Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
       Parvclass Picae (C. Linnaeus, 1758) see Order Piciformes Meyer & Wolf, 1810
         Order Piciformes Meyer & Wolf, 1810 - scansorial birds
           Infraorder Ramphastides see Superfamily Ramphastoidea Vigors, 1825
             Superfamily Ramphastoidea Vigors, 1825
               Family Ramphastidae Vigors, 1825 - toucans and barbets
                 Subfamily Ramphastinae - toucans see Family Ramphastidae Vigors, 1825
                   Genus Aulacorhynchus Gould, 1834
                     Aulacorhynchus sulcatus (Swainson, 1820) - groove-billed toucanet
                       1 Aulacorhynchus sulcatus calorhynchus (Gould, 1874) - yellow-billed toucanet
                       2 Aulacorhynchus sulcatus sulcatusᵀ (Swainson, 1820) - groove-billed toucanet