1. Species Diplozoon paradoxum von Nordmann, 1832
2. Subgenus Diplozoon (Paradiplozoon) Achmerow, 1974 accepted as Paradiplozoon Akhmerov, 1974 (Status raised)
   1. Species Diplozoon (Paradiplozoon) amurense Achmerov, 1974 accepted as Paradiplozoon amurense Achmerow, 1974 (Superseded combination)
   2. Species Diplozoon (Paradiplozoon) erythroculteris Achmerov, 1974 accepted as Paradiplozoon erythroculteris (Akhmerov, 1974) (Superseded combination)
   3. Species Diplozoon (Paradiplozoon) marinae Achmerov, 1974 accepted as Paradiplozoon marinae Achmerov, 1974 (Superseded combination)
   4. Species Diplozoon (Paradiplozoon) parabramidis Achmerow, 1974 accepted as Paradiplozoon parabramisi (Ling, 1973) Khotenovsky, 1985 (Synonym)
   5. Species Diplozoon (Paradiplozoon) skrjabini Akhmerov, 1974 accepted as Paradiplozoon skrjabini Akhmerov, 1974 (Superseded combination)
3. Species Diplozoon aegyptensis Fischthal & Kuntz, 1963 accepted as Paradiplozoon aegyptense (Fischthal & Kuntz, 1963) Khotenovskii, 1985 (Superseded combination)
4. Species Diplozoon agdamicum Mikailov, 1971 accepted as Paradiplozoon agdamicum (Mikailov, 1973) (Superseded combination)
5. Species Diplozoon aristichthysi Ling, 1973 accepted as Inustiatus inustiatus (Nagibina, 1965) Khotenovsky, 1978 (Synonym)
6. Species Diplozoon balleri Nagibina, Ergens & Paschkewitchute, 1970 accepted as Paradiplozoon sapae (Reichenbach-Klinke, 1961) (Synonym)
7. Species Diplozoon ballerus Komarova, 1964 accepted as Paradiplozoon sapae (Reichenbach-Klinke, 1961) (Synonym)
8. Species Diplozoon barbi Reichenbach-Klinke, 1951 accepted as Paradiplozoon barbi (Reichenbach-Klinke, 1951) Khotenovsky, 1985 (Superseded combination)
9. Species Diplozoon bergi Gavrilova, 1964 accepted as Paradiplozoon sapae (Reichenbach-Klinke, 1961) (Synonym)
10. Species Diplozoon bliccae Reichenbach-Klinke, 1961 accepted as Paradiplozoon bliccae (Reichenbach-Klinke, 1961) (unaccepted > superseded combination)
11. Species Diplozoon bychowskyi Nagibina, 1975 accepted as Sindiplozoon strelkowi (Nagibina, 1965) Khotenovsky, 1981 (Synonym)
12. Species Diplozoon capoetobrama Gavrilova, 1964 accepted as Paradiplozoon capoetobrama (Gavrilova, 1964) (Superseded combination)
13. Species Diplozoon chazarikum Mikailov, 1971 accepted as Paradiplozoon chazarikum (Mikailov, 1973) (Superseded combination)
14. Species Diplozoon ctenopharyngodoni Ling, 1973 accepted as Sindiplozoon ctenopharyngodoni (Ling, 1973) Jiang, Wu & Wang, 1989 accepted as Sindiplozoon strelkowi (Nagibina, 1965) Khotenovsky, 1981 (Superseded combination)
15. Species Diplozoon diplodiscus Nagibina, 1965 accepted as Sindiplozoon diplodiscus (Nagibina, 1965) (Superseded combination)
16. Species Diplozoon diplophyllorchidis Jiang, Wu & Wang, 1985 accepted as Paradiplozoon diplophyllorchidis (Jiang, Wu & Wang, 1985) Jiang, Wu & Wang, 1989 (unaccepted > superseded combination)
17. Species Diplozoon ergensi Pejčoch, 1968 accepted as Paradiplozoon ergensi (Pejčoch, 1968) (Superseded combination)
18. Species Diplozoon ghanense Thomas, 1957 accepted as Paradiplozoon ghanense (Thomas, 1957) (Superseded combination)
19. Species Diplozoon gobii Iksanov, 1968 (unaccepted > nomen nudum)
20. Species Diplozoon gracile Reichenbach-Klinke, 1961 accepted as Diplozoon homoion gracile (Reichenbach-Klinke, 1961) Oliver, 1973 accepted as Paradiplozoon homoion gracile (Reichenbach-Klinke, 1961) (Superseded combination)
21. Species Diplozoon gussevi Gläser, 1964 accepted as Paradiplozoon bliccae (Reichenbach-Klinke, 1961) (Synonym)
22. Species Diplozoon hemiculteri Ling, 1973 accepted as Paradiplozoon hemiculteri (Ling, 1973) Khotenovsky, 1985 (Superseded combination)
23. Species Diplozoon homoion Bychowsky & Nagibina, 1959 accepted as Paradiplozoon homoion (Bychowsky & Nagibina, 1959) (Superseded combination)
24. Species Diplozoon inustiatus Nagibina, 1965 accepted as Inustiatus inustiatus (Nagibina, 1965) Khotenovsky, 1978 (Superseded combination)
25. Species Diplozoon jiangxiensis Jiang, Wu & Wang, 1985 accepted as Paradiplozoon jiangxiense (Jiang, Wu & Wang, 1985) Jiang, Wu & Wang, 1989 (Superseded combination)
26. Species Diplozoon kasimii Rahemo, 1980 accepted as Paradiplozoon kasimii (Rahemo, 1980) (Superseded combination)
27. Species Diplozoon kovali Kolesnikova, 1965 accepted as Paradiplozoon tadzhikistanicum (Gavrilov & Dzhaliliov, 1965) (Synonym)
28. Species Diplozoon kurensis Mikailov, 1973 accepted as Paradiplozoon tadzhikistanicum (Gavrilov & Dzhaliliov, 1965) (Synonym)
29. Species Diplozoon kuthkaschenicum Mikailov, 1973 accepted as Paradiplozoon kuthkaschenicum (Mikailov, 1973) (Superseded combination)
30. Species Diplozoon markewitschi Bychowsky, Gyntovt & Koval, 1964 accepted as Paradiplozoon bliccae (Reichenbach-Klinke, 1961) (Synonym)
31. Species Diplozoon megan Bychowsky & Nagibina, 1959 accepted as Paradiplozoon megan (Bychowsky & Nagibina, 1959) Achmerov, 1974 (Superseded combination)
32. Species Diplozoon mingetschauricum Mikailov, 1973 accepted as Paradiplozoon tadzhikistanicum (Gavrilov & Dzhaliliov, 1965) (Synonym)
33. Species Diplozoon minutum Paperna, 1964 accepted as Paradiplozoon minutum (Paperna, 1964) (Superseded combination)
34. Species Diplozoon mylopharyngodonis Achmerov, 1974 accepted as Sindiplozoon diplodiscus (Nagibina, 1965) (Synonym)
35. Species Diplozoon nagibinae Gläser, 1965 accepted as Paradiplozoon nagibinae (Gläser, 1965) Khotenovsky, 1985 (Superseded combination)
36. Species Diplozoon nipponicum Goto, 1891 accepted as Sindiplozoon nipponicum (Goto, 1891) Khotenovsky, 1981 accepted as Eudiplozoon nipponicum (Goto, 1891) Khotenovsky, 1984 (Superseded combination)
37. Species Diplozoon opsariichthydis Jiang, Wu & Wang, 1984 accepted as Paradiplozoon opsariichthydis (Jiang, Wu & Wang, 1984) Jiang, Wu & Wang, 1989 (Superseded combination)
38. Species Diplozoon parabramisi Ling, 1973 accepted as Paradiplozoon parabramisi (Ling, 1973) Khotenovsky, 1985 (Superseded combination)
39. Species Diplozoon pavlovskii Bychowsky & Nagibina, 1959 accepted as Paradiplozoon pavlovskii (Bychowsky & Nagibina, 1959) Khotenovsky, 1985 (Superseded combination)
40. Species Diplozoon persicum Mikailov, 1973 accepted as Paradiplozoon bliccae (Reichenbach-Klinke, 1961) (Synonym)
41. Species Diplozoon rutili Gläser, 1967 accepted as Paradiplozoon rutili (Gläser, 1967) (Superseded combination)
42. Species Diplozoon sapa Mikailov, 1973 accepted as Paradiplozoon sapae (Reichenbach-Klinke, 1961) (Synonym)
43. Species Diplozoon scardinii Komarova, 1966 accepted as Paradiplozoon homoion (Bychowsky & Nagibina, 1959) (Synonym)
44. Species Diplozoon schizothorazi Iksanov, 1965 accepted as Paradiplozoon schizothorazi (Iksanov, 1965) (Superseded combination)
45. Species Diplozoon schulmani Mikailov, 1973 accepted as Paradiplozoon schulmani (Mikailov, 1973) (Superseded combination)
46. Species Diplozoon strelkowi Nagibina, 1965 accepted as Sindiplozoon strelkowi (Nagibina, 1965) Khotenovsky, 1981 (Superseded combination)
47. Species Diplozoon tadzhikistanicum Gavrilov & Dzhaliliov, 1965 accepted as Paradiplozoon tadzhikistanicum (Gavrilov & Dzhaliliov, 1965) (Superseded combination)
48. Species Diplozoon varicorhini Mikailov, 1973 accepted as Paradiplozoon tadzhikistanicum (Gavrilov & Dzhaliliov, 1965) (Synonym)
49. Species Diplozoon vojteki Pejčoch, 1968 accepted as Paradiplozoon vojteki (Pejčoch, 1968) (Superseded combination)
50. Species Diplozoon zeller Gyntovt, 1967 accepted as Paradiplozoon zeller (Gyntovt, 1967) (Superseded combination)
51. Species Diplozoon kashmirensis Kaw, 1950 (uncertain)

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