1. Genus Polygyratia J. E. Gray, 1847
2. Genus Ridleyconcha Christensen, 2020
3. Subfamily Scolodontinae H. B. Baker, 1925
   1. Genus Austroselenites Kobelt, 1905
   2. Genus Drepanostomella Bourguignat, 1890
   3. Genus Happia Bourguignat, 1890
   4. Genus Hirtudiscus Hylton Scott, 1973
   5. Genus Luteostriatella Roosen & Breure, 2024
   6. Genus Scolodonta Doering, 1875
   7. Genus Systrophia L. Pfeiffer, 1855
   8. Genus Systrophiella H. B. Baker, 1925
   9. Genus Zilchistrophia Weyrauch, 1960
   10. Genus Ammonoceras L. Pfeiffer, 1855 accepted as Happia Bourguignat, 1890 (unaccepted > junior homonym, invalid: junior homonym of Ammonoceras Lamarck, 1822 [Cephalopoda]; Happia is a replacement name)
   11. Genus Entodina Ancey, 1887 accepted as Systrophia (Entodina) Ancey, 1887 represented as Systrophia L. Pfeiffer, 1855 (original rank)
   12. Genus Prohappia Thiele, 1927 accepted as Happia (Prohappia) Thiele, 1927 represented as Happia Bourguignat, 1890 (new rank)
   13. Genus Wayampia Tillier, 1980 accepted as Scolodonta Doering, 1875
4. Subfamily Tamayoinae Tillier, 1980
   1. Genus Guestieria Crosse, 1872
   2. Genus Happiella H. B. Baker, 1925
   3. Genus Microhappia Thiele, 1927
   4. Genus Miradiscops H. B. Baker, 1925
   5. Genus Tamayoa H. B. Baker, 1925
   6. Genus Occultator Pilsbry, 1926 accepted as Happiella H. B. Baker, 1925
5. Genus Xenodiscula Pilsbry, 1919
6. Genus Ophiogyra Albers, 1850 accepted as Polygyratia J. E. Gray, 1847 (objective junior synonym)
7. Genus Ridleya Ancey, 1901 accepted as Ridleyconcha Christensen, 2020 (invalid: junior homonym of Ridleya Delage & Hérouard, 1899 [Porifera]; Ridleyconcha is a replacement name)

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