1. Subfamily Acanthopleurinae Dall, 1889
   1. Genus Acanthopleura Guilding, 1830
   2. Genus Enoplochiton J. E. Gray, 1847
   3. Genus Liolophura Pilsbry, 1893
   4. Genus Mesotomura Pilsbry, 1893
   5. Genus Squamopleura Nierstrasz, 1905
   6. Genus Acanthozostera Iredale & Hull, 1926 accepted as Acanthopleura Guilding, 1830 (unaccepted > junior subjective synonym)
   7. Genus Clavarizona Hull, 1923 accepted as Liolophura Pilsbry, 1893 (unaccepted > junior subjective synonym)
   8. Genus Corephium J. E. Gray, 1847 (uncertain)
2. Subfamily Chitoninae Rafinesque, 1815
   1. Genus Chiton Linnaeus, 1758
   2. Genus Mucrosquama Iredale & Hull, 1926
   3. Genus Radsia J. E. Gray, 1847
   4. Genus Rhyssoplax Thiele, 1893
   5. Genus Sypharochiton Thiele, 1893
   6. Genus Tegulaplax Iredale & Hull, 1926
   7. Genus Amaurochiton Thiele, 1893 accepted as Chiton Linnaeus, 1758 (unaccepted > junior subjective synonym)
   8. Genus Anthochiton Thiele, 1893 accepted as Rhyssoplax Thiele, 1893 (unaccepted > junior subjective synonym)
   9. Genus Chondroplax Thiele, 1893 accepted as Chiton Linnaeus, 1758 (unaccepted > junior subjective synonym)
   10. Genus Diochiton Thiele, 1893 accepted as Chiton Linnaeus, 1758 (unaccepted > junior subjective synonym)
   11. Genus Georgus Thiele, 1893 accepted as Rhyssoplax Thiele, 1893 (unaccepted > junior subjective synonym)
   12. Genus Oscabrion "Herrmannsen, 1847" accepted as Chiton Linnaeus, 1758 (synonym (refers to Oscabrion Petiver, 1702))
   13. Genus Poeciloplax Thiele, 1893 accepted as Chiton Linnaeus, 1758 (unaccepted > junior subjective synonym)
   14. Genus Sclerochiton Dall, 1882 accepted as Chiton Linnaeus, 1758 (invalid: junior homonym of Sclerochiton Kraatz, 1859 [Coleoptera])
   15. Genus Gymnoplax Gray, 1821 (uncertain > taxon inquirendum)
   16. Genus Mopaliopsis Thiele, 1893 (uncertain > nomen dubium)
   17. Genus Rhopalopleura Thiele, 1893 (uncertain > taxon inquirendum)
   18. Genus Stereoplax Thiele, 1893 (uncertain > taxon inquirendum)
3. Genus Oochiton Ashby, 1929 †
4. Subfamily Toniciinae Pilsbry, 1893
   1. Genus Lucilina Dall, 1882
   2. Genus Onithochiton J. E. Gray, 1847
   3. Genus Tonicia Gray, 1840
   4. Genus Nodiplax Beu, 1967 accepted as Onithochiton J. E. Gray, 1847 (synonym)
   5. Genus Onithella Mackay, 1933 accepted as Onithochiton J. E. Gray, 1847 (synonym)
   6. Genus Onitochiton [sic] accepted as Onithochiton J. E. Gray, 1847 (incorrect subsequent spelling)
   7. Genus Pristochiton Clessin, 1904 accepted as Onithochiton J. E. Gray, 1847 (synonym)
   8. Genus Rapanuia Dell'Angelo, Raines & Bonfitto, 2004 accepted as Tonicia Gray, 1840
   9. Genus Tonichia accepted as Tonicia Gray, 1840 (unaccepted > misspelling - incorrect original spelling)
   10. Genus Toniciopsis Thiele, 1893 accepted as Lucilina Dall, 1882 (unaccepted > junior subjective synonym)
5. Subfamily Rapanuiinae Dell'Angelo, Raines & Bonfitto, 2004 accepted as Toniciinae Pilsbry, 1893

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