Class Mammalia Linnaeus, 1758 - mammals
   Order Cetacea Brisson, 1762 - whales, dolphins, and porpoises see Infraorder Cetacea Brisson, 1762
     Suborder Odontoceti Flower, 1867 - toothed whales see Parvorder Odontoceti Flower, 1867
       Family Delphinidae Gray, 1821 - oceanic dolphins
         Genus Sotalia Gray, 1866 - tucuxi
           1 Sotalia fluviatilis (Gervais & Deville, in Gervais, 1853) - tucuxi