1. Species Pseudione andamanicae Bourdon, 1976
2. Species Pseudione atlantica Bourdon, 1971
3. Species Pseudione borealis Caspers, 1939
4. Species Pseudione callianassae Kossmann, 1881
5. Species Pseudione chiesai Pereira, Doti & Roccatagliata, 2021
6. Species Pseudione confusa (Norman, 1886)
7. Species Pseudione crenulata G. O. Sars, 1898
8. Species Pseudione fibriata Richardson, 1910
9. Species Pseudione galacanthae Hansen, 1897
10. Species Pseudione hanseni Nierstrasz & Brender à Brandis, 1923
11. Species Pseudione hayi Nierstrasz & Brender à Brandis, 1931
12. Species Pseudione incerta Richardson, 1910
13. Species Pseudione intermedia Nierstrasz & Brender à Brandis, 1932
14. Species Pseudione itsindrae Bourdon, 1976
15. Species Pseudione ivanklini Horch, Huber, Araujo & Ribeiro, 2018
16. Species Pseudione japanensis Nierstrasz & Brender à Brandis, 1931
17. Species Pseudione kossmanni Nierstrasz & Brender à Brandis, 1923
18. Species Pseudione longicauda Shiino, 1937
19. Species Pseudione minimocrenulata Nierstrasz & Brender à Brandis, 1931
20. Species Pseudione munidae Barnard, 1920
21. Species Pseudione murawaiensis Page, 1985
22. Species Pseudione nephropsi Shiino, 1951
23. Species Pseudione sagamiensis Nierstrasz & Brender à Brandis, 1932
24. Species Pseudione serejoae Brito, Cardoso & Boyko, 2018
25. Species Pseudione subcrenulata Nierstrasz & Brender à Brandis, 1923
26. Species Pseudione tanimbarensis Markham, 1999
27. Species Pseudione affinis (G. O. Sars, 1883) accepted as Cryptione affinis (G. O. Sars, 1882) (unaccepted > superseded combination)
28. Species Pseudione ampla Markham, 1988 accepted as Cryptione parviramus (Adkison, 1988) (unaccepted > junior subjective synonym)
29. Species Pseudione asymmetrica Shiino, 1933 accepted as Asymmetrione asymmetrica (Shiino, 1933) (basionym)
30. Species Pseudione biacuta Bourdon, 1979 accepted as Eremitione biacuta (Bourdon, 1979)
31. Species Pseudione brandaoi Brian & Dartevelle, 1941 accepted as Eremitione brandaoi (Brian & Darteville, 1941)
32. Species Pseudione brattstroemi Stuardo, Vega & Cespedes, 1986 accepted as Robinione brattstroemi (Stuardo, Vega & Cespedes, 1986)
33. Species Pseudione calcinii Shiino, 1958 accepted as Eremitione calcinii (Shiino, 1958)
34. Species Pseudione caspersi Gruner, 1966 accepted as Pseudione borealis Caspers, 1939 (synonym)
35. Species Pseudione chapini Van Name, 1920 accepted as Progebiophilus chapini (Van Name, 1920) (unaccepted > superseded combination)
36. Species Pseudione chiloensis Román-Contreras & Wehrtmann, 1997 accepted as Cryptione chiloensis (Román-Contreras & Wehrtmann, 1997) (unaccepted > superseded combination)
37. Species Pseudione clevai Boyko, 2004 accepted as Cryptione clevai (Boyko, 2004) (unaccepted > superseded combination)
38. Species Pseudione clibanaricola Shiino, 1933 accepted as Eremitione clibanaricola (Shiino, 1933)
39. Species Pseudione cognata Markham, 1985 accepted as Cryptione cognata (Markham, 1985) (unaccepted > superseded combination)
40. Species Pseudione compressa Shiino, 1964 accepted as Ionella compressa (Shiino, 1964)
41. Species Pseudione convergens Stock, 1960 accepted as Pleurocrypta porcellanaelongicornis Hesse, 1876 (synonym)
42. Species Pseudione curtata Richardson, 1904 accepted as Aporobopyrus curtatus (Richardson, 1904) (basionym)
43. Species Pseudione diogeni Popov, 1929 accepted as Bopyrissa diogeni (Popov, 1929) (basionym)
44. Species Pseudione dohrni Bonnier, 1900 accepted as Pseudione callianassae Kossmann, 1881 (unaccepted > junior subjective synonym)
45. Species Pseudione dubia Bonnier, 1900 accepted as Pseudione hyndmanni (Bate & Westwood, 1867) accepted as Eremitione hyndmanni (Bate & Westwood, 1867) (nomen nudum)
46. Species Pseudione elongata (Hansen, 1897) accepted as Cryptione elongata Hansen, 1897 (unaccepted > superseded combination)
47. Species Pseudione euxinica Popov, 1929 accepted as Progebiophilus euxinicus (Popov, 1929) (basionym)
48. Species Pseudione filicaudata Shiino, 1958 accepted as Progebiophilus filicaudatus (Shiino, 1958) (basionym)
49. Species Pseudione foresti Bourdon, 1967 accepted as Asymmetrione foresti (Bourdon, 1968) (nomen nudum)
50. Species Pseudione fraissei Carayon, 1943 accepted as Bopyrissa fraissei (Carayon, 1943) (unaccepted > superseded combination)
51. Species Pseudione fraissei Bonnier, 1900 accepted as Bopyrissa fraissei (Carayon, 1943) (unaccepted > nomen nudum)
52. Species Pseudione furcata Richardson, 1904 accepted as Orthione furcata (Richardson, 1904) (basionym)
53. Species Pseudione giardi Calman, 1898 accepted as Eremitione giardi (Calman, 1898)
54. Species Pseudione hoylei Bonnier, 1900 accepted as Pseudione affinis (G. O. Sars, 1883) accepted as Cryptione affinis (G. O. Sars, 1882) (synonym)
55. Species Pseudione humboldtensis Pardo, Guisado & Acuña, 1998 accepted as Bathione humboldtensis (Pardo, Guisado & Acuña, 1998) (Transferred to Bathione Román-Contreras & Boyko, 2007)
56. Species Pseudione hyndmanni (Bate & Westwood, 1867) accepted as Eremitione hyndmanni (Bate & Westwood, 1867)
57. Species Pseudione indica Chopra, 1930 accepted as Cryptione indica (Chopra, 1930) (unaccepted > superseded combination)
58. Species Pseudione insignis Bonnier, 1900 accepted as Pseudione crenulata G. O. Sars, 1898 (synonym)
59. Species Pseudione kensleyi Williams & Schuerlein, 2005 accepted as Bopyrissa kensleyi (Williams & Schuerlein, 2005)
60. Species Pseudione latilamellaris Nierstrasz & Brender à Brandis, 1931 accepted as Pleurocryptella latilamellaris (Nierstrasz & Brender à Brandis, 1931) (basionym)
61. Species Pseudione lenticeps Shiino, 1958 accepted as Aporobopyrus retrorsa (Richardson, 1910) (synonym)
62. Species Pseudione magna Shiino, 1951 accepted as Cryptione magna (Shiino, 1951) (unaccepted > superseded combination)
63. Species Pseudione minimo-crenulata Nierstrasz & Brender à Brandis, 1931 accepted as Pseudione minimocrenulata Nierstrasz & Brender à Brandis, 1931 (unaccepted > misspelling - incorrect original spelling)
64. Species Pseudione nobilii Nierstrasz & Brender à Brandis, 1923 accepted as Eremitione nobilii (Nierstrasz & Brender à Brandis, 1923)
65. Species Pseudione novaeguineensis Danforth, 1971 accepted as Bopyrissa novaeguineensis (Danforth, 1971)
66. Species Pseudione orientalis Shiino, 1933 accepted as Aporobopyrus orientalis (Shiino, 1933) (basionym)
67. Species Pseudione overstreeti Adkison & Heard, 1995 accepted as Robinione overstreeti (Adkison & Heard, 1995)
68. Species Pseudione panopei Pearse, 1947 accepted as Progebiophilus upogebiae (Hay, 1917) (synonym)
69. Species Pseudione parviramus Adkison, 1988 accepted as Cryptione parviramus (Adkison, 1988) (unaccepted > superseded combination)
70. Species Pseudione paucisecta Richardson, 1904 accepted as Parione paucisecta (Richardson, 1904) (unaccepted > superseded combination)
71. Species Pseudione petrolistheae Shiino, 1933 accepted as Aporobopyrus petrolistheae (Shiino, 1933) accepted as Aporobopyrus petrolistheae petrolistheae (Shiino, 1933) (unaccepted > junior subjective synonym)
72. Species Pseudione pontocari Page, 1985 accepted as Cryptione pontocari (Page, 1985) (unaccepted > superseded combination)
73. Species Pseudione proxima Bonnier, 1900 accepted as Pseudione hyndmanni (Bate & Westwood, 1867) accepted as Eremitione hyndmanni (Bate & Westwood, 1867) (synonym)
74. Species Pseudione quasimodo Boyko & Williams, 2004 accepted as Eremitione quasimodo (Boyko & Williams, 2004)
75. Species Pseudione retrorsa Richardson, 1910 accepted as Aporobopyrus retrorsa (Richardson, 1910) (basionym)
76. Species Pseudione reverberii Restivo, 1970 accepted as Acrobelione reverberii (Restivo, 1970) (basionym)
77. Species Pseudione stylopoda Boyko, 2004 accepted as Cryptione stylopoda (Boyko, 2004) (unaccepted > superseded combination)
78. Species Pseudione tattersalli Nierstrasz & Brender à Brandis, 1923 accepted as Cryptione tattersalli (Nierstrasz & Brender à Brandis, 1923) (unaccepted > superseded combination)
79. Species Pseudione trilobata Nierstrasz & Brender à Brandis, 1925 accepted as Aporobopyrus trilobatus (Nierstrasz & Brender à Brandis, 1925) (basionym)
80. Species Pseudione tuberculata Caspers, 1939 accepted as Pseudione borealis Caspers, 1939 (synonym)
81. Species Pseudione tuberculata Richardson, 1904 accepted as Eremitione tuberculata (Richardson, 1904)
82. Species Pseudione upogebiae Hay, 1917 accepted as Progebiophilus upogebiae (Hay, 1917) (basionym)
83. Species Pseudione villosa Shiino, 1964 accepted as Progebiophilus villosus (Shiino, 1964) (basionym)

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