1. Species Chydorus aciculatus Chen Shou-zhong, 1991
2. Species Chydorus albicans (Nicolet, 1849)
3. Species Chydorus alexandrovi Poggenpol, 1874
4. Species Chydorus angustirostris Frey, 1987
5. Species Chydorus baicalensis Smirvov & Sheveleva, 1996
6. Species Chydorus barbatus Brady, 1868
7. Species Chydorus bicollaris Frey, 1982
8. Species Chydorus bicornutus Doolitle, 1909
9. Species Chydorus biovatus Frey, 1985
10. Species Chydorus brehmi Biswas, 1966
11. Species Chydorus brevidentatus Chiang Sieh-chih, 1963
12. Species Chydorus brevilabris Frey, 1980
13. Species Chydorus caelatus Schödler, 1862
14. Species Chydorus canadensis Chengalath & Hann, 1981
15. Species Chydorus ceylonicus Daday, 1898
16. Species Chydorus ciliatus Poggenpol, 1874
17. Species Chydorus clelandi Henry, 1919
18. Species Chydorus denticulatus Henry, 1919
19. Species Chydorus dentifer Daday, 1905
20. Species Chydorus eurynotus G.O. Sars, 1901
21. Species Chydorus faviformis Birge, 1893
22. Species Chydorus favosa (Brady, 1868)
23. Species Chydorus gibbus G.O. Sars, 1890
24. Species Chydorus gibsoni Brady, 1906
25. Species Chydorus godeti Delachaux, 1919
26. Species Chydorus herrmanni Brehm, 1934
27. Species Chydorus invaginatus Frey, 1982
28. Species Chydorus irinae Smirnov & Sheveleva, 2010
29. Species Chydorus kallipygos Brehm, 1934
30. Species Chydorus labrosus Smirnov, 1996
31. Species Chydorus laticornis Brehm, 1950
32. Species Chydorus latifrons (Dana, 1852)
33. Species Chydorus latus G.O. Sars, 1862
34. Species Chydorus leonardi King, 1853
35. Species Chydorus linguilabris Frey, 1982
36. Species Chydorus macquariensis Brady, 1918
37. Species Chydorus minor G.O. Sars, 1891
38. Species Chydorus minutus Thomson, 1878
39. Species Chydorus mutilatus Chen Shou-zhong, 1991
40. Species Chydorus nitidulus (G.O. Sars, 1901)
41. Species Chydorus nitidus Schödler, 1862
42. Species Chydorus nomeralis Bergamin, 1939
43. Species Chydorus obscurirostris Frey, 1987
44. Species Chydorus opacus Frey, 1987
45. Species Chydorus ovalis Kurz, 1875
46. Species Chydorus parvireticulatus Frey, 1987
47. Species Chydorus parvus Daday, 1898
48. Species Chydorus patagonicus Ekman, 1900
49. Species Chydorus pectinatus Delachaux, 1919
50. Species Chydorus pizzarri Alonso, 1988
51. Species Chydorus plumatus Loeffler, 1961
52. Species Chydorus pubescens G.O. Sars, 1901
53. Species Chydorus punctatus Hellich, 1877
54. Species Chydorus reticulatus Daday, 1898
55. Species Chydorus rylovi Mukhamediev, 1963
56. Species Chydorus sinensis Frey, 1987
57. Species Chydorus sphaericus (O.F. Müller, 1776)
58. Species Chydorus spinosus Chen Shou-zhong, 1991
59. Species Chydorus striatus Klocke, 1893
60. Species Chydorus tenuirostris (Fischer, 1851)
61. Species Chydorus tilhoi Rey & Saint-Jeans, 1969
62. Species Chydorus tuberculatus Poggenpol, 1874
63. Species Chydorus undulatus Chiang, 1963
64. Species Chydorus ventricosus Daday, 1898
65. Species Chydorus arcticus Røen, 1987 accepted as Chydorus sphaericus (O.F. Müller, 1776)
66. Species Chydorus augustus King, 1853 accepted as Pseudochydorus augustus (King, 1853)
67. Species Chydorus carolinae Methuen, 1910 accepted as Pleuroxus carolinae (Methuen, 1910)
68. Species Chydorus clavata Cosmovici, 1900 accepted as Leydigia acanthocercoides (Fischer, 1854)
69. Species Chydorus coelatus Werestchagin, 1913 accepted as Chydorus sphaericus (O.F. Müller, 1776)
70. Species Chydorus flavescens Daday, 1905 accepted as Chydorus eurynotus G.O. Sars, 1901
71. Species Chydorus globiformis Dybowski & Grochowski, 1898 accepted as Pseudochydorus globosus (Baird, 1843)
72. Species Chydorus globosus Baird, 1843 accepted as Pseudochydorus globosus (Baird, 1843)
73. Species Chydorus grandis Rammner, 1940 accepted as Paralona pigra G.O. Sars, 1862
74. Species Chydorus hybridus Daday, 1905 accepted as Ephemeroporus hybridus (Daday, 1905)
75. Species Chydorus jugosus Henry, 1922 accepted as Pleuroxus jugosus (Henry, 1922)
76. Species Chydorus lævis G.O. Sars, 1904 accepted as Ephemeroporus laevis (G.O. Sars, 1904)
77. Species Chydorus letourneuxi Richard, 1888 accepted as Pleuroxus letourneuxi (Richard, 1888)
78. Species Chydorus lynceus Langhans, 1911 accepted as Chydorus sphaericus (O.F. Müller, 1776)
79. Species Chydorus mutilus Kreis, 1921 accepted as Chydorus sphaericus (O.F. Müller, 1776)
80. Species Chydorus nodulosa Lilljeborg, 1901 accepted as Paralona pigra G.O. Sars, 1862
81. Species Chydorus paradoxus Shikleev, 1930 accepted as Pseudochydorus globosus (Baird, 1843)
82. Species Chydorus perspique Lilljeborg, 1901 accepted as Paralona pigra G.O. Sars, 1862
83. Species Chydorus phintonicus Margaritora, 1969 accepted as Ephemeroporus phintonicus (Margaritora, 1969)
84. Species Chydorus piger G.O. Sars, 1862 accepted as Paralona pigra G.O. Sars, 1862
85. Species Chydorus pigroides Lilljeborg, 1901 accepted as Pleuroxus pigroides (Lilljeborg, 1901)
86. Species Chydorus poppei Richard, 1897 accepted as Ephemeroporus poppei (Richard, 1897)
87. Species Chydorus robustus Stingelin, 1905 accepted as Chydorus parvus Daday, 1898
88. Species Chydorus rugulosus Forbes, 1890 accepted as Chydorus gibbus G.O. Sars, 1890
89. Species Chydorus simplex Baker, 1912 accepted as Pleuroxus simplex (Baker, 1912)
90. Species Chydorus sphaericoides G.O. Sars, 1909 accepted as Chydorus patagonicus Ekman, 1900
91. Species Chydorus thienemanni Meuche, 1937 accepted as Paralona pigra G.O. Sars, 1862
92. Species Chydorus tridentatus Bergamin, 1939 accepted as Ephemeroporus tridentatus (Bergamin, 1939)
93. Species Chydorus unispinus Henry, 1922 accepted as Pleuroxus unispinus (Henry, 1922)

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