1. Species Septifer bilocularis (Linnaeus, 1758)
2. Species Septifer cumingii Récluz, 1849
3. Species Septifer dronovi Repin, 2001 †
4. Species Septifer excisus (Wiegmann, 1837)
5. Species Septifer fenestratus Tate, 1886 †
6. Species Septifer huttoni (Cossmann, 1916) †
7. Species Septifer lingua (K. Martin, 1879) †
8. Species Septifer oblitus (Michelotti, 1847) †
9. Species Septifer pissarroi Le Renard, 1994 †
10. Species Septifer ramulosus (Viader, 1951)
11. Species Septifer rudis Dall, Bartsch & Rehder, 1938
12. Species Septifer rufolineatus (E. A. Smith, 1911)
13. Species Septifer serratus (Melleville, 1843) †
14. Species Septifer subfenestratus Basedow, 1904 †
15. Species Septifer torquatus (P. Marshall, 1918) †
16. Species Septifer zeteki Hertlein & A. M. Strong, 1946
17. Species Septifer australis Laseron, 1956 accepted as Septifer cumingii Récluz, 1849 (junior subjective synonym)
18. Species Septifer bifurcatus (Conrad, 1837) accepted as Mytilisepta bifurcata (Conrad, 1837) (unaccepted combination)
19. Species Septifer bisculpturata Barnard, 1964 accepted as Septifer bisculpturatus Barnard, 1964 accepted as Septifer ramulosus (Viader, 1951) (incorrect grammatical agreement of specific epithet)
20. Species Septifer bisculpturatus Barnard, 1964 accepted as Septifer ramulosus (Viader, 1951)
21. Species Septifer bryanae (Pilsbry, 1921) accepted as Septifer cumingii Récluz, 1849 (junior subjective synonym)
22. Species Septifer crassus Dunker, 1853 accepted as Mytilisepta virgata (Wiegmann, 1837)
23. Species Septifer cumingi [sic] accepted as Septifer cumingii Récluz, 1849 (misspelling)
24. Species Septifer forskali [sic] accepted as Septifer cumingii Récluz, 1849 (misspelling)
25. Species Septifer forskalii Dunker, 1855 accepted as Septifer cumingii Récluz, 1849 (junior subjective synonym)
26. Species Septifer furcillata A. Gould, 1861 accepted as Septifer cumingii Récluz, 1849 (junior subjective synonym)
27. Species Septifer fuscus Récluz, 1848 accepted as Septifer excisus (Wiegmann, 1837)
28. Species Septifer herrmannseni Dunker, 1853 accepted as Mytilisepta virgata (Wiegmann, 1837)
29. Species Septifer keenae Nomura, 1936 accepted as Mytilisepta keenae (Nomura, 1936)
30. Species Septifer keeni Nomura, 1936 accepted as Septifer keenae Nomura, 1936 accepted as Mytilisepta keenae (Nomura, 1936) (incorrect original spelling)
31. Species Septifer pulcher Z.-R. Wang, 1983 accepted as Septifer cumingii Récluz, 1849 (junior subjective synonym)
32. Species Septifer tegulatus (J. Müller, 1847) † accepted as Cuneolus tegulatus (J. Müller, 1847) † (unaccepted > superseded combination)
33. Species Septifer troschelii Dunker, 1853 accepted as Septifer excisus (Wiegmann, 1837)
34. Species Septifer vaughani Dall, Bartsch & Rehder, 1938 accepted as Septifer excisus (Wiegmann, 1837)
35. Species Septifer virgatus (Wiegmann, 1837) accepted as Mytilisepta virgata (Wiegmann, 1837)
36. Species Septifer xishaensis Z.-R. Wang, 1983 accepted as Septifer rudis Dall, Bartsch & Rehder, 1938 (junior subjective synonym)
37. Species Septifer cornutus Cossmann, 1896 † (uncertain > unassessed)
38. Species Septifer furcatus Dunker, 1855 (uncertain > nomen dubium)
39. Species Septifer grayanus Dunker, 1855 (uncertain > nomen dubium)

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