1. Species Selenidium alleni Ray, 1930
2. Species Selenidium amphinomi Bhatia & Setna, 1938
3. Species Selenidium annulatum (Greeff, 1885) Levine, 1984
4. Species Selenidium branchiommatis Ray, 1930
5. Species Selenidium brasili Ray, 1930
6. Species Selenidium cantoui Ormières, 1979
7. Species Selenidium cirratuli Lankester, 1866
8. Species Selenidium cometomorpha Schrével, 1971
9. Species Selenidium costatum Siedlecki, 1903
10. Species Selenidium cruzi de Faria, da Cunha & da Fonseca, 1917
11. Species Selenidium curvicollum Bogolepova, 1953
12. Species Selenidium echinatum Caullery & Mesnil, 1899
13. Species Selenidium fallax MacGregor & Thomasson, 1965
14. Species Selenidium fauchaldi Levine, 1974
15. Species Selenidium filiformis Schrével, 1971
16. Species Selenidium foliatum Ray, 1930
17. Species Selenidium folium Hukui, 1939
18. Species Selenidium francianum Arvy, 1952
19. Species Selenidium halteroide Hasselman, 1926
20. Species Selenidium hermellae Hasselman, 1926
21. Species Selenidium mackinnonae Levine, 1971
22. Species Selenidium martinensis Levine, 1971
23. Species Selenidium melinnae Schrével, 1971
24. Species Selenidium mercierellae Théodoridès & Laubier, 1962
25. Species Selenidium orientale Bogolepova, 1953
26. Species Selenidium parvum Woodcock & Lodge, 1921
27. Species Selenidium pendula Giard, 1884
28. Species Selenidium pennatum Simdyanov, 1992
29. Species Selenidium plicatum Ray, 1930
30. Species Selenidium polydorae Ganapati, 1946
31. Species Selenidium productum Tuzet & Ormières, 1958
32. Species Selenidium rayi Levine, 1971
33. Species Selenidium sabellae Lankester, 1863
34. Species Selenidium sabellariae Schrével, 1971
35. Species Selenidium serpulae Lankester, 1863
36. Species Selenidium spatulatum Hasselman, 1926
37. Species Selenidium spinosis Ganapati, 1946
38. Species Selenidium spionis (von Kölliker, 1845)
39. Species Selenidium stellatum Tuzet & Ormières, 1965
40. Species Selenidium synaptae (Mingazzini, 1893) Levine, 1971
41. Species Selenidium telepsavi Stuart, 1871
42. Species Selenidium terebellae (von Kölliker, 1845)
43. Species Selenidium virgula Caullery & Mesnil, 1919
44. Species Selenidium vivax Gunderson & Small, 1986
45. Species Selenidium axiferens Fowell, 1936 accepted as Selenidioides axiferens Fowell, 1936 (synonym)
46. Species Selenidium caulleryi Brasil, 1907 accepted as Selenidioides caulleryi Brasil, 1907 (synonym)
47. Species Selenidium flabelligerae Tuzet & Ormières, 1958 accepted as Selenidium productum Tuzet & Ormières, 1958 (preoccupied)
48. Species Selenidium giganteum Harant, 1931 accepted as Lankesteria maculata Ormières, 1965 (synonym [in part], according to Levine (1988))
49. Species Selenidium grassei Théorides & Desportes, 1968 accepted as Selenidioides grassei Théorides & Desportes, 1968 (synonym)
50. Species Selenidium hollandei Vivier & Schrével, 1966 accepted as Selenidioides hollandei Vivier & Schrével, 1966 (synonym)
51. Species Selenidium intraepitheliale Reichenow, 1932 accepted as Selenidioides intraepitheliale Reichenow, 1932 (synonym)
52. Species Selenidium mesnili Brasil, 1909 accepted as Selenidioides mesnili Brasil, 1909 (synonym)
53. Species Selenidium metchnikovi Léger & Dubosq, 1917 accepted as Selenidioides metchnikovi Léger & Dubosq, 1917 (synonym)
54. Species Selenidium potamillae Mackinnon & Ray, 1933 accepted as Selenidioides potamillae Mackinnon & Ray, 1933 (synonym)
55. Species Selenidium sipunculi (Dogiel, 1907) accepted as Selenidioides sipunculi Dogiel, 1907 (synonym)

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