1. Species Polycera abei (Baba, 1960)
2. Species Polycera alabe Collier & Farmer, 1964
3. Species Polycera anae Pola, Sánchez-Benítez & Ramiro, 2014
4. Species Polycera atra MacFarland, 1905
5. Species Polycera aurantiomarginata García-Gómez & Bobo, 1984
6. Species Polycera aurisula Er. Marcus, 1957
7. Species Polycera capensis Quoy & Gaimard, 1824
8. Species Polycera chilluna Er. Marcus, 1961
9. Species Polycera elegans (Bergh, 1894)
10. Species Polycera faeroensis Lemche, 1929
11. Species Polycera fujitai Baba, 1937
12. Species Polycera hedgpethi Er. Marcus, 1964
13. Species Polycera herthae Ev. Marcus & Er. Marcus, 1963
14. Species Polycera hummi Abbott, 1952
15. Species Polycera janjukia Burn, 1962
16. Species Polycera japonica Baba, 1949
17. Species Polycera kaiserae Hermosillo & Á. Valdés, 2007
18. Species Polycera kernowensis Korshunova, Driessen, Picton & Martynov, 2021
19. Species Polycera maculata Pruvot-Fol, 1951
20. Species Polycera maddoxi M. C. Miller, 2005
21. Species Polycera manzanilloensis Ortea, Espinosa & Camacho, 1999
22. Species Polycera marplatensis Franceschi, 1928
23. Species Polycera melanosticta M. C. Miller, 1996
24. Species Polycera nimbsi Pola, Miguel-González & Paz-Sedano, 2023
25. Species Polycera norvegica Sørensen, Rauch, Pola & Malaquias, 2020
26. Species Polycera odhneri Er. Marcus, 1955
27. Species Polycera parvula (Burn, 1958)
28. Species Polycera picta Risbec, 1928
29. Species Polycera priva Er. Marcus, 1959
30. Species Polycera quadrilineata (O. F. Müller, 1776)
31. Species Polycera risbeci Odhner, 1941
32. Species Polycera rycia Er. Marcus & Ev. Marcus, 1970
33. Species Polycera tricolor Robilliard, 1971
34. Species Polycera xicoi Ortea & Rolán, 1989
35. Subgenus Polycera (Greilada) Bergh, 1894 accepted as Greilada Bergh, 1894 accepted as Polycera Cuvier, 1816
    1. Species Polycera (Greilada) messinensis Odhner, 1941 accepted as Polycera elegans (Bergh, 1894)
36. Species Polycera atlantica Pruvot-Fol, 1956 accepted as Polycera elegans (Bergh, 1894)
37. Species Polycera citrina Alder & Hancock, 1841 accepted as Palio dubia (M. Sars, 1829)
38. Species Polycera conspicua J. K. Allan, 1932 accepted as Polycera capensis Quoy & Gaimard, 1824
39. Species Polycera cooki Angas, 1864 accepted as Paliolla cooki (Angas, 1864) (original combination)
40. Species Polycera cornigera A. Adams & Reeve, 1848 accepted as Ceratosoma trilobatum (J. E. Gray, 1850)
41. Species Polycera cristata Alder, 1841 accepted as Ancula gibbosa (Risso, 1818) (synonym)
42. Species Polycera dubia M. Sars, 1829 accepted as Palio dubia (M. Sars, 1829) (original combination)
43. Species Polycera gnupa Er. Marcus & Ev. Marcus, 1967 accepted as Polycera hedgpethi Er. Marcus, 1964
44. Species Polycera horrida Hesse, 1872 accepted as Aegires punctilucens (A. d'Orbigny, 1837) (synonym)
45. Species Polycera incognita (Ortea, Espinosa & Caballer, 2005) accepted as Kankelibranchus incognitus Ortea, Espinosa & Caballer, 2005
46. Species Polycera lessoni A. d'Orbigny, 1837 accepted as Polycera lessonii A. d'Orbigny, 1837 accepted as Palio dubia (M. Sars, 1829) (misspelling of specific epithet)
47. Species Polycera lessoni Risbec, 1928 accepted as Polycera risbeci Odhner, 1941 (unaccepted > junior homonym, invalid: junior homonym of Polycera lessoni d'Orbigny, 1837; P. risbeci and P. pruvotae are replacement names)
48. Species Polycera lessonii A. d'Orbigny, 1837 accepted as Palio dubia (M. Sars, 1829) (junior synonym)
49. Species Polycera lineatus Risso, 1826 accepted as Polycera quadrilineata (O. F. Müller, 1776) (synonym)
50. Species Polycera mediterranea Bergh, 1879 accepted as Polycera quadrilineata (O. F. Müller, 1776)
51. Species Polycera messinensis Odhner, 1941 accepted as Polycera elegans (Bergh, 1894)
52. Species Polycera modesta Lovén, 1846 accepted as Palio dubia (M. Sars, 1829)
53. Species Polycera nigrocrocea Barnard, 1927 accepted as Polycera capensis Quoy & Gaimard, 1824
54. Species Polycera nigrolineata Dautzenberg & Durouchoux, 1913 accepted as Polycera quadrilineata (O. F. Müller, 1776)
55. Species Polycera nigropicta Ihering, 1885 accepted as Polycera quadrilineata (O. F. Müller, 1776)
56. Species Polycera nothus (G. Johnston, 1838) accepted as Palio nothus (G. Johnston, 1838) (assigned to genus Palio)
57. Species Polycera ocellata Alder & Hancock, 1842 accepted as Palio nothus (G. Johnston, 1838) (dubious synonym)
58. Species Polycera ornata A. d'Orbigny, 1837 accepted as Polycera quadrilineata (O. F. Müller, 1776) (synonym)
59. Species Polycera pruvotae Risbec, 1953 accepted as Polycera risbeci Odhner, 1941
60. Species Polycera pudica Lovén, 1846 accepted as Palio dubia (M. Sars, 1829) (dubious synonym)
61. Species Polycera punctilucens A. d'Orbigny, 1837 accepted as Aegires punctilucens (A. d'Orbigny, 1837) (original combination)
62. Species Polycera ramulosa Stimpson, 1855 accepted as Plocamopherus ramulosus (Stimpson, 1855) (unaccepted > superseded combination)
63. Species Polycera salamandra Labbé, 1931 accepted as Polycera quadrilineata (O. F. Müller, 1776)
64. Species Polycera tabescens Risbec, 1928 accepted as Tambja limaciformis (Eliot, 1908) accepted as Martadoris limaciformis (Eliot, 1908)
65. Species Polycera typica W. Thompson, 1840 accepted as Polycera quadrilineata (O. F. Müller, 1776)
66. Species Polycera varians M. Sars, 1840 accepted as Polycera quadrilineata (O. F. Müller, 1776)
67. Species Polycera webbi A. d'Orbigny, 1839 accepted as Felimare picta (R. A. Philippi, 1836)
68. Species Polycera zeylanica Kelaart, 1858 accepted as Plocamopherus ceylonicus (Kelaart, 1858)
69. Species Polycera zosterae O'Donoghue, 1924 accepted as Palio zosterae (O'Donoghue, 1924)
70. Species Polycera capitata (Alder & Hancock, 1854) accepted as Polycera norvegica Sørensen, Rauch, Pola & Malaquias, 2020 (uncertain > nomen dubium)
71. Species Polycera funerea Pruvot-Fol, 1930 (uncertain > nomen dubium)

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