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

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