1. Genus Florenceia Mezzalira, 1974 †
2. Subfamily Hyriinae Swainson, 1840
   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 superseded rank)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)
3. Subfamily Velesunioninae Iredale, 1934
   1. Genus Alathyria Iredale, 1934
   2. Genus Lortiella Modell, 1942
   3. Genus Microdontia Tapparone Canefri, 1883
   4. Genus Prohyria McMichael, 1957 †
   5. Genus Velesunio Iredale, 1934
   6. Genus Westralunio Iredale, 1934
4. Genus Aparcthyria Iredale, 1934 accepted as Velesunio Iredale, 1934 (junior synonym)
5. Subfamily Castaliinae Morretes, 1949 accepted as Castaliini Morretes, 1949 (original rank)
6. Genus Centralhyria Iredale, 1934 accepted as Velesunio Iredale, 1934 (junior synonym)
7. Genus Cucumaria Conrad, 1853 accepted as Cucumerunio Iredale, 1934 (Invalid: junior homonym of Cucumaria Blainville, 1830 [Echinodermata])
8. Genus Hyria Lamarck, 1819 accepted as Prisodon Schumacher, 1817 (unavailable; a junior synonym of Prisodon Schumacher, 1817)
9. Genus Hyridunio Iredale, 1934 accepted as Hyridella Swainson, 1840
10. Genus Leiovirgus F. Haas, 1912 accepted as Hyridella Swainson, 1840 (unaccepted > junior subjective synonym)
11. Genus Lortiella Iredale, 1934 accepted as Lortiella Modell, 1942 (not available: no type species fixed in original description)
12. Genus Propehyridella Cotton & Gabriel, 1932 accepted as Hyridella Swainson, 1840 (junior synonym)
13. Genus Quaesithyria Iredale, 1943 accepted as Alathyria Iredale, 1934 (junior synonym)
14. Genus Rugoshyria Iredale, 1934 accepted as Hyridella Swainson, 1840
15. Genus Unis F. W. Hutton, 1883 accepted as Unio Philipsson, 1788 (orthographic variant)

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