1. Species Sergia inoa (Faxon, 1893)
2. Species Sergia laminata (Burkenroad, 1940)
3. Species Sergia remipes Stimpson, 1860
4. Species Sergia tenuiremis (Krøyer, 1855)
5. Species Sergia bigemmea (Burkenroad, 1940) accepted as Gardinerosergia bigemmea (Burkenroad, 1940) (unaccepted > superseded combination)
6. Species Sergia bisulcata (Wood-Mason in Wood-Mason & Alcock, 1891) accepted as Phorcosergia bisulcata (Wood-Mason in Wood-Mason & Alcock, 1891) (unaccepted > superseded combination)
7. Species Sergia burukovskii Vereshchaka, 2000 accepted as Phorcosergia burukovskii (Vereshchaka, 2000) (unaccepted > superseded combination)
8. Species Sergia challengeri (Hansen, 1903) accepted as Challengerosergia challengeri (Hansen, 1903) (unaccepted > superseded combination)
9. Species Sergia clausi König, 1895 accepted as Parasergestes vigilax (Stimpson, 1860) (unaccepted > junior subjective synonym)
10. Species Sergia colosii (Cecchini, 1933) accepted as Lucensosergia colosii (Cecchini, 1933) (unaccepted > superseded combination)
11. Species Sergia creber (Burkenroad, 1940) accepted as Sergia regalis (Gordon, 1939) accepted as Robustosergia regalis (Gordon, 1939) (unaccepted > superseded combination)
12. Species Sergia crosnieri Vereshchaka, 2000 accepted as Lucensosergia crosnieri (Vereshchaka, 2000) (unaccepted > superseded combination)
13. Species Sergia erythraeensis Iwasaki & Couwelaar, 2001 accepted as Lucensosergia colosii (Cecchini, 1933) (unaccepted > junior subjective synonym)
14. Species Sergia extenuata (Burkenroad, 1940) accepted as Robustosergia extenuata (Burkenroad, 1940) (unaccepted > superseded combination)
15. Species Sergia filicta (Burkenroad, 1940) accepted as Phorcosergia filicta (Burkenroad, 1940) (unaccepted > superseded combination)
16. Species Sergia foresti Kensley & Judkins, 2008 accepted as Lucensosergia foresti (Kensley & Judkins, 2008) (unaccepted > superseded combination)
17. Species Sergia fulgens (Hansen, 1919) accepted as Challengerosergia fulgens (Hansen, 1919) (unaccepted > superseded combination)
18. Species Sergia gardineri (Kemp, 1913) accepted as Gardinerosergia gardineri (Kemp, 1913) (unaccepted > superseded combination)
19. Species Sergia grandis (Sund, 1920) accepted as Phorcosergia grandis (Sund, 1920) (unaccepted > superseded combination)
20. Species Sergia hanseni Vereshchaka, 1994 accepted as Sergia hansjacobi Vereshchaka, 1994 accepted as Challengerosergia hansjacobi (Vereshchaka, 1994) (unaccepted > nomen nudum)
21. Species Sergia hansjacobi Vereshchaka, 1994 accepted as Challengerosergia hansjacobi (Vereshchaka, 1994) (unaccepted > superseded combination)
22. Species Sergia henseni Ortmann, 1893 accepted as Deosergestes henseni (Ortmann, 1893)
23. Species Sergia inequalis (Burkenroad, 1940) accepted as Gardinerosergia inequalis (Burkenroad, 1940) (unaccepted > superseded combination)
24. Species Sergia japonica (Spence Bate, 1881) accepted as Sergia remipes Stimpson, 1860 (unaccepted > junior subjective synonym)
25. Species Sergia japonicus (Spence Bate, 1881) accepted as Sergia japonica (Spence Bate, 1881) accepted as Sergia remipes Stimpson, 1860 (unaccepted > superseded combination)
26. Species Sergia jeppeseni Vereshchaka, 2000 accepted as Challengerosergia jeppeseni (Vereshchaka, 2000) (unaccepted > superseded combination)
27. Species Sergia kensleyi Vereshchaka, 2000 accepted as Gardinerosergia kensleyi (Vereshchaka, 2000) (unaccepted > superseded combination)
28. Species Sergia kroyeri (Spence Bate, 1881) accepted as Sergia tenuiremis (Krøyer, 1855) (unaccepted > junior subjective synonym)
29. Species Sergia lucens (Hansen, 1922) accepted as Lucensosergia lucens (Hansen, 1922) (unaccepted > superseded combination)
30. Species Sergia manningorum Froglia & Gramitto, 2000 accepted as Robustosergia robusta (Smith, 1882) (unaccepted > junior subjective synonym)
31. Species Sergia maxima (Burkenroad, 1940) accepted as Phorcosergia maxima (Burkenroad, 1940) (unaccepted > superseded combination)
32. Species Sergia oksanae Vereshchaka, 2000 accepted as Challengerosergia oksanae (Vereshchaka, 2000) (unaccepted > superseded combination)
33. Species Sergia phorca (Faxon, 1893) accepted as Phorcosergia phorca (Faxon, 1893) (unaccepted > superseded combination)
34. Species Sergia plumea (Illig, 1927) accepted as Phorcosergia plumea (Illig, 1927)
35. Species Sergia potens (Burkenroad, 1940) accepted as Phorcosergia potens (Burkenroad, 1940) (unaccepted > superseded combination)
36. Species Sergia prehensilis (Spence Bate, 1881) accepted as Prehensilosergia prehensilis (Spence Bate, 1881) (unaccepted > superseded combination)
37. Species Sergia profunda (Spence Bate, 1888) accepted as Sergia remipes Stimpson, 1860 (unaccepted > junior subjective synonym)
38. Species Sergia regalis (Gordon, 1939) accepted as Robustosergia regalis (Gordon, 1939) (unaccepted > superseded combination)
39. Species Sergia robusta (Smith, 1882) accepted as Robustosergia robusta (Smith, 1882) (unaccepted > superseded combination)
40. Species Sergia robustus (Smith, 1882) accepted as Sergia robusta (Smith, 1882) accepted as Robustosergia robusta (Smith, 1882) (unaccepted > misspelling - incorrect subsequent spelling)
41. Species Sergia scintillans (Burkenroad, 1940) accepted as Scintillosergia scintillans (Burkenroad, 1940) (unaccepted > superseded combination)
42. Species Sergia splendens (Sund, 1920) accepted as Gardinerosergia splendens (Sund, 1920) (unaccepted > superseded combination)
43. Species Sergia stellata (Burkenroad, 1940) accepted as Challengerosergia stellata (Burkenroad, 1940) (unaccepted > superseded combination)
44. Species Sergia talismani (Barnard, 1946) accepted as Challengerosergia talismani (Barnard, 1947) (unaccepted > superseded combination)
45. Species Sergia umitakae Hashizume & Omori, 1995 accepted as Challengerosergia umitakae (Hashizume & Omori, 1995) (unaccepted > superseded combination)
46. Species Sergia vityazi Vereshchaka, 2000 accepted as Robustosergia vityazi (Vereshchaka, 2000) (unaccepted > superseded combination)
47. Species Sergia wolffi Vereshchaka, 1994 accepted as Phorcosergia wolffi (Vereshchaka, 1994) (unaccepted > superseded combination)

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