1. Genus Frigidocardium T. Habe, 1951
   1. Species Frigidocardium centumliratum (Melvill, 1907)
   2. Species Frigidocardium eos (Kuroda, 1929)
   3. Species Frigidocardium exasperatum (G. B. Sowerby II, 1839)
   4. Species Frigidocardium helios ter Poorten & Poutiers, 2009
   5. Species Frigidocardium iris M. Huber & ter Poorten, 2007
   6. Species Frigidocardium kiranum Sakurai & T. Habe, 1966
   7. Species Frigidocardium sancticaroli ter Poorten & Poutiers, 2009
   8. Species Frigidocardium thaanumi (Pilsbry, 1921)
   9. Species Frigidocardium torresi (E. A. Smith, 1885)
   10. Species Frigidocardium valdentatum Poutiers, 2006
2. Genus Keenaea T. Habe, 1951
   1. Species Keenaea centifilosa (P. P. Carpenter, 1864)
   2. Species Keenaea samarangae (Makiyama, 1934)
3. Genus Lophocardium P. Fischer, 1887
   1. Species Lophocardium annettae (Dall, 1889)
   2. Species Lophocardium cumingii (Broderip, 1833)
4. Genus Microcardium Keen, 1937
   1. Species Microcardium aequiliratum Poutiers, 1981
   2. Species Microcardium gilchristi (G. B. Sowerby III, 1904)
   3. Species Microcardium lukasi ter Poorten, 2023
   4. Species Microcardium morrisoni (ter Poorten & M. Huber, 2007)
   5. Species Microcardium panamense (Dall, 1908)
   6. Species Microcardium pazianum (Dall, 1916)
   7. Species Microcardium peramabile (Dall, 1881)
   8. Species Microcardium pseudocancellatum ter Poorten, 2021
   9. Species Microcardium pseudonomurai ter Poorten, 2021
   10. Species Microcardium roelofi ter Poorten, 2023
   11. Species Microcardium sakuraii (T. Habe, 1961)
   12. Species Microcardium scabrosum Poutiers, 2017
   13. Species Microcardium simillimum (E. A. Smith, 1896)
   14. Species Microcardium tenuilamellosum Poutiers, 1981
   15. Species Microcardium tinctum (Dall, 1881)
   16. Species Microcardium trapezoidale Poutiers, 2006
   17. Species Microcardium velatum ter Poorten & Poutiers, 2009
   18. Species Microcardium exasperatum (G. B. Sowerby II, 1839) accepted as Frigidocardium exasperatum (G. B. Sowerby II, 1839) (unaccepted > superseded combination)
   19. Species Microcardium thaanumi (Pilsbry, 1921) accepted as Frigidocardium thaanumi (Pilsbry, 1921) (unaccepted > superseded combination)
   20. Species Microcardium torresi (E. A. Smith, 1885) accepted as Frigidocardium torresi (E. A. Smith, 1885) (unaccepted > superseded combination)
   21. Species Microcardium transversum Rehder & Abbott, 1951 accepted as Microcardium tinctum (Dall, 1881) (unaccepted > junior subjective synonym)
   22. Species Microcardium williami Fischer-Piette, 1977 accepted as Microcardium panamense (Dall, 1908) (unnecessary replacement name for Protocardia panamensis Dall, 1908, by Fischer-Piette erroneously treated as a secondary homonym of Cardium panamense G.B. Sowerby I, 1833)
5. Genus Nemocardium Meek, 1876
   1. Species Nemocardium australojaponicum ter Poorten, 2013
   2. Species Nemocardium bechei (Reeve, 1847)
   3. Species Nemocardium enigmaticum ter Poorten, 2013
   4. Species Nemocardium fulvum ter Poorten, 2013
   5. Species Nemocardium probatum (Iredale, 1927)
   6. Subgenus Nemocardium (Keenaea) T. Habe, 1951 accepted as Keenaea T. Habe, 1951 (unaccepted > superseded rank)
      1. Species Nemocardium (Keenaea) centifilosum (P. P. Carpenter, 1864) accepted as Keenaea centifilosa (P. P. Carpenter, 1864) (unaccepted > superseded combination)
      2. Species Nemocardium (Keenaea) samarangae (Makiyama, 1934) accepted as Keenaea samarangae (Makiyama, 1934) (unaccepted > superseded combination)
   7. Subgenus Nemocardium (Microcardium) Keen, 1937 accepted as Microcardium Keen, 1937 (unaccepted > superseded rank)
      1. Species Nemocardium (Microcardium) sakuraii T. Habe, 1961 accepted as Microcardium sakuraii (T. Habe, 1961) (unaccepted > superseded combination)
   8. Subgenus Nemocardium (Nemocardium) Meek, 1876 accepted as Nemocardium Meek, 1876 (unaccepted > superseded rank)
      1. Species Nemocardium (Nemocardium) bechei (Reeve, 1847) accepted as Nemocardium bechei (Reeve, 1847) (unaccepted > superseded rank)
   9. Subgenus Nemocardium (Pratulum) Iredale, 1924 accepted as Pratulum Iredale, 1924 (unaccepted > superseded rank)
      1. Species Nemocardium (Pratulum) pulchellum (J. E. Gray, 1843) accepted as Pratulum pulchellum (J. E. Gray, 1843) (unaccepted > superseded rank)
      2. Species Nemocardium (Pratulum) thetidis (Hedley, 1902) accepted as Pratulum thetidis (Hedley, 1902) (unaccepted > superseded rank)
   10. Species Nemocardium centifilosum (P. P. Carpenter, 1864) accepted as Keenaea centifilosa (P. P. Carpenter, 1864) (unaccepted > superseded combination)
   11. Species Nemocardium exasperatum (G. B. Sowerby II, 1839) accepted as Cardium exasperatum G. B. Sowerby II, 1839 (unaccepted > superseded combination)
   12. Species Nemocardium lyratum (G. B. Sowerby II, 1840) accepted as Lyrocardium lyratum (G. B. Sowerby II, 1840) (unaccepted > superseded combination)
   13. Species Nemocardium pazianum (Dall, 1916) accepted as Microcardium pazianum (Dall, 1916) (unaccepted > superseded combination)
   14. Species Nemocardium peramabile (Dall, 1881) accepted as Microcardium peramabile (Dall, 1881) (unaccepted > superseded combination)
   15. Species Nemocardium richardsoni (Whiteaves, 1878) accepted as Nemocardium (Keenaea) centifilosum (P. P. Carpenter, 1864) (unaccepted > junior subjective synonym)
   16. Species Nemocardium thaanumi (Pilsbry, 1921) accepted as Frigidocardium thaanumi (Pilsbry, 1921) (unaccepted > superseded combination)
   17. Species Nemocardium tinctum (Dall, 1881) accepted as Microcardium tinctum (Dall, 1881) (unaccepted > superseded combination)
   18. Species Nemocardium torresi (E. A. Smith, 1885) accepted as Frigidocardium torresi (E. A. Smith, 1885) (unaccepted > superseded combination)
   19. Species Nemocardium transversum (Rehder & Abbott, 1951) accepted as Microcardium tinctum (Dall, 1881) (unaccepted > junior subjective synonym)
6. Genus Pratulum Iredale, 1924
   1. Species Pratulum occidentale Poutiers, 2017
   2. Species Pratulum pulchellum (J. E. Gray, 1843)
   3. Species Pratulum thetidis (Hedley, 1902)
   4. Species Pratulum probatum Iredale, 1927 accepted as Nemocardium probatum (Iredale, 1927) (unaccepted > superseded combination)
7. Genus Decussicardium Fischer-Piette, 1977 accepted as Microcardium Keen, 1937 (unaccepted > unavailable name, no description)
8. Genus Trifaricardium Kuroda & T. Habe, 1951 accepted as Frigidocardium T. Habe, 1951 (unaccepted > junior subjective synonym)
   1. Species Trifaricardium morrisoni ter Poorten & M. Huber, 2007 accepted as Microcardium morrisoni (ter Poorten & M. Huber, 2007) (unaccepted > superseded combination)

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