1. Genus Atreta Etallon, 1861 †
   1. Species Atreta blandina (A. d'Orbigny, 1850) †
   2. Species Atreta intulaevis Tashiro, 1978 †
   3. Species Atreta redunca Kendrick & Vartak, 2007 †
   4. Species Atreta richthofeni (Bittner, 1895) †
   5. Species Atreta schlumbergeri (Munier-Chalmas, 1886) †
   6. Species Atreta subrichthofeni (Krumbeck, 1924) †
2. Genus Basiliomya Bayer, 1971
   1. Species Basiliomya goreaui Bayer, 1971
3. Genus Dimya Rouault, 1850
   1. Species Dimya akasakiensis Tashiro & Otsuka, 1980 †
   2. Species Dimya alleni H. E. Vokes, 1979 †
   3. Species Dimya argentea Dall, 1886
   4. Species Dimya bonneti Cossmann, 1902 †
   5. Species Dimya californiana S. S. Berry, 1936
   6. Species Dimya corrugata Hedley, 1902
   7. Species Dimya crearoi Oppenheim, 1900 †
   8. Species Dimya deshayesiana Rouault, 1850 †
   9. Species Dimya fimbricostata H. E. Vokes, 1979
   10. Species Dimya fragilis Koenen, 1893 †
       1. Subspecies Dimya fragilis crassiplicata Sacco, 1897 † accepted as Dimya tenuiplicata (G. Seguenza, 1879) †
       2. Subspecies Dimya fragilis miopliocenica Sacco, 1897 † accepted as Dimya tenuiplicata (G. Seguenza, 1879) †
   11. Species Dimya grandis Dall, 1896 †
       1. Subspecies Dimya grandis divaricata Dall, 1896 † accepted as Dimya grandis Dall, 1896 † (unaccepted > junior subjective synonym)
       2. Variety Dimya grandis var. divaricata Dall, 1896 † accepted as Dimya grandis Dall, 1896 † (unaccepted > junior subjective synonym)
   12. Species Dimya hohndorfi Welle, 1998 †
   13. Species Dimya japonica Habe, 1971
   14. Species Dimya lima Bartsch, 1913
   15. Species Dimya maoria A. W. B. Powell, 1937
   16. Species Dimya mimula Dall, Bartsch & Rehder, 1938
   17. Species Dimya pamplonensis (Carez, 1881) †
   18. Species Dimya plana (K. Martin, 1885) †
   19. Species Dimya rahkiensis Eames, 1951 †
   20. Species Dimya raulini Cossmann & Peyrot, 1914 †
   21. Species Dimya rufaripa H. E. Vokes, 1979 †
   22. Species Dimya sigillata Tate, 1886 †
   23. Species Dimya spondyliformis Eames, 1951 †
   24. Species Dimya tenuiplicata (G. Seguenza, 1879) †
   25. Species Dimya tigrina Bayer, 1971
   26. Species Dimya westonensis P. A. Maxwell, 1978 †
   27. Subgenus Dimya (Dimyodon) Munier-Chalmas, 1886 † accepted as Atreta Etallon, 1861 † (unaccepted > junior subjective synonym)
       1. Species Dimya (Dimyodon) schlumbergeri Munier-Chalmas, 1886 † accepted as Atreta schlumbergeri (Munier-Chalmas, 1886) † (unaccepted > superseded combination)
   28. Species Dimya acuminata Esteves, 1984 accepted as Dimya fimbricostata H. E. Vokes, 1979
   29. Species Dimya argentata Habe, 1951 accepted as Dimya filipina Bartsch, 1913
   30. Species Dimya coralliotis S. S. Berry, 1944 accepted as Dimya californiana S. S. Berry, 1936
   31. Species Dimya dissimilis Tate, 1886 † accepted as Neoatreta dissimilis (Tate, 1886) † (unaccepted > superseded combination)
   32. Species Dimya extenuiplicata Sacco, 1897 † accepted as Dimya tenuiplicata (G. Seguenza, 1879) †
   33. Species Dimya filipina Bartsch, 1913 accepted as Neoatreta filipina (Bartsch, 1913)
   34. Species Dimya kaiparaensis Laws, 1944 † accepted as Neoatreta kaiparaensis (Laws, 1944) † (superseded combination)
   35. Species Dimya lima Bartsch, 1913 sensu Habe, 1958 accepted as Dimya japonica Habe, 1971 (misapplication)
   36. Species Dimya molokaia Dall, Bartsch & Rehder, 1938 accepted as Dimyella molokaia (Dall, Bartsch & Rehder, 1938)
   37. Species Dimya radiata Kuroda, 1928 accepted as Neoatreta filipina (Bartsch, 1913)
       1. Subspecies Dimya radiata takii Kuroda, 1932 accepted as Neoatreta filipina (Bartsch, 1913)
   38. Species Dimya richei Doncieux, 1911 † accepted as Dimya pamplonensis (Carez, 1881) †
4. Genus Dimyella Moore, 1970
   1. Species Dimyella malnatrensis (Corselli & Bernocchi, 1992) †
   2. Species Dimyella molokaia (Dall, Bartsch & Rehder, 1938)
   3. Species Dimyella similis (Koenen, 1893) †
   4. Species Dimyella starcki D. R. Moore, 1970
5. Genus Diploschiza Conrad, 1866 †
   1. Species Diploschiza cretacea Conrad, 1866 †
6. Genus Neoatreta T. R. Waller, 2012
   1. Species Neoatreta dissimilis (Tate, 1886) †
   2. Species Neoatreta filipina (Bartsch, 1913)
   3. Species Neoatreta kaiparaensis (Laws, 1944) †
   4. Species Neoatreta phaidra (Woodring, 1982) †
   5. Species Neoatreta plana (K. Martin, 1885) †
7. Genus Cyclostreon Eichwald, 1868 † accepted as Atreta Etallon, 1861 †
8. Genus Deuteromya Cossmann, 1903 accepted as Dimya Rouault, 1850 (unnecessary substitute name for Dimya Rouault, 1850)
9. Genus Dimyarina Iredale, 1936 accepted as Dimya Rouault, 1850 (synonym)
   1. Species Dimyarina maoria (A. W. B. Powell, 1937) accepted as Dimya maoria A. W. B. Powell, 1937 (superseded combination)
10. Genus Dimyodon Munier-Chalmas, 1886 † accepted as Atreta Etallon, 1861 † (unaccepted > junior subjective synonym)
    1. Species Dimyodon dissimilis (Tate, 1886) † accepted as Neoatreta dissimilis (Tate, 1886) † (unaccepted > superseded combination)
    2. Species Dimyodon richthofeni Bittner, 1895 † accepted as Atreta richthofeni (Bittner, 1895) † (unaccepted > superseded combination)
    3. Species Dimyodon subrichthofeni Krumbeck, 1924 † accepted as Atreta subrichthofeni (Krumbeck, 1924) † (unaccepted > superseded combination)
11. Genus Dimyopsis Bittner, 1895 † accepted as Atreta Etallon, 1861 †
12. Genus Emiliomya Corselli & Bernocchi, 1992 accepted as Dimyella Moore, 1970

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