According to the author insufficient proofs exist to consider Stenella plagiodon (Cope, 1866) a junior synonym of Delphinus pernettensis de Blainville, 1817 or of Delphinus pernettyi Desmarest, 1820. To avoid further confusion the International Commission on Zoological Nomenclature is requested to use their plenary powers to suppress for the purposes of the Law of Priority but not for those of the Law of Homonymy the following specific names: a. pernettensis de Blainville, 1817, as published in the combination Delphinus pernettensis; b. pernettyi Desmarest, 1820, as published in the combination Delphinus pernettyi.