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 enesithsaba Toms, Pola, von der Heyden & Gosliner, 2026
11. Species Polycera faeroensis Lemche, 1929
12. Species Polycera fujitai Baba, 1937
13. Species Polycera hedgpethi Er. Marcus, 1964
14. Species Polycera herthae Ev. Marcus & Er. Marcus, 1963
15. Species Polycera hummi Abbott, 1952
16. Species Polycera janjukia Burn, 1962
17. Species Polycera japonica Baba, 1949
18. Species Polycera kaiserae Hermosillo & Á. Valdés, 2007
19. Species Polycera kernowensis Korshunova, Driessen, Picton & Martynov, 2021
20. Species Polycera lini S.-Q. Zhang & S.-P. Zhang, 2023
21. Species Polycera maculata Pruvot-Fol, 1951
22. Species Polycera maddoxi M. C. Miller, 2005
23. Species Polycera manzanilloensis Ortea, Espinosa & Camacho, 1999
24. Species Polycera marplatensis Franceschi, 1928
25. Species Polycera melanosticta M. C. Miller, 1996
26. Species Polycera namaquae Toms, Pola, von der Heyden & Gosliner, 2026
27. Species Polycera nimbsi Pola, Miguel-González & Paz-Sedano, 2023
28. Species Polycera norvegica Sørensen, Rauch, Pola & Malaquias, 2020
29. Species Polycera odhneri Er. Marcus, 1955
30. Species Polycera onomqhele Toms, Pola, von der Heyden & Gosliner, 2026
31. Species Polycera parvula (Burn, 1958)
32. Species Polycera picta Risbec, 1928
33. Species Polycera priva Er. Marcus, 1959
34. Species Polycera quadrilineata (O. F. Müller, 1776)
35. Species Polycera risbeci Odhner, 1941
36. Species Polycera rycia Er. Marcus & Ev. Marcus, 1970
37. Species Polycera tricolor Robilliard, 1971
38. Species Polycera xicoi Ortea & Rolán, 1989
39. Species Polycera capitata (Alder & Hancock, 1854) (uncertain > nomen dubium)
40. Species Polycera funerea Pruvot-Fol, 1930 (uncertain > nomen dubium)
41. 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)
42. Species Polycera atlantica Pruvot-Fol, 1956 accepted as Polycera elegans (Bergh, 1894)
43. Species Polycera ceylanica Kelaart, 1858 accepted as Plocamopherus ceylonicus (Kelaart, 1858) (unaccepted > superseded combination)
44. Species Polycera citrina Alder & Hancock, 1841 accepted as Palio dubia (M. Sars, 1829)
45. Species Polycera conspicua J. K. Allan, 1932 accepted as Polycera capensis Quoy & Gaimard, 1824
46. Species Polycera cooki Angas, 1864 accepted as Paliolla cooki (Angas, 1864) (original combination)
47. Species Polycera cornigera A. Adams & Reeve, 1848 accepted as Ceratosoma trilobatum (J. E. Gray, 1850)
48. Species Polycera cristata Alder, 1841 accepted as Ancula gibbosa (Risso, 1818) (unaccepted > junior subjective synonym)
49. Species Polycera dubia M. Sars, 1829 accepted as Palio dubia (M. Sars, 1829) (original combination)
50. Species Polycera gnupa Ev. Marcus & Er. Marcus, 1967 accepted as Polycera hedgpethi Er. Marcus, 1964
51. Species Polycera horrida Hesse, 1872 accepted as Aegires punctilucens (A. d'Orbigny, 1837) (synonym)
52. Species Polycera incognita (Ortea, Espinosa & Caballer, 2005) accepted as Kankelibranchus incognitus Ortea, Espinosa & Caballer, 2005
53. 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)
54. 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)
55. Species Polycera lessonii A. d'Orbigny, 1837 accepted as Palio dubia (M. Sars, 1829) (junior synonym)
56. Species Polycera lineatus Risso, 1826 accepted as Polycera quadrilineata (O. F. Müller, 1776) (synonym)
57. Species Polycera mediterranea Bergh, 1879 accepted as Polycera quadrilineata (O. F. Müller, 1776)
58. Species Polycera messinensis Odhner, 1941 accepted as Polycera elegans (Bergh, 1894)
59. Species Polycera modesta Lovén, 1846 accepted as Palio dubia (M. Sars, 1829)
60. Species Polycera nigrocrocea Barnard, 1927 accepted as Polycera capensis Quoy & Gaimard, 1824
61. Species Polycera nigrolineata Dautzenberg & Durouchoux, 1913 accepted as Polycera quadrilineata (O. F. Müller, 1776)
62. Species Polycera nigropicta Ihering, 1885 accepted as Polycera quadrilineata (O. F. Müller, 1776)
63. Species Polycera nothus (G. Johnston, 1838) accepted as Palio nothus (G. Johnston, 1838) (assigned to genus Palio)
64. Species Polycera ocellata Alder & Hancock, 1842 accepted as Palio nothus (G. Johnston, 1838) (dubious synonym)
65. Species Polycera ornata A. d'Orbigny, 1837 accepted as Polycera quadrilineata (O. F. Müller, 1776) (synonym)
66. Species Polycera pruvotae Risbec, 1953 accepted as Polycera risbeci Odhner, 1941
67. Species Polycera pudica Lovén, 1846 accepted as Palio dubia (M. Sars, 1829) (dubious synonym)
68. Species Polycera punctilucens A. d'Orbigny, 1837 accepted as Aegires punctilucens (A. d'Orbigny, 1837) (original combination)
69. Species Polycera ramulosa Stimpson, 1855 accepted as Plocamopherus ramulosus (Stimpson, 1855) (unaccepted > superseded combination)
70. Species Polycera salamandra Labbé, 1931 accepted as Polycera quadrilineata (O. F. Müller, 1776)
71. Species Polycera tabescens Risbec, 1928 accepted as Tambja limaciformis (Eliot, 1908) accepted as Martadoris limaciformis (Eliot, 1908)
72. Species Polycera typica W. Thompson, 1840 accepted as Polycera quadrilineata (O. F. Müller, 1776)
73. Species Polycera varians M. Sars, 1840 accepted as Polycera quadrilineata (O. F. Müller, 1776)
74. Species Polycera webbi A. d'Orbigny, 1839 accepted as Felimare picta (R. A. Philippi, 1836)
75. Species Polycera zosterae O'Donoghue, 1924 accepted as Palio zosterae (O'Donoghue, 1924)

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