1. Species Prosthiostomum acroporae (Rawlinson, Gillis, Billings & Borneman, 2011)
2. Species Prosthiostomum amri Rodriguez, Hutchings & Williamson, 2021
3. Species Prosthiostomum asiaticum Kato, 1937
4. Species Prosthiostomum aurantiacum (Collingwood, 1876)
5. Species Prosthiostomum awaensa Yeri & Kaburaki, 1918
6. Species Prosthiostomum capense Bock, 1931
7. Species Prosthiostomum collare (Stimpson, 1855)
8. Species Prosthiostomum collaris (Stimpson, 1855)
9. Species Prosthiostomum constipatum Stimpson, 1857
10. Species Prosthiostomum cooperi Laidlaw, 1902
11. Species Prosthiostomum crassiusculum Stimpson, 1857
12. Species Prosthiostomum cribrarium Stimpson, 1857
13. Species Prosthiostomum cyclops (Verrill, 1901)
14. Species Prosthiostomum cynarium Marcus, 1950
15. Species Prosthiostomum dohrni Lang, 1884
16. Species Prosthiostomum dohrnii Lang, 1884
17. Species Prosthiostomum elegans Laidlaw, 1902
18. Species Prosthiostomum formosum Kato, 1943
19. Species Prosthiostomum gilvum Marcus, 1950
20. Species Prosthiostomum grande Stimpson, 1857
21. Species Prosthiostomum griseum Hyman, 1959
22. Species Prosthiostomum huidongense Liu, 2024
23. Species Prosthiostomum komaii Kato, 1944
24. Species Prosthiostomum latocelis Hyman, 1953
25. Species Prosthiostomum lineatum Meixner, 1907
26. Species Prosthiostomum lobatum Pearse, 1938
27. Species Prosthiostomum macrorhynchum (Schmarda, 1859)
28. Species Prosthiostomum maculatum Haswell, 1907
29. Species Prosthiostomum marmoratum Yeri & Kaburaki, 1918
30. Species Prosthiostomum milcum Marcus & Marcus, 1968
31. Species Prosthiostomum montiporae Poulter, 1975
32. Species Prosthiostomum multicelis Hyman, 1953
33. Species Prosthiostomum nationale Plehn, 1896
34. Species Prosthiostomum notoensis Kato, 1944
35. Species Prosthiostomum nozakensis Kato, 1944
36. Species Prosthiostomum obscurum (Stimpson, 1855)
37. Species Prosthiostomum ohshimae (Kato, 1938)
38. Species Prosthiostomum ostreae Kato, 1937
39. Species Prosthiostomum pallidum Laidlaw, 1903
40. Species Prosthiostomum parvicelis Hyman, 1939
41. Species Prosthiostomum pellucidum (Grube, 1840)
42. Species Prosthiostomum purum Kato, 1937
43. Species Prosthiostomum rubropunctatum Yeri & Kaburaki, 1918
44. Species Prosthiostomum sadoensis Kato, 1944
45. Species Prosthiostomum sancum Du Bois-Reymond Marcus, 1965
46. Species Prosthiostomum siphunculus (Delle Chiaje, 1822)
47. Species Prosthiostomum sonorum Kato, 1938
48. Species Prosthiostomum sparsum (Stimpson, 1855)
49. Species Prosthiostomum suzakiensis Kato, 1944
50. Species Prosthiostomum tenebrosum Stimpson, 1857
51. Species Prosthiostomum torquatum Tsuyuki, Oya & Kajihara, 2019
52. Species Prosthiostomum trilineatum Yeri & Kaburaki, 1920
53. Species Prosthiostomum utarum Marcus, 1952
54. Species Prosthiostomum vulgare Kato, 1938
55. Species Prosthiostomum wagurensis Kato, 1944
56. Species Prosthiostomum yeri Kato, 1937
57. Species Prosthiostomum affine Stimpson, 1857 accepted as Prosthiostomum grande Stimpson, 1857
58. Species Prosthiostomum angustum Bock, 1913 accepted as Euprosthiostomum angustum (Bock, 1913)
59. Species Prosthiostomum arctum Quatrefage, 1845 accepted as Prosthiostomum siphunculus (Delle Chiaje, 1822)
60. Species Prosthiostomum auratum (Kato, 1937) accepted as Prosthiostomum siphunculus (Delle Chiaje, 1822)
61. Species Prosthiostomum auratum Kato, 1937 accepted as Prosthiostomum arctum Quatrefage, 1845 accepted as Prosthiostomum siphunculus (Delle Chiaje, 1822)
62. Species Prosthiostomum awaense Yeri & Kaburaki, 1918 accepted as Prosthiostomum awaensa Yeri & Kaburaki, 1918
63. Species Prosthiostomum bellum Kato, 1939 accepted as Euprosthiostomum bellum (Kato, 1939)
64. Species Prosthiostomum delicatum Palombi, 1939 accepted as Enchiridium delicatum (Palombi, 1939)
65. Species Prosthiostomum drygalskii Bock, 1931 accepted as Lurymare drygalski (Bock, 1913)
66. Species Prosthiostomum elongatum Quatrefage, 1845 accepted as Prosthiostomum siphunculus (Delle Chiaje, 1822)
67. Species Prosthiostomum emarginatum Leuckart, 1863 accepted as Prosthiostomum siphunculus (Delle Chiaje, 1822)
68. Species Prosthiostomum exiguum Hyman, 1959 accepted as Euprosthiostomum exiguum (Hyman, 1959)
69. Species Prosthiostomum gabriellae Marcus, 1949 accepted as Enchiridium gabriellae (Marcus, 1949)
70. Species Prosthiostomum gracile Girard, 1853 accepted as Euplana gracilis Girard, 1853
71. Species Prosthiostomum hamatum Schmidt, 1861 accepted as Prosthiostomum siphunculus (Delle Chiaje, 1822)
72. Species Prosthiostomum katoi Poulter, 1975 accepted as Lurymare katoi Poulter, 1975
73. Species Prosthiostomum laetum Kato, 1938 accepted as Euprosthiostomum laetum (Kato, 1938)
74. Species Prosthiostomum matarazzoi Marcus, 1950 accepted as Euprosthiostomum matarazzoi (Marcus, 1950)
75. Species Prosthiostomum molle Freeman, 1930 accepted as Euprosthiostomum molle (Freeman, 1930)
76. Species Prosthiostomum monosorum (Schmarda, 1859) accepted as Lurymare monosorum (Schmarda, 1859)
77. Species Prosthiostomum nationalis Plehn, 1896 accepted as Prosthiostomum nationale Plehn, 1896
78. Species Prosthiostomum pulchrum Bock, 1913 accepted as Euprosthiostomum pulchrum (Bock, 1913)
79. Species Prosthiostomum russoi Palombi, 1939 accepted as Enchiridium russoi (Palombi, 1939)
80. Species Prosthiostomum singulare Laidlaw, 1904 accepted as Lurymare singulare (Laidlaw, 1904)
81. Species Prosthiostomum vulgaris Kato, 1938 accepted as Prosthiostomum vulgare Kato, 1938
82. Species Prosthiostomum wagurenisis Kato, 1944 accepted as Prosthiostomum wagurensis Kato, 1944
83. Species Prosthiostomum yerii Kato, 1937 accepted as Prosthiostomum yeri Kato, 1937

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