1. Genus Cyamiocardium T. Soot-Ryen, 1951
   1. Species Cyamiocardium chuanisinense Urcola & Zelaya, 2018
   2. Species Cyamiocardium crassilabrum Dell, 1964
   3. Species Cyamiocardium dahli T. Soot-Ryen, 1957
   4. Species Cyamiocardium denticulatum (E. A. Smith, 1907)
   5. Species Cyamiocardium domaneschii Passos & Machado, 2014
   6. Species Cyamiocardium fragillimum (Thiele, 1912)
   7. Species Cyamiocardium namuncurense Urcola & Zelaya, 2018
   8. Species Cyamiocardium rotundatum (Thiele, 1912)
   9. Species Cyamiocardium yeskumaala Urcola & Zelaya, 2018
2. Genus Cyamiomactra F. Bernard, 1897
   1. Species Cyamiomactra balaustina (A. Gould, 1861)
   2. Species Cyamiomactra chilensis Ramorino, 1968
   3. Species Cyamiomactra distorta Laseron, 1953
   4. Species Cyamiomactra falklandica Dell, 1964
   5. Species Cyamiomactra laminifera (E. Lamy, 1906)
   6. Species Cyamiomactra nitida Hedley, 1908
   7. Species Cyamiomactra problematica F. Bernard, 1897
      1. Variety Cyamiomactra problematica var. truncata Suter, 1911 accepted as Cyamiomactra problematica F. Bernard, 1897 (junior subjective synonym)
   8. Species Cyamiomactra symmetrica Laseron, 1953
   9. Species Cyamiomactra carina Laseron, 1953 accepted as Cyamiomactra nitida Hedley, 1908 (junior subjective synonym)
   10. Species Cyamiomactra communis Hedley, 1906 accepted as Cyamium communis (Hedley, 1906) (superseded combination)
   11. Species Cyamiomactra mactroides (Tate & May, 1900) accepted as Reloncavia mactroides (Tate & May, 1900) (superseded combination)
   12. Species Cyamiomactra robusta Nicol, 1964 accepted as Cyamiomactra laminifera (E. Lamy, 1906) (unaccepted > junior subjective synonym)
3. Genus Cyamium R. A. Philippi, 1845
   1. Species Cyamium antarcticum R. A. Philippi, 1845
   2. Species Cyamium communis (Hedley, 1906)
   3. Species Cyamium falklandicum Melvill & Standen, 1898
   4. Species Cyamium willii Pfeffer, 1886
   5. Subgenus Cyamium (Cyamiomactra) F. Bernard, 1897 accepted as Cyamiomactra F. Bernard, 1897
      1. Species Cyamium (Cyamiomactra) problematicum (F. R. Bernard, 1897) accepted as Cyamiomactra problematica F. Bernard, 1897 (superseded combination)
   6. Subgenus Cyamium (Cyamionema) Melvill & Standen, 1914 accepted as Kidderia (Cyamionema) Melvill & Standen, 1914
      1. Species Cyamium (Cyamionema) decoratum Melvill & Standen, 1914 accepted as Kidderia pusilla (A. Gould, 1850) (junior subjective synonym)
   7. Species Cyamium bennetti Preston, 1912 accepted as Cyamium antarcticum R. A. Philippi, 1845 (unaccepted > junior subjective synonym)
   8. Species Cyamium commune Thiele, 1912 accepted as Kidderia bicolor (E. von Martens, 1885) (junior subjective synonym)
   9. Species Cyamium copiosum Preston, 1913 accepted as Cyamium antarcticum R. A. Philippi, 1845 (unaccepted > junior subjective synonym)
   10. Species Cyamium cuneatum Preston, 1913 accepted as Cyamium antarcticum R. A. Philippi, 1845 (unaccepted > junior subjective synonym)
   11. Species Cyamium decoratum Melvill & Standen, 1914 accepted as Kidderia pusilla (A. Gould, 1850) (junior subjective synonym)
   12. Species Cyamium denticulatum E. A. Smith, 1907 accepted as Cyamiocardium denticulatum (E. A. Smith, 1907) (original combination)
   13. Species Cyamium exasperatum Preston, 1912 accepted as Cyamium antarcticum R. A. Philippi, 1845 (unaccepted > junior subjective synonym)
   14. Species Cyamium fragillimum Thiele, 1912 accepted as Cyamiocardium fragillimum (Thiele, 1912)
   15. Species Cyamium imitans Pfeffer, 1886 accepted as Kidderia minuta Dall, 1876
   16. Species Cyamium iridescens J. E. Cooper & Preston, 1910 accepted as Cyamium falklandicum Melvill & Standen, 1898 (unaccepted > junior subjective synonym)
   17. Species Cyamium mactroides Tate & May, 1900 accepted as Reloncavia mactroides (Tate & May, 1900)
   18. Species Cyamium minutum (O. Fabricius, 1780) accepted as Turtonia minuta (O. Fabricius, 1780)
   19. Species Cyamium mosthaffii Pfeffer, 1886 accepted as Cyamium willii Pfeffer, 1886 (unaccepted > junior subjective synonym)
   20. Species Cyamium oblongum E. A. Smith, 1898 accepted as Kidderia oblonga (E. A. Smith, 1898) (superseded combination)
   21. Species Cyamium piscium Preston, 1912 accepted as Cyamium antarcticum R. A. Philippi, 1845 (unaccepted > junior subjective synonym)
   22. Species Cyamium rotundatum Thiele, 1912 accepted as Cyamiocardium rotundatum (Thiele, 1912) (original combination)
   23. Species Cyamium stanleyense Preston, 1913 accepted as Cyamium antarcticum R. A. Philippi, 1845
   24. Species Cyamium subquadratum Pelseneer, 1903 accepted as Kidderia subquadrata (Pelseneer, 1903) (unaccepted > superseded combination)
4. Genus Eugaimardia Cotton, 1931
   1. Species Eugaimardia perplexa (Cotton, 1931)
5. Genus Jukesena Iredale, 1915
   1. Species Jukesena foveolata (J. E. Cooper & Preston, 1910)
6. Genus Legrandina Tate & May, 1901
   1. Species Legrandina aucklandica A. W. B. Powell, 1933
   2. Species Legrandina bernardi Tate & May, 1901
   3. Species Legrandina harrisonae A. W. B. Powell, 1935
   4. Species Legrandina turneri A. W. B. Powell, 1939
7. Genus Perrierina F. Bernard, 1897
   1. Species Perrierina georgiana C. A. Fleming, 1948
   2. Species Perrierina insulana A. W. B. Powell, 1933
   3. Species Perrierina matai C. A. Fleming, 1948
   4. Species Perrierina mestayerae A. W. B. Powell, 1933
   5. Species Perrierina perstriata C. A. Fleming, 1948
   6. Species Perrierina subquadrangula Dell, 1952
   7. Species Perrierina substriata A. W. B. Powell, 1935
   8. Species Perrierina taxodonta F. Bernard, 1897
   9. Subgenus Perrierina (Perrierina) F. Bernard, 1897 accepted as Perrierina F. Bernard, 1897
   10. Species Perrierina aucklandica (A. W. B. Powell, 1933) accepted as Legrandina aucklandica A. W. B. Powell, 1933 (superseded combination)
   11. Species Perrierina bernardi (Tate & May, 1901) accepted as Legrandina bernardi Tate & May, 1901 (superseded combination)
   12. Species Perrierina crassilabrum (Dell, 1964) accepted as Cyamiocardium crassilabrum Dell, 1964 (superseded combination)
   13. Species Perrierina harrisonae (A. W. B. Powell, 1935) accepted as Legrandina harrisonae A. W. B. Powell, 1935 (superseded combination)
   14. Species Perrierina turneri (A. W. B. Powell, 1939) accepted as Legrandina turneri A. W. B. Powell, 1939 (superseded combination)
8. Genus Ptychocardia Thiele, 1912
   1. Species Ptychocardia georgiana (Dell, 1964)
   2. Species Ptychocardia vanhoeffeni Thiele, 1912
   3. Species Ptychocardia rudis Hedley, 1916 accepted as Ptychocardia vanhoeffeni Thiele, 1912 (junior subjective synonym)
9. Genus Reloncavia T. Soot-Ryen, 1969
   1. Species Reloncavia chilenica (T. Soot-Ryen, 1957)
   2. Species Reloncavia mactroides (Tate & May, 1900)
10. Genus Acolus Jukes-Browne, 1913 accepted as Jukesena Iredale, 1915 (Invalid: junior homonym of Acolus Foerster, 1856 (Hymenoptera); Jukesena Iredale, 1915 is a replacement name)
11. Genus Kingiella T. Soot-Ryen, 1957 accepted as Reloncavia T. Soot-Ryen, 1969 (unaccepted > junior homonym, junior homonym of Kingiella Séguy, 1937; Reloncavia is a replacement name)
    1. Species Kingiella chilenica T. Soot-Ryen, 1957 accepted as Reloncavia chilenica (T. Soot-Ryen, 1957) (unaccepted > superseded combination, genus is a junior homonym)
12. Genus Neogaimardia Cotton, 1931 accepted as Eugaimardia Cotton, 1931 (invalid: junior homonym of Neogaimardia Odhner, 1924; Eugaimardia is a replacement name)
    1. Species Neogaimardia finlayi A. W. B. Powell, 1933 accepted as Gaimardia finlayi (A. W. B. Powell, 1933) (superseded combination)
    2. Species Neogaimardia perplexa Cotton, 1931 accepted as Eugaimardia perplexa (Cotton, 1931)

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