1. Species Contracaecum anasi Mawson, 1956
2. Species Contracaecum australe Garbin, Mattiucci, Paoletti, González-Acuña & Nascetti, 2011
3. Species Contracaecum bancrofti Johnston & Mawson, 1941
4. Species Contracaecum bioccai Mattiucci, Paoletti, Olivero-Verbel, Baldiris, Arroyo-Salgado & Garbin, 2008
5. Species Contracaecum chubutense Garbin, Diaz, Cremonte & Navone, 2008
6. Species Contracaecum eudyptes Johnston & Mawson, 1953
7. Species Contracaecum eudyptulae Johnston & Mawson, 1942
8. Species Contracaecum fagerholmi D'Amelio, Cavallero, Dronen, Barros & Paggi, 2012
9. Species Contracaecum gibsoni Mattiucci, Paoletti, Solorzano & Nascetti, 2010
10. Species Contracaecum heardi Mawson, 1953
11. Species Contracaecum himeu Yamaguti, 1941
12. Species Contracaecum magnipapillatum Chapin, 1925
13. Species Contracaecum margolisi Mattiuci, Cianchi, Paggi, Sardella, Timi, Webb, Bastida, Rodriguez & Bullini, 2003
14. Species Contracaecum matwejewi Layman & Mudrezova, 1926
15. Species Contracaecum microcephalum (Rudolphi, 1809) Baylis, 1920
16. Species Contracaecum micropapillatum (Stossich, 1890) Baylis, 1920
17. Species Contracaecum mirounga Nikolskij, 1974
18. Species Contracaecum mulli (Wedl, 1855)
19. Species Contracaecum multipapillatum (Drasche, 1882) Lucker, 1941
20. Species Contracaecum ogmorhini Johnston & Mawson, 1941
21. Species Contracaecum oschmarini Mozgovoi, 1950
22. Species Contracaecum osculatum (Rudolphi, 1802) Baylis, 1920
23. Species Contracaecum ovale (Linstow, 1907) Baylis, 1920
24. Species Contracaecum overstreeti Mattiucci, Paoletti, Solorzano & Nascetti, 2010
25. Species Contracaecum papilligerum (Creplin, 1846)
26. Species Contracaecum pelagicum Johnston & Mawson, 1942
27. Species Contracaecum plagiaticium Lent & Freitas, 1948
28. Species Contracaecum praestriatum Monnig, 1923
29. Species Contracaecum prevosti Tchéprakoff, 1966
30. Species Contracaecum qudripapillatum Saad, Younis & Rabei, 2018
31. Species Contracaecum radiatum (Linstow, 1907) Baylis, 1920
32. Species Contracaecum rectangulum (von Linstow, 1907)
33. Species Contracaecum rodhaini (Gedoelst, 1916)
34. Species Contracaecum rudolphii Hartwich, 1964
35. Species Contracaecum scotti (Leiper & Atkinson, 1914)
36. Species Contracaecum septentrionale Kreis, 1955
37. Species Contracaecum sinulabiatum Johnston & Mawson, 1941
38. Species Contracaecum turgidum Chapin, 1925
39. Species Contracaecum umiu Yamaguti, 1941
40. Species Contracaecum variegatum (Rudolphi, 1809)
41. Subgenus Contracaecum (Simplexinema) Kreis, 1952 accepted as Hysterothylacium Ward & Magath, 1917 (unaccepted > junior subjective synonym)
42. Species Contracaecum aduncum (Rudolphi, 1802) accepted as Hysterothylacium aduncum (Rudolphi, 1802) Deardorff & Overstreet, 1981 (Superseded combination)
43. Species Contracaecum amoyense Hsu, 1933 accepted as Hysterothylacium amoyense (Hsü, 1933) Deardorff & Overstreet, 1980
44. Species Contracaecum antarctica Johnston, 1938 accepted as Contracaecum osculatum (Rudolphi, 1802) Baylis, 1920 (unaccepted > junior subjective synonym)
45. Species Contracaecum arii Yamaguti, 1954 accepted as Hysterothylacium arii (Yamaguti, 1954)
46. Species Contracaecum benimasu Fujita, 1932 accepted as Hysterothylacium aduncum (Rudolphi, 1802) Deardorff & Overstreet, 1981 (Synonym)
47. Species Contracaecum chubutensis Garbin, Diaz, Cremonte & Navone, 2008 accepted as Contracaecum chubutense Garbin, Diaz, Cremonte & Navone, 2008 (Malformed suffix)
48. Species Contracaecum clavatum (Rudolphi, 1809) Baylis, 1920 accepted as Hysterothylacium clavatum (Rudolphi, 1809) accepted as Hysterothylacium aduncum (Rudolphi, 1802) Deardorff & Overstreet, 1981 (Superseded combination)
49. Species Contracaecum collare (Cobb, 1929) accepted as Hysterothylacium collare (Cobb, 1929) (Superseded combination)
50. Species Contracaecum corderoi Lent & Freitas, 1948 accepted as Contracaecum ogmorhini Johnston & Mawson, 1941 (Synonym)
51. Species Contracaecum crassicaudatum Fujita, 1939 accepted as Hysterothylacium aduncum (Rudolphi, 1802) Deardorff & Overstreet, 1981 (Synonym)
52. Species Contracaecum diomedeae (Linstow, 1888) accepted as Anisakis diomedeae (Linstow)
53. Species Contracaecum elongatum Fujita, 1939 accepted as Hysterothylacium aduncum (Rudolphi, 1802) Deardorff & Overstreet, 1981 (Synonym)
54. Species Contracaecum engraulisi Gupta & Srivastava, 1984 accepted as Hysterothylacium engraulisi (Gupta & Srivastava, 1984) (Superseded combination)
55. Species Contracaecum equulai Gupta & Srivastava, 1984 accepted as Hysterothylacium equulai (Gutpa & Srivastava, 1984) (Superseded combination)
56. Species Contracaecum fabri (Rudolphi, 1819) Baylis, 1923 accepted as Hysterothylacium fabri (Rudolphi, 1819) Deardorff & Overstreet, 1980 (Superseded combination)
57. Species Contracaecum falcigerum (Railliet & Henry, 1907) Baylis, 1920 accepted as Contracaecum radiatum (Linstow, 1907) Baylis, 1920 (Synonym)
58. Species Contracaecum hippoglossi Fujita, 1932 accepted as Hysterothylacium aduncum (Rudolphi, 1802) Deardorff & Overstreet, 1981 (Synonym)
59. Species Contracaecum histiophori Yamaguti, 1935 accepted as Hysterothylacium histiophori (Yamaguti, 1935) Deardorff & Overstreet, 1981
60. Species Contracaecum hypomesi Fujita, 1932 accepted as Hysterothylacium aduncum (Rudolphi, 1802) Deardorff & Overstreet, 1981 (Synonym)
61. Species Contracaecum incurvum (Rudolphi, 1819) Baylis & Daubney, 1922 accepted as Hysterothylacium incurvum (Rudolphi, 1819) Deardorff & Overstreet, 1980 (Superseded combination)
62. Species Contracaecum lophii Schuurmans-Stekhoven, 1935 accepted as Hysterothylacium rigidum (Rudolphi, 1809) Deardorff & Overstreet, 1980 (Synonym)
63. Species Contracaecum magnicollare Johnston & Mawson, 1941 accepted as Contracaecum magnipapillatum Chapin, 1925 (unaccepted > junior subjective synonym)
64. Species Contracaecum megacephalum Oshmarin, 1963 accepted as Iheringascaris inquies (Linton, 1901) Deardorff & Overstreet, 1980 (Probable synonym)
65. Species Contracaecum mesopi Fujita, 1940 accepted as Hysterothylacium aduncum (Rudolphi, 1802) Deardorff & Overstreet, 1981 (Synonym)
66. Species Contracaecum multipapillatum_A of Nascetti et al. (1990) accepted as Contracaecum gibsoni Mattiucci, Paoletti, Solorzano & Nascetti, 2010 (unaccepted > junior subjective synonym)
67. Species Contracaecum multipapillatum_B of Nascetti et al. (1990) accepted as Contracaecum overstreeti Mattiucci, Paoletti, Solorzano & Nascetti, 2010 (unaccepted > junior subjective synonym)
68. Species Contracaecum muraenesoxin Luo, 1999 accepted as Hysterothylacium muraenesoxin (Luo, 1999) Li, Xu, Li & Zhang, 2006 accepted as Hysterothylacium amoyense (Hsü, 1933) Deardorff & Overstreet, 1980 (Synonym)
69. Species Contracaecum nehli Karokhin, 1949 accepted as Contracaecum ovale (Linstow, 1907) Baylis, 1920 (unaccepted > junior subjective synonym, Synonym)
70. Species Contracaecum ochotense Fujita, 1932 accepted as Hysterothylacium aduncum (Rudolphi, 1802) Deardorff & Overstreet, 1981 (Synonym)
71. Species Contracaecum oshoroensis Fujita, 1940 accepted as Hysterothylacium aduncum (Rudolphi, 1802) Deardorff & Overstreet, 1981 (Synonym)
72. Species Contracaecum robustum Chandler, 1935 accepted as Contracaecum multipapillatum (Drasche, 1882) Lucker, 1941 (Synonym)
73. Species Contracaecum rudolphii_D of Shamsi, Norman, Gasser & Beveridge (2009) (unaccepted > unavailable name)
74. Species Contracaecum rudolphii_E of Shamsi, Norman, Gasser & Beveridge (2009) (unaccepted > unavailable name)
75. Species Contracaecum rudolphii_F of D'Amelio, Cavallero, Dronen, Barros & Paggi (2012) (unaccepted > unavailable name)
76. Species Contracaecum scombricum (Dujardin, 1845) (unaccepted > nomen nudum)
77. Species Contracaecum siluriglanidis (Linstow, 1883) Shevchenko, 1956 accepted as Contracaecum rudolphii Hartwich, 1964 (unaccepted > junior subjective synonym)
78. Species Contracaecum spheniscus Boreo & Led, 1970 accepted as Contracaecum pelagicum Johnston & Mawson, 1942 (Synonym)
79. Species Contracaecum spheniscus Johnston & Mawson, 1942 accepted as Contracaecum spheniscus Boreo & Led, 1970 accepted as Contracaecum pelagicum Johnston & Mawson, 1942 (unaccepted > misspelling - incorrect subsequent spelling)
80. Species Contracaecum spiculigerum (Rudolphi, 1809) Railliet & Henry, 1912 accepted as Contracaecum rudolphii Hartwich, 1964 (Synonym - renamed rudolphii)
81. Species Contracaecum zenis Baylis, 1929 accepted as Hysterothylacium zenis (Baylis, 1929) Deardorff & Overstreet, 1980 (Superseded combination)
82. Species Contracaecum zenopsis Yamaguti, 1941 accepted as Hysterothylacium zenopsis (Yamaguti, 1941) Deardorff & Overstreet, 1980 accepted as Hysterothylacium zenis (Baylis, 1929) Deardorff & Overstreet, 1980 (Superseded combination)
83. Species Contracaecum ballistis (Linstow, 1905) Baylis, 1936 (uncertain > nomen dubium)
84. Species Contracaecum brevicaecum Khan & Yaseen, 1969 (uncertain > nomen dubium)
85. Species Contracaecum brevispiculum Khan & Yaseen, 1969 (uncertain > taxon inquirendum)
86. Species Contracaecum clelandi Johnston & Mawson, 1941 (uncertain > nomen dubium)
87. Species Contracaecum collieri Chandler, 1935 (uncertain > taxon inquirendum)
88. Species Contracaecum filiforme (Stossich, 1904) (uncertain > taxon inquirendum)
89. Species Contracaecum longicaecum Schuurmans Stekhoven, 1952 (uncertain > taxon inquirendum)
90. Species Contracaecum osmanovi Mozgovoi, 1951 (uncertain > nomen dubium)
91. Species Contracaecum pedum (Deslongchamps, 1824) (uncertain > nomen dubium)
92. Species Contracaecum plagiostomorum (Linstow, 1905) Baylis, 1936 (uncertain > nomen dubium)
93. Species Contracaecum taii Fujita, 1932 (uncertain > taxon inquirendum)
94. Species Contracaecum vittatii Khan & Begum, 1971 (uncertain > nomen dubium)

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