1. Subgenus Simocephalus (Aquipiculus) Orlova-Bienkowskaja, 1995
2. Subgenus Simocephalus (Coronocephalus) Orlova-Bienkowskaja, 1995
3. Species Simocephalus acutirostratus (King, 1853)
4. Species Simocephalus aegyptiacus (Fischer, 1860)
5. Species Simocephalus brehmi (Gauthier, 1939)
6. Species Simocephalus cacicus Moniez, 1889
7. Species Simocephalus congener (Koch, 1841)
8. Species Simocephalus daphnoides Herrick, 1883
9. Species Simocephalus elizabethae (King, 1853)
10. Species Simocephalus exspinosus (De Geer, 1778)
11. Species Simocephalus gibbosus G.O. Sars, 1896
12. Species Simocephalus heilongjiangensis Shi Xinlu & Shi Xinbai, 1994
13. Species Simocephalus latirostris Stingelin, 1906
14. Species Simocephalus lusaticus Herr, 1917
15. Species Simocephalus mirabilis Orlova-Bienkowskaja, 1998
16. Species Simocephalus mixtus G.O. Sars, 1903
17. Species Simocephalus nudifrons Delachaux, 1918
18. Species Simocephalus obtusatus (Thomson, 1878)
19. Species Simocephalus punctatus Orlova-Bienkowskaja, 1998
20. Species Simocephalus rostratus Herrick, 1884
21. Species Simocephalus semiserratus G.O. Sars, 1901
22. Species Simocephalus serrulatus (Koch, 1841)
23. Species Simocephalus spinosulus Stingelin, 1905
24. Species Simocephalus vetuloides G.O. Sars, 1899
25. Species Simocephalus vetulus (O.F. Müller, 1776)
26. Species Simocephalus victoriensis Dumont, 1983
27. Species Simocephalus acutifrons Johnson, 1953 accepted as Simocephalus brehmi (Gauthier, 1939)
28. Species Simocephalus aguabrankai Bergamin, 1939 accepted as Simocephalus serrulatus (Koch, 1841)
29. Species Simocephalus americanus Birge, 1879 accepted as Simocephalus serrulatus (Koch, 1841)
30. Species Simocephalus angustifrons Lilljeborg, 1901 accepted as Simocephalus vetulus (O.F. Müller, 1776)
31. Species Simocephalus armata Brehm, 1956 accepted as Simocephalus serrulatus (Koch, 1841)
32. Species Simocephalus beianensis Shi Xinlu & Shi Xinbai, 1994 accepted as Simocephalus vetulus (O.F. Müller, 1776)
33. Species Simocephalus capensis G.O. Sars, 1895 accepted as Simocephalus serrulatus (Koch, 1841)
34. Species Simocephalus corniger Methuen, 1910 accepted as Simocephalus mixtus G.O. Sars, 1903
35. Species Simocephalus dulvertonensis Smith, 1909 accepted as Simocephalus elizabethae (King, 1853)
36. Species Simocephalus fonsecai Bergamin, 1939 accepted as Simocephalus daphnoides Herrick, 1883
37. Species Simocephalus gajareae Rane, 1986 accepted as Simocephalus acutirostratus (King, 1853)
38. Species Simocephalus gebhardti Ponyi, 1955 accepted as Simocephalus vetulus (O.F. Müller, 1776)
39. Species Simocephalus gelida Brady, 1918 accepted as Daphnia (Ctenodaphnia) gelida (Brady, 1918)
40. Species Simocephalus himalayensis Chiang & Chen, 1974 accepted as Simocephalus exspinosus (De Geer, 1778)
41. Species Simocephalus hungaricus Ponyi, 1956 accepted as Simocephalus vetulus (O.F. Müller, 1776)
42. Species Simocephalus iheringi Richard, 1897 accepted as Simocephalus daphnoides Herrick, 1883
43. Species Simocephalus inflatus Vávra, 1900 accepted as Simocephalus serrulatus (Koch, 1841)
44. Species Simocephalus intermedia Studer, 1878 accepted as Daphnia intermedia (Studer, 1878)
45. Species Simocephalus kerhervei Bergamin, 1939 accepted as Simocephalus serrulatus (Koch, 1841)
46. Species Simocephalus mesorostris Orlova-Bienkowskaja, 1995 accepted as Simocephalus heilongjiangensis Shi Xinlu & Shi Xinbai, 1994
47. Species Simocephalus montenegrinus Werestchagin, 1912 accepted as Simocephalus serrulatus (Koch, 1841)
48. Species Simocephalus paradoxus Schödler, 1877 accepted as Simocephalus acutirostratus (King, 1853)
49. Species Simocephalus pelagicus Brehm, 1959 accepted as Simocephalus serrulatus (Koch, 1841)
50. Species Simocephalus productifrons Stingelin, 1905 accepted as Simocephalus serrulatus (Koch, 1841)
51. Species Simocephalus productus G.O. Sars, 1903 accepted as Simocephalus exspinosus (De Geer, 1778)
52. Species Simocephalus rotundifrons Brehm, 1934 accepted as Simocephalus serrulatus (Koch, 1841)
53. Species Simocephalus sibiricus G.O. Sars, 1899 accepted as Simocephalus exspinosus (De Geer, 1778)
54. Species Simocephalus sinucristatus Bergamin, 1939 accepted as Simocephalus daphnoides Herrick, 1883
55. Species Simocephalus surekhae Rane, 1985 accepted as Simocephalus serrulatus (Koch, 1841)
56. Species Simocephalus vamani Rane, 1985 accepted as Simocephalus exspinosus (De Geer, 1778)
57. Species Simocephalus vidyae Rane, 1983 accepted as Simocephalus acutirostratus (King, 1853)

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