listed as synonym by Nishida, 1985)
57. Species Oithona plumifera Dana, 1853-1855 accepted as Oithona plumifera Baird, 1843 (wrong author attribution for species)
58. Species Oithona plumosa Lindberg, 1947 accepted as Oithona nana Giesbrecht, 1893 (synonymised by Nishida, 1985)
59. Species Oithona pygmaea Boeck, 1865 accepted as Oithona similis Claus, 1866 (listed as probable synonym by Giesbrecht, 1892)
60. Species Oithona rigida Giesbrecht, 1896 accepted as Dioithona rigida (Giesbrecht, 1896)
61. Species Oithona sapucaiae Oliveira, 1945 accepted as Oithona hebes Giesbrecht, 1891 (placed in synonymy by da Rocha, 1986)
62. Species Oithona scriba (Dana, 1849-1852) accepted as Oithona plumifera Baird, 1843 (listed as synonym by Giesbrecht, 1892)
63. Species Oithona sinensis Burckhardt, 1913 accepted as Limnoithona sinensis (Burckhardt, 1913)
64. Species Oithona spinifrons Boeck, 1865 accepted as Oithona similis Claus, 1866
65. Species Oithona spinirostris Claus, 1863 accepted as Oithona setigera Dana, 1853-1855 represented as Oithona setigera setigera Dana, 1853-1855 (listed as synonym by Nishida, 1985)
66. Species Oithona spinulosa Lindberg, 1950 accepted as Oithona brevicornis Giesbrecht, 1891 represented as Oithona brevicornis brevicornis Giesbrecht, 1891 (synonym according to Nishida & Ferrari, 1983)
67. Species Oithona tropica Wolfenden, 1906 accepted as Oithona setigera Dana, 1853-1855 represented as Oithona setigera setigera Dana, 1853-1855 (listed as synonym by Nishida, 1985)
68. Species Oithona brevicornis Giesbrecht, 1891 represented as Oithona brevicornis brevicornis Giesbrecht, 1891
69. Species Oithona setigera Dana, 1853-1855 represented as Oithona setigera setigera Dana, 1853-1855
70. Species Oithona simplex Farran, 1913 represented as Oithona simplex simplex Farran, 1913
71. Species Oithona abbreviata (Dana, 1849-1852) (uncertain > taxon inquirendum, listed as "Unbestimmbare Species" by Giesbrecht, 1892)
72. Species Oithona minuta Krichagin, 1877 (uncertain > nomen dubium)

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