The International Commission on Zoological Nomenclature has hereby removed the homonymy between the family-group names Chilodontidae Bronn, 1859, Chilodontinae, an emendation of Chilodinae Eigenmann, 1910, and Chilodontinae Wenz, 1938, by: 1) using its plenary power to suppress the genus-group name Chilodon Ehrenberg, 1834 (Ciliophora) for the purposes of the Principle of Priority but not for those of the Principle of Homonymy, and the family-group name Chilodontidae Bronn, 1859 (Ciliophora) for the purposes of both the Principle of Priority and the Principle of Homonymy; and 2) using its specific powers to rule that the family-group name Chilodontinae, as emended by Fowler, is an unjustified emendation of the original spelling Chilodinae Eigenmann, 1910 (Pisces). Therefore, the family-group name Chilodontidae Wenz, 1938 (Gastropoda) remains unchanged, the family-group name Chilodontidae Bronn, 1859 (Ciliophora) is placed on the Official Index of Rejected and Invalid Family-Group Names in Zoology and Chilodinae Eigenmann, 1910 is to be used in Pisces.