1. Subfamily Marioniinae F. V. Silva, Pola & Cervera, 2023
   1. Genus Marionia Vayssière, 1877
   2. Genus Marioniopsis Odhner, 1934
   3. Genus Paratritonia Baba, 1949
2. Subfamily Tritoniinae Lamarck, 1809
   1. Genus Candiella J. E. Gray, 1850
   2. Genus Marianina Pruvot-Fol, 1931
   3. Genus Myrella Odhner, 1963
   4. Genus Tochuina Odhner, 1963
   5. Genus Tritonia Cuvier, 1798
   6. Genus Tritonicula Korshunova & Martynov, 2020
   7. Genus Tritonidoxa Bergh, 1907
   8. Genus Tritoniella Eliot, 1907
   9. Genus Tritoniopsis Eliot, 1905
   10. Genus Candellista Iredale & O'Donoghue, 1923 accepted as Tritonia Cuvier, 1798 (unaccepted > junior subjective synonym)
   11. Genus Duvaucelia Risso, 1826 accepted as Marionia Vayssière, 1877 (unaccepted > junior subjective synonym)
   12. Genus Lateribranchiaea Stearns, 1873 accepted as Tritonia Cuvier, 1798 (unaccepted > junior subjective synonym)
   13. Genus Mariana Pruvot-Fol, 1930 accepted as Marianina Pruvot-Fol, 1931 (Invalid: junior homonym of Mariana Quoy & Gaimard, 1825; Marianina is a replacement name)
   14. Genus Microlophus Mabille & Rochebrune, 1889 accepted as Myrella Odhner, 1963 (unaccepted > junior homonym, Invalid: junior homonym of Microlophus Duméril & Bibron, 1837 [Reptilia]; Myrella is a replacement name)
   15. Genus Nemocephala A. Costa, 1867 accepted as Candiella J. E. Gray, 1850 (unaccepted > junior subjective synonym)
   16. Genus Sphaerostoma MacGillivray, 1843 accepted as Tritonia Cuvier, 1798 (unaccepted > junior subjective synonym)
   17. Genus Tritoniopsilla Pruvot-Fol, 1933 accepted as Tritoniopsis Eliot, 1905 (invalid: unnecessary substitute name for Tritoniopsis Eliot, 1905, which is not a junior homonym of Tritonopsis Conrad, 1865)

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