1. Tribe Castaliini Morretes, 1949
   1. Genus Callonaia C. T. Simpson, 1900
   2. Genus Castalia Lamarck, 1819
   3. Genus Castaliella C. T. Simpson, 1900
   4. Genus Castalina Ihering, 1891 accepted as Castalia Lamarck, 1819 (unaccepted > junior subjective synonym)
   5. Genus Tetraplodon Spix, 1827 accepted as Castalia Lamarck, 1819 (unaccepted > junior subjective synonym)
   6. Genus Tetraplon [sic] accepted as Castalia Lamarck, 1819 (unaccepted > misspelling)
2. Tribe Hyridellini McMichael, 1956
   1. Genus Cucumerunio Iredale, 1934
   2. Genus Echyridella McMichael & Hiscock, 1958
   3. Genus Hyridella Swainson, 1840
   4. Genus Megalovirgus Hocknull, 2000 †
   5. Genus Mesohyridella McMichael, 1957 †
   6. Genus Palaeohyridella Hocknull, 2000 †
   7. Genus Virgus C. T. Simpson, 1900
   8. Genus Protohyridella Cotton & Gabriel, 1932 accepted as Hyridella (Protohyridella) Cotton & Gabriel, 1932 represented as Hyridella Swainson, 1840
3. Tribe Hyriini Swainson, 1840
   1. Genus Prisodon Schumacher, 1817
   2. Genus Triplodon Spix, 1827
   3. Genus Paxyodon Schumacher, 1817 accepted as Prisodon Schumacher, 1817 (unaccepted > junior subjective synonym)
4. Tribe Rhipidodontini Starobogatov, 1970
   1. Genus Diplodon Spix, 1827
   2. Genus Rhipidodonta Mörch, 1853
   3. Genus Castalioides W. B. Marshall, 1934 † accepted as Diplodon (Ecuadorea) W. B. Marshall & Bowles, 1932 † represented as Diplodon Spix, 1827 (unaccepted > junior subjective synonym)
   4. Genus Ecuadorea W. B. Marshall & Bowles, 1932 † accepted as Diplodon (Ecuadorea) W. B. Marshall & Bowles, 1932 † represented as Diplodon Spix, 1827 (unaccepted > superseded rank)
   5. Genus Ecuadoria [sic] † accepted as Diplodon (Ecuadorea) W. B. Marshall & Bowles, 1932 † represented as Diplodon Spix, 1827 (unaccepted > misspelling)
   6. Genus Iridea Swainson, 1840 accepted as Diplodon Spix, 1827 (junior subjective synonym)
5. Genus Cyclomya C. T. Simpson, 1900 accepted as Rhipidodonta Mörch, 1853 (junior subjective synonym)

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