1. Genus Ceratophorus P. P. Carpenter, 1882 accepted as Ceratozona Dall, 1882 (unaccepted > junior homonym, invalid: junior homonym of Ceratophorus Diesing, 1850; Ceratozona is a replacement name.)
2. Genus Ceratozona Dall, 1882
3. Genus Gallardochiton Sirenko, 2020
4. Genus Gallardoia Sirenko, 2007 accepted as Gallardochiton Sirenko, 2020 (invalid: junior homonym of Gallardoia Bruch, 1924 [Coleoptera]; Gallardochiton is a replacement name)
5. Subfamily Juvenichitoninae Sirenko, 1975
   1. Genus Juvenichiton Sirenko, 1975
   2. Genus Micichiton Sirenko, 1975
   3. Genus Nanichiton Sirenko, 1975
6. Subfamily Tonicellinae Simroth, 1894
   1. Genus Adriella Thiele, 1893 accepted as Lepidochitona J. E. Gray, 1821 (unaccepted > junior subjective synonym)
   2. Genus Beanella Dall, 1882 accepted as Lepidochitona J. E. Gray, 1821 (synonym)
   3. Genus Boreochiton G. O. Sars, 1878
   4. Genus Craspedochilus G. O. Sars, 1878 accepted as Lepidochitona J. E. Gray, 1821 (synonym)
   5. Genus Cyanoplax Pilsbry, 1892
   6. Genus Lepidochiton J. E. Gray, 1821 accepted as Lepidochitona J. E. Gray, 1821 (incorrect subsequent spelling)
   7. Genus Lepidochitona J. E. Gray, 1821
   8. Genus Middendorffia P. P. Carpenter, 1882 accepted as Lepidochitona J. E. Gray, 1821
   9. Genus Mopaliella Thiele, 1909 accepted as Cyanoplax Pilsbry, 1892 (unaccepted > junior subjective synonym)
   10. Genus Nuttalina accepted as Nuttallina Dall, 1871 (incorrect subsequent spelling)
   11. Genus Nuttallina Dall, 1871
   12. Genus Particulazona Kaas, 1993
   13. Genus Spongioradsia Pilsbry, 1894
   14. Genus Strictochiton Sirenko, 2020
   15. Genus Tonicella P. P. Carpenter, 1873
   16. Genus Trachydermon P. P. Carpenter, 1864 accepted as Lepidochitona J. E. Gray, 1821 (synonym)

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