1. Family Basterotiidae Cossmann, 1909
2. Family Galeommatidae Gray, 1840
3. Family Lasaeidae J. E. Gray, 1842
4. Family Chlamydoconchidae Dall, 1884 accepted as Galeommatidae Gray, 1840
5. Family Ephippodontidae Scarlato & Starobogatov, 1979 accepted as Galeommatidae Gray, 1840 (unaccepted > junior subjective synonym)
6. Family Erycinidae Deshayes, 1850 accepted as Lasaeidae J. E. Gray, 1842 (Invalid: junior homonym of Erycinidae Swainson, 1827, based on Erycina Fabricius, 1807 [Lepidoptera])
7. Family Eucharidae Récluz, 1869 accepted as Basterotiidae Cossmann, 1909 (invalid: Type genus a junior homonym of Eucharis Latreille, 1804 [Hymenoptera].)
8. Family Kelliidae Forbes & Hanley, 1848 accepted as Lasaeidae J. E. Gray, 1842
9. Family Kellyidae Forbes & Hanley, 1848 accepted as Kelliidae Forbes & Hanley, 1848 accepted as Lasaeidae J. E. Gray, 1842 (unaccepted > misspelling - incorrect subsequent spelling)
10. Family Leptonidae Gray, 1847 accepted as Lasaeidae J. E. Gray, 1842
11. Family Montacutidae W. Clark, 1855 accepted as Montacutinae W. Clark, 1855 (unaccepted > superseded rank)
12. Family Vasconiellidae Scarlato & Starobogatov, 1979 accepted as Galeommatidae Gray, 1840 (unaccepted > junior subjective synonym)

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