1. Species Mohnia abyssorum (P. Fischer, 1884)
2. Species Mohnia blakei (A. E. Verrill, 1885)
3. Species Mohnia carolinensis (A. E. Verrill, 1884)
4. Species Mohnia dalli (Friele, 1881)
5. Species Mohnia danielsseni (Friele, 1879)
6. Species Mohnia krampi (Thorson, 1951)
7. Species Mohnia mohni (Friele, 1877)
8. Species Mohnia parva (A. E. Verrill & S. Smith, 1882)
9. Species Mohnia simplex (A. E. Verrill, 1884)
10. Subgenus Mohnia (Tacita) Lus, 1971 accepted as Tacita Lus, 1971 accepted as Bayerius Olsson, 1971
    1. Species Mohnia (Tacita) blakei (A. E. Verrill, 1885) accepted as Mohnia blakei (A. E. Verrill, 1885) (unaccepted > superseded combination)
11. Species Mohnia attenuata A. N. Golikov & Gulbin, 1977 accepted as Retifusus attenuatus (A. N. Golikov & Gulbin, 1977) (original combination)
12. Species Mohnia bella (Ozaki, 1958) accepted as Retimohnia bella (Ozaki, 1958)
13. Species Mohnia buccinoides Dall, 1913 accepted as Retifusus buccinoides (Dall, 1913) (original combination)
14. Species Mohnia caelata (A. E. Verrill, 1880) accepted as Retimohnia caelata (A. E. Verrill, 1880)
15. Species Mohnia clarki Dall, 1907 accepted as Retimohnia clarki (Dall, 1907) (original combination)
16. Species Mohnia corbis Dall, 1913 accepted as Fusipagoda corbis (Dall, 1913) (original combination)
17. Species Mohnia daphnelloides Okutani, 1964 accepted as Retifusus daphnelloides (Okutani, 1964) (original combination)
18. Species Mohnia exquisita Dall, 1913 accepted as Fusipagoda exquisita (Dall, 1913) (original combination)
19. Species Mohnia frielei Dall, 1891 accepted as Retimohnia frielei (Dall, 1891) (unaccepted > superseded combination, original combination)
20. Species Mohnia glypta (A. E. Verrill, 1882) accepted as Retimohnia glypta (A. E. Verrill, 1882) (unaccepted > superseded combination)
21. Species Mohnia hondoensis Dall, 1913 accepted as Retimohnia hondoensis (Dall, 1913) (original combination)
22. Species Mohnia iturupa A. N. Golikov & Sirenko, 1998 accepted as Retifusus iturupus (A. N. Golikov & Sirenko, 1998) (unaccepted > superseded combination)
23. Species Mohnia iwateana Tiba, 1981 accepted as Retimohnia bella (Ozaki, 1958)
24. Species Mohnia japonica Dall, 1913 accepted as Retimohnia micra (Dall, 1907)
25. Species Mohnia kaicherae Petuch, 1987 accepted as Manaria fusiformis (Clench & Aguayo, 1941)
26. Species Mohnia kurilana Dall, 1913 accepted as Pseudomohnia kurilana (Dall, 1913) (original combination)
27. Species Mohnia micra Dall, 1907 accepted as Retimohnia micra (Dall, 1907) (original combination)
28. Species Mohnia multicostata T. Habe & Ki. Ito, 1965 accepted as Retimohnia bella (Ozaki, 1958) (unaccepted > junior subjective synonym)
29. Species Mohnia okhotskana Tiba, 1981 accepted as Retifusus olivaceus (Bartsch, 1929)
30. Species Mohnia robusta Dall, 1913 accepted as Retimohnia robusta (Dall, 1913) (original combination)
31. Species Mohnia similis A. N. Golikov & Gulbin, 1977 accepted as Retifusus similis (A. N. Golikov & Gulbin, 1977) (original combination)
32. Species Mohnia siphonoides Dall, 1913 accepted as Latisipho siphonoides (Dall, 1913) (original combination)
33. Species Mohnia sordida Dall, 1907 accepted as Retimohnia sordida (Dall, 1907) (original combination)
34. Species Mohnia tenuis (Okutani, 1966) accepted as Pararetifusus tenuis (Okutani, 1966) (unaccepted > superseded combination)
35. Species Mohnia toyamana Tiba, 1981 accepted as Retifusus toyamanus (Tiba, 1981) (original combination)
36. Species Mohnia vernalis Dall, 1913 accepted as Retimohnia vernalis (Dall, 1913) (original combination)
37. Species Mohnia virens (Dall, 1877) accepted as Retifusus virens (Dall, 1877) (unaccepted > superseded combination)
38. Species Mohnia yanamii (Yokoyama, 1926) accepted as Retifusus virens (Dall, 1877)

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